ADSL Protocol Basics - ActForNet · 2015-06-10 · Information capacity defines the bits of the data modulated by each carrier. DMT uses 4.3125 kHz bandwidth as its unit. It divides

HUAWEI TECHNOLOGIES CO., LTD. For internal use only Page 0

Jun 2006

ADSL Protocol Basics

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

ISSUE1.0


As the Internet develops rapidly, human

being demands more and more of the

network rate and bandwidth. The great

demand urges the network to develop

from low-speed to high-speed, sharing to

switching, and narrowband to broadband.

This course describes the Asymmetrical

Digital Subscriber Loop (ADSL), a

mainstream technology on access

network (AN).


Reference

Huawei ADSL2+ Principle and Testing Service Guide -

20050318-A

http://support.huawei.com/support/pages/kbcenter/view/pr

oduct.do?actionFlag=detailProductSimple&web_doc_id=

SC0000104718&doc_type=123-1


By taking this course, you can

Know the mainstream xDSL technologies

Master the ADSL/ADSL2/ADSL2+ principles

Master the ADSL/2/2+ parameters

Know the trend of the ADSL technology


Chapter 1 xDSL Overview

Chapter 2 ADSL/ADSL/ADSL2+ Principles

Chapter 3 ADSL Parameters

Chapter 4 ADSL Trend


Mainstream Bearer Technology on Access Network

xDSL Flourishing Physical lines cover a large scale and resources are exclusive in the xDSL

technologies. Therefore, the xDSL technologies dominant the access network since its birth.

Ethernet Striving The Ethernet technology that is originally applied to the enterprise LANs has

developed a new market because of the birth of broadband access. The Ethernet and xDSL technologies supplement each other gradually. Nowadays, the Ethernet technology is mainly applied to the AN convergence layer and the leased lines of VIP customers.

PON Developing The newly-appeared Passive Optical Network (PON) technology provides the

gigabit bandwidth for users at a lower cost. It is no doubt that the PON technology will be a superior opponent to access network.


xDSL

The ADSL technology uses the existing twisted pairs to provide asymmetrical

upstream and downstream rate for users.

The G.SHDSL technology provides the symmetrical and high-speed leased line

access service on twisted pairs for users. It is mainly applied to the

interconnection of small and medium-sized enterprises, the base station relay of

China Mobile and the ISDN primary access.

The VDSL technology realizes the leased line connection and access. It is mainly

applied to hotel, high-speed access, video meetings, and so on.

ADSL: the Asymmetrical Digital Subscriber Line

G.SHDSL: the Single-pair High-speed Digital Subscriber Line

VDSL: the Very High Speed Digital Subscriber Line


DSL Forming and Developing

xDSL Development

Middle

1970s Late 1980s Early 1990s Time Late 1990s

ISDN HDSL ADSL VDSL Other DSL

xDSL

Digital Subscriber Line


ADSL Overview

ADSL is an asymmetrical xDSL technology. It makes full use of the untapped

high-frequency band to transmit data over copper cables at high speed by

diversified modulation. Its upstream band ranges from 26 kHz to 138 kHz, and its

downstream band from 138 kHz to 1104 kHz. Its upstream rate reaches 896 kbps

and downstream 8160 kbps.

ADSL has capability of adapting rate and anti-interference. Namely, the ADSL

technology can adjust its rate to a proper degree based on the line conditions,

such as distance, noise, and so on. In the ADSL technology, the longer the

transmission distance is, the lower the transmission rate is and the more the

transmission attenuates. But the transmission distance and attenuation are not in

linear proportion.


G.SHDSL Overview

G.SHDSL is a new symmetrical subscriber line technology developed from the High-speed

Digital Subscriber Line (HDSL), the Simultaneous Digital Subscriber Line (SDSL) and the

Integrated Services Digital Network (ISDN). SHDSL has many features such as multi-rate,

optimized performance, lower power consumption for transmitting and compatible spectrum.

The rate of a single pair ranges from 192 kbps to 2312 kbps, and can be adjusted adaptively

with 8k as its granularity based on the line conditions. The transmission reaches 3 km to 5.5

km in the G.SHDSL technology.

The SHDSL technology has the following advantages:

Extends the transmission distance of E1/V.35 (TDM) to 3 – 5.5 km that is four times or more

farther than that of the common E1/V.35.

Provides long-distance leased line access and extends the FR/CES networking distance

based on the TDM mode.

Makes full use of the existing copper cables to access broadband services asymmetrically.


VDSL Overview

VDSL is a new xDSL technology to provide symmetrical or asymmetrical upstream and

downstream rate over twisted pairs. Its transmission reaches about 1.5 km, the highest

downstream rate is 52 M (asymmetrical) and the highest upstream rate is 12 M

(symmetrical). VDSL is the fastest xDSL technology at present.

ITU-T G.993.1 serves as the VDSL.

At home or in office, VDSL is thought as the technology to get the closest transmission

rate provided by optical fibers. VDSL permits the connection by analog telephones and by

high-speed data simultaneously, but it can transmit high-speed data only with short reach.

VDSL is similar to ADSL. But it is much easier to realize VDSL because ADSL is designed

for the line conditions that are worse than those of VDSL.


xDSL Performance

Feature Comparison

xDSL Symmetry Maximum Rate Maximum

Distance (km)

Twisted

Pair

POTS

Service

G.SHDSL Asymmetrical 2.3 Mbps 5.5 1 No

ADSL Asymmetrical Downstream: 8196 kbps

Upstream: 896 kbps 5 1 Yes

ADSL2+ Asymmetrical Downstream: 25 Mbps

Upstream: 3 Mbps 6.5 1 Yes

VDSL Symmetrical/A

symmetrical

Downstream: 52 Mbps (asymmetrical)

Upstream: 12 Mbps (symmetrical) 1.5 1 Yes


Questions

1. What are the technical features of the ADSL, VDSL and

G.SHDSL technologies?

2. What are the applications of the ADSL, VDSL and G.SHDSL

technologies?







Chapter 2 ADSL/ADSL2/ADSL2+ Principles

2.1 ADSL Protocols Standardization

2.2 ADSL Principle

2.3 ADSL2 Features

2.4 ADSL2+ Features


ADSL Standards

Some international organizations take on the standardization of the ADSL technologies,

including the American National Standards Institute (ANSI), the ITU Telecommunications Union

-Telecommunications Sector (ITU-T), and the ADSL Forum.

FAMILY DESCRIPTION RATIFIED

ADSL G.992.1/ T1.413 G.dmt 1999

ADSL G.992.2 G.lite 1999

ADSL2 G.992.3 G.dmt.bis 2002

ADSL2 G.992.4 G.lite.bis 2002

ADSL2+ G.992.5 ADSL2 PLUS 2003




2.2 ADSL Principle

2.3 ADSL2 Features

2.4 ADSL2+ Features


ADSL Model

• ADSL features

1. The upstream rate reaches

896 kbps and downstream

rate 8 Mbps.

2. ADSL: Asymmetric Digital

Subscriber Line

3. Transmit voice and data on a

twisted pair simultaneously.

ADSL standards

G.992.1(G.dmt)

Standard

of full-

rate

ADSL

Standard

of full-

rate

ADSL

Standard

of ADSL

without

signal

splitter

G.992.2(G.lite) T1.413

Twisted pair

ATU-R

Splitter

Splitter

PSTN

Internet


G.Lite Overview

In G.dmt mode, ADSL needs voice splitters and cannot connect the

devices manufactured by different vendors. However, in G.Lite mode,

ADSL does not need voice splitters and cuts down the cost of chips and

installation.

Features of the low-speed G.Lite

1. G.Lite cuts down costs and needs no splitter.

2. G.Lite uses the DMT line encoding mode that performs the anti-

interference well.

3. G.Lite provides asymmetrical rate, 512 kbps for upstream and 1.5 Mbps

for downstream.

4. G.Lite extends the transmission distance to 7 km at most.

G.Lite is rarely used in China by taking bandwidth and market into account.


ADSL Modulation & Demodulation

As for the modulation-demodulation technology, we often use the high-speed digital signal

processing technology and the modulation coding with optimized performance to get high speed

and long distance in transmission.

So far, the ADSL modulation-demodulation system uses the following three line encoding

technologies:

Quadrature Amplitude Modulation (QAM): It modulates two signals into a carrier frequency. The

amplitude modulation frequency of the two signals are the same but their phase difference is 90

degree.

Carrierless Amplitude/Phase Modulation (CAP): It is based on QAM to modulate data to a single

carrier.

Discrete Multi-Tone (DMT): It modulates data to multi-carrier, and the data on each carrier is

modulated by QAM. DMT is by far the mainstream modulation technology.

The DMT modulation technology dominants the market for its powerful anti-interference and

popular style.


DMT

DMT is by far the commonly-used modulation technology. It segments the transmission band

into multiple subchannels, each subchannel corresponds to a carrier of different frequency and is

modulated on the corresponding carrier in the QAM mode. The transmission performance of the

current subchannels decides the capacity of the transmitted information in each subchannel.

Information capacity defines the bits of the data modulated by each carrier.

DMT uses 4.3125 kHz bandwidth as its unit. It divides a 1 MHz band into 256 subchannels.

The POTS service occupies the band ranging from 300 Hz to 4 kHz on the telephone wire. By

taking the isolation into consideration, DMT assigns the band from 0 kHz to 25 kHz (namely, the

first six channels) to the POTS service. Therefore, only 250 subchannels are actually assigned

for transmitting digital services.

Each subchannel uses QAM in the DMT technology except the first six subchannels. QAM

piles up the output waveform since each subchannel has its own frequency, and then outputs the

piled waveform to lines. The peer receive end first restores the piled waveform based on the

frequency, and distributes them to each subchannel; then each subchannel uses QAM to

demodulate the waveform into data bits.


DMT Sub-Carrier

16 31 64 256

1.1MHz

4.3125 kHz

Voice

tone

26KHz

69 kHz: upstream pilot tone

7

276 kHz: downstream

pilot tone

1

Upstream subcarrier Downstream subcarrier

Available band Subchannel

Data SNR

noise

attenuate

s

Object 1

Object 2


ADSL System Initialization

Activate the request and

confirm the procedure Transceiver negotiation Channel analyzing Parameter switching

• Process

• Aims

The ADSL system initialization aims to test the performance of actual

subchannels, and to balance the transmission configuration between

ATU-C and ATU-R before their work, such as the upstream and

downstream rate, the number of sub-band, and so on. And finally, the

ADSL system initialization sets up an available link for communication.




2.2 ADSL Principle

2.3 ADSL2 Features

2.4 ADSL2+ Features


ADSL2 Standard

ADSL2 is developed from ADSL, its standard (G.992.3) has

been defined in June, 2002.

ADSL2 assigns the band as ADSL does, their downstream band

is 1104 kHz. Since ADSL2 uses the enhanced modulation mode,

its downstream rate can theoretically reaches 12 Mbps and its

upstream rate 1.2 Mbps or so.

The Annex I/J of G.992.3 enhances the all-digital loop mode.

Annex I works if the loop line carries the POTS service; Annex J

works if the loop line carries the ISDN service. The Annex L of

G.992.3 refers to the long-distance ADSL2.


Comparison Between ADSL2 and ADSL

ADSL2 has better performance.

Because ADSL2 uses the enhanced modulation mode, it

weakens the impact on signal from line noises, gets more line

coding gain, and promotes the rate for connecting.

ADSL2 uses the variable overhead bit, its overhead rate ranges

from 4 kbps to 32 kbps. ADSL uses the constant overhead rate

32 kbps. Compared with ADSL, ADSL2 increases its rate by 50

kbps and extends its transmission distance by 200 m. Namely,

the coverage of ADSL2 is increased by 6%.


Comparison Between ADSL2 and ADSL


New Features of ADSL2 — Lower Power Consumption ADSL2 manages the power consumption to lower the running consumption. This new function is presented as

follows:

1) ADSL2 lowers the transmitting power consumption to reduce the unexpected noise margin. Namely, lower the

futile power consumption on the premise of the service stability. The supplementary L2 mode lowers the power

consumption. This mode only guarantees the power consumption to transmit the required management

messages and synchronization signals (for example, using 1-bit constellation ) when no service data is

transmitted. In addition, when there is the user data that needs transmitting, the power consumption can be

restored at once. The power consumption in L2 mode is only 30% of that in normal operation.

2) The central office (CO) and the customer premise equipment (CPE) of ADSL2 can perform the function

“power cutback” ranging from 0 dB to 40 dB. By working with the first rule, this function can lower the power

consumption in transmission when the device runs normal. For ADSL, only CO has such a function and ranges

from 0 dB to 12 dB.


New Features of ADSL2 — Modularization Architecture

For ADSL2/ADSL2+, the ADSL transceiver is functionally divided

as follows:

Transport protocol specific transmission convergence (TPS-TC)

Physical media specific transmission convergence (PMS-TC)

Physical media dependent (PMD)

Management protocol specific transmission convergence (MPS-TC)

Each sublayer is encapsulated, and messages between these

sublayers are defined. This is helpful for the interconnection between

devices made by different vendors.




2.2 ADSL Principle

2.3 ADSL2 Features

2.4 ADSL2+ Features


ADSL2+ Standards

ADSL2+ is the second generation full-rate ADSL. In 2003, ITU

presents G.992.5 that is also called the ADSL2+ standard.

G.992.5 is compatible with the first generation ADSL standard, and

it has more functions, higher rate and more stable operation. For

its advantages account, ADSL2+ attracts more attention and

prevails in application.

ADSL has high rate, supports multi-service, and is maintainable.

Therefore, ADSL has been the mainstream xDSL technology

nowadays.


ADSL2+ Feature — High Rate & Long Distance

Higher rate and Wider downstream bands The following figure compares the spectrum distribution of ADSL2 and ADSL2+.

Compared with ADSL2, the ADSL2+ frequency ranges higher (tone 32–511), and

ADSL2+ has more subbands (512). Therefore, ADSL2+ provides 24 Mbps or

more for the upstream rate. Besides, ADSL2+ extends the transmission distance.


ADSL2+ Features

Longer transmit distance

The transmit distance of ADSL2/ADSL+ reaches 6.5 km or more

with the rate of 192/96 kbps

ADSL2 supports 1-bit constellation, and ADSL supports 2-bit

constellation at minimum.

ADSL2 annex L uses a new spectrum allocation. If the distance is

over 4 km, the subband higher than Tone 128 are disabled to

promote the transmit power of the subband that is lower than Tone

128, and to increase the distance.

The frame overhead can be flexibly configured to provide 28 kbps

bandwidth. This is very important in the case of long distance.

The receiver decides the tone ordering and the pilot tone. This

improves the problem that ADSL cannot be activated pilot tone

because of the low SNR of the ADSL pilot tone signal. In addition,

the 2 bits carried by the pilot tone can provide 8 kbps extra


ADSL2+ Features


ADSL2+ Features

Rate Binding Carriers often need provide the service of different levels for various customers. The

diversified services are made a whole through binding multiple telephone wires to promote

the rate for the home user and the business user. The ADSL2 standard supports the IMA

standard of the ATM operation to bind the services. Using the IMA technology, ADSL2 binds

two or more copper wires as one ADSL connection. In this case, the downstream rate

promotion is flexible.

IMA adds a new sublayer between the physical layer and the ATM layer of ADSL. At the

transmit end, the IMA sublayer distributes the ATM data stream from the ATM layer into

multiple ADSL physical layers. The process at the receive end is on the contrary.

To bind the services of various bit error rate and delay, the IMA sublayer defines the IMA

frame, protocol and managing function in a detailed manner. Meanwhile, the IMA sublayer

requires some functions of the ADSL physical layer to be updated. For example, discard the

idle cell and the error code at the receive end.


ADSL2+ Features

More reliable running & Good spectrum compatibility

The receiver decides the tone ordering based on the channel analysis result,

and selects the tone of the best performance as the pilot tone. This makes for

the stable ADSL connection.

During the negotiation, the tone is disabled, and the receiver tests the

distribution of the radio frequency interference (RFI) for bypassing the RFI signal

and reducing the crosstalk on other twisted pairs.

ADSL2+ has a good capability of dynamic adaptation. For example, it enhances

the bit swap function, and changes the line rate seamlessly and dynamically.

The power cutback of the receiver and the transmitter is 40 dB high, and

reduces the echo and crosstalk at local end.

The receiver decides the pilot tone, and avoids that the line cannot be activated

because of the line connector interference or the AM interference.

ADSL2+ shortens the negotiation process, and quickly restores the connection

synchronization from errors.


ADSL2+ Features

SRA ADSL2+ can improve the crosstalk problem by using the seamless rate adaptive

(SRA) technology. Using SRA, ADSL2+ can change the ADSL transmit power without

changing the ADSL connection rate and bit error rate. When detecting the channel

condition change, ADSL2+ adapts the rate to the change. This point is transparent to

subscribers.

SRA is used for the decoupling at the modulation layer and the framing layer of the

ADSL2+ system. Decoupling enables the modulation layer to change the transmit rate

parameter, but it does not change the parameter of the framing layer. Pay attention that

the bit error will occur and cause the system restarted if the parameter of the framing

layer changes and causes the frame synchronization loss.


ADSL2/ADSL2+ Features Overview

1. Enhanced coding function

2. Lower power consumption

3. Modularization structure

4. High rate & Long distance

5. Rate binding function

6. More stable running & Good spectrum compatibility

7. Seamless rate adaptation technology


Summary

Standard/

Features

Working

Frequency (Hz)

Upstream/Down-

stream rate (bps)

Transmit

Distance (km)

Step

(kbps)

ADSL 26–138 k

138–1.1 M

896 k/8196 k 5 32

ADSL2 26–138 k

138–1.1 M

1.2 M/12 M 5.2 4

ADSL2+ 26–138 k

138K–2.2 M

3 M/25 M 6.5 4

ADSL is widely used on the existing network. ADSL2 is

only a connecting point in technology development, so it

is rarely used for commercial purpose. Now, ADSL is

being upgraded to ADSL2+.


Questions

1. Briefly describe the three line coding technologies for ADSL

modulation & demodulation.

2. What new features does ADSL/ADSL2+ have?







Configuration Parameters of ADSL Service

This chapter chiefly describes the parameter in the ADSL line profile for

activating the ADSL port

ADSL transmission mode

Rate setting

Upstream/downstream channel bit swap

Trellis code

Channel mode

Noise margin

Signal attenuation



3.1 ADSL Transmission Mode

3.2 ADSL Rate Parameter

3.3 ADSL Stability Parameter


ADSL Transmission Mode

Customers use this parameter to choose a standard for activating

the ADSL line. The parameter corresponds to the T1.413 issue 2

presented by ANSI and the following standards by ITU : G.992.1,

G.992.2, G.992.3 (G.dmt.bis), G.992.4 and G.992.5 (G.dmt.bisplus).

The maximum downstream rate can be 8 Mbps or more in G.dmt

(G.992.1, G.992.3 and G.992.5) and T1.413, but only 1.5 Mbps in

G.lite. Therefore, G.dmt together with T1.413 is called full-rate

transmission mode.

In addition, ITU defines a specific handshake protocol G.994.1

(G.hs) for DSL, and G.dmt and G.lite use the protocol. Therefore,

G.dmt and G.lite are called G.hs mode.


Standard For Port in Negotiation

Mode Supported by CO Negotiated Mode of Line

All According to the mode supported by CPE, the port can be activated by any of the following

standards: G.dmt, G.dmt.bis, G.dmt.bisplus, G.lite and T1.413.

Full rate According to the mode supported by CPE, the port can be activated by any of the following

standards: G.dmt, G.dmt.bis and G.dmt.bisplus and T1.413.

G.lite According to the mode supported by CPE, the port can be activated by the G.lite standard.

T1.413 According to the mode supported by CPE, the port can be activated by the T1.413 standard.

G.dmt According to the mode supported by CPE, the port can be activated by any of the following

standards: G.dmt, G.dmt.bis and G.dmt.bisplus.

G.hs According to the mode supported by CPE, the port can be activated by any of the following

standards: G.dmt, G.dmt.bis, G.dmt.bisplus and G.lite.

G992.1 According to the mode supported by CPE, the port can be activated only by the G.dmt standard.

G992.2 According to the mode supported by CPE, the port can be activated only by the G.lite standard.

G992.3 According to the mode supported by CPE, the port can be activated by either the G.dmt standard or

the G.dmt.bis.

G992.4 According to the mode supported by CPE, the port can be activated only by the G.lite standard.

G992.5 According to the mode supported by CPE, the port can be activated only by the G.dmt.bisplus

standard.







Rate Parameters

Minimum transmit rate: It presents the minimum activation rate required in the current

direction after the line activation.

Maximum transmit rate: It presents the maximum activation rate in the current direction after

the line activation. If the rate is fixed, the maximum and the minimum activation rates must be

identical.

After the activation, the actual line rate will satisfy the activation requirement after being

adapted from the expected maximum rate to the minimum rate. Such an activation requires

that the error bit rate must be smaller than 10-7, and the noise margin must be around the

target noise margin.

During the ADSL connecting, if the line is in good conditions, and the calculated

downstream rate is bigger than the configured maximum rate, the system will restrict the

downstream rate to the maximum rate and increase the downstream SNR margin. If the line is

in poor conditions, and the calculated maximum downstream rate cannot satisfy the configured

maximum value, the system will set up the connection at the actual downstream rate on the

premise of guaranteeing the target downstream SNR margin.

Configure the upstream rate and the downstream rate in the same way.

Will you set parameters for rate? (y/n)[n]:Y


Low Upstream Rate Affecting Downstream Rate

[Fault Description]

The upstream rate is configured too low and causes the low

downstream rate.

[Troubleshooting]

Check the port parameter, and it is found that the upstream rate of the

ADSL port on the MA5100 is 64 kbps, and the downstream rate is 960

kbps. Change the upstream rate to 512 kbps, and the fault is

troubleshot.

[Fault Analysis]

As charging is involved, the downstream rate and the upstream rate

differ greatly. In application, however, if the upstream rate is lower than

128 kbps, such as 64 kbps, the downstream rate will be affected

seriously.

[Cause Analysis]

If an ADSL modem connects a large number of LAN subscribers, or

the subscriber uses many Internet services, a lot of TCP sessions will

occur. In this case, a multiple of TCP receivers send the ACK message

at a time and causes the upstream congestion or delay. As a result, the


Upstream/Downstream Channel Bit Swap

The bit swap function supports the bit distribution or the power adjustment between subbands

without line activation.

During the line activation, SNR and the bit allocation are calculated independently for each

subband. After the line activation, the line SNR may change for the external environment

account. Therefore, the line SNR change may be represented as that SNR increases on some

subbands and decreases on some others. If the state persists for a long time, the bit error rate

of the line may increase, or cannot satisfy the activation rate and requires the line to negotiate

again. If a subband SNR decreases too much and the subband cannot carry the allocated bits,

the bit swap functions to shift some bits of the subband to other subbands of high SNR for bit

swapping, such as the upstream/downstream channel bit swap.

Configure the bit swap as follows:

> Downstream channel bit swap 0-disable 1-enable (0–1) [1]:

> Upstream channel bit swap 0-disable 1-enable (0–1) [1]:







Trellis Coding

Trellis coding works out the best coding gain using a special coding calculation to

increase the line SNR gain. The practice proves that using trellis coding can increase

the line SNR gain by 3–6 dB at least, but the portion of the error control redundancy

code in the line bandwidth does not increase. The improvement is represented as that

the activation rate increases a lot compared with that in its failure case after the trellis

coding switch is enabled.

According to the ADSL standard (G.992.1), the trellis coding function is optional. At

present, all Huawei ADSL board series support this function. In the ADSL2/ADSL2+

standard (G.992.3/G.992.5), the trellis coding function is forcibly supported. Now,

Huawei ADSL2+ board series also support this function.

Enable or Disable the trellis function as follows:

> Trellions mode 0-disable 1-enable (0–1) [1]:


Channel Mode

There are two channel modes: interleaved mode and fast mode.

• Fast mode: This mode has short delay and general error correction

capability. So it applies to the delay-sensitive service.

• Interleaved mode: This mode can solve the burst noise and has a good

capability of correcting errors. The deeper the interleaved depth is, the

better the error correction capability is, and also the longer the delay is.

Therefore, the interleaved mode applies to the delay-insensitive service

that requires low reliability.

Unit of interleaved delay

• DMT: Use the depth as its unit directly, namely, the interleaved depth.

• MS: Use millisecond (ms) as its unit, namely, the interleaved delay.

Choose the channel mode:

> Please select channel mode 0-interleaved 1-fast (0–1) [0]:


Interleaving Principle

21 20 19 18 17 16 15

14 13 12 11 10 9 8

7 6 5 4 3 2 1

21 20 19 18 17 16 15

14 13 12 11 10 9 8

7 6 5 4 3 2 1

Enter the data from FEC

Read the data to

channels

Interleaving process

De-interleaving process

save the data

through channels

Read the

data to FEC

Depth

D=3

Span N=7

21……6, 5, 4, 3, 2, 1

……16, 9, 2, 15, 8, 1

21……6, 5, 4, 3, 2, 1

Object 1

Object 2

17

17

13

17

18

18

20

18

19

19

7

19

16

16

6

16

20

20

14

20

21 × 14 13 12 11 10 × 8 7 6 5 4 3 × 1

21 15 14 13 12 11 10 9 8 7 6 × × × 2 1 Receiving bit

(no interleaving)

× × ×

21 19 12 5 18 11 4 17 10 3 16 9 2 15 8 1 Bit order

(interleaving)

21 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

17

17

13

17

18

18

20

18

19

19

7

19

16

16

6

16

20

20

14

20

21 X 14 13 12 11 10 X 8 7 6 5 4 3 X 1

21 15 14 13 12 11 10 9 8 7 6 X X X 2 1

X X X Burst error

21 19 12 5 18 11 4 17 10 3 16 9 2 15 8 1

21 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Bit order

(no interleaving)

Receiving bit

(interleaving)


Improper Interleaved Depth Causing a Fault

[Fault Description]

The ADSL subscriber (PPPoEoA) on the MA5100 accesses the Internet after being authenticated on the

ISN8850. After the service is available, subscribers complain that they are often offline but can dialup to be

online soon after the fault.

[Troubleshooting]

1. By monitoring the end-user terminal, we found that the fault occurs, meanwhile, the modem is not deactivated.

2. Partial user terminals use the networking modem+HUB+PC. Therefore, we presume that the HUB is blocked

when a lot of data are switched due to the HUB performance. We replace the HUB, but the fault persists.

3. The fault may be traced to that the CPU utilization of the ISN8850 is too high. By checking, we found that the

CPU utilization is only 19%. It indicates that some other problems cause the fault.

4. After excluding the two possibilities, check the data configured on the MA5100. we found that the port works in

the interleaved mode and with the interleaved depth as 64. During monitoring the user terminal, we found that

the PING packet jitters regularly. Namely, a PING packet of long delay occurs every seven/eight stable PING

packets. In the PPPoEoA mode, the ISN8850 sends the PPP ECHO packets to the client software every 40

seconds to detect whether the PPP subscriber is online. If the ISN8850 has sent such a packet for three times

(two minutes) and got no response, it will disconnect the subscriber. Therefore, the fault may be traced to that

the interleaved depth is too big and causes the PPP ECHO packet sent by the ISN8850 lost, and the ISN8850

disconnects the subscriber. After the check and analysis, we change the interleaved depth parameter of the port

to 16, the condition is improved. Change the parameter to 8, and the fault is troubleshot.

[Causes Analysis]

Too deep interleaved depth causes long delay on network, furthermore, some data lost and the ISN8850 disconnects

the subscriber.


SNR/Noise Margin

The SNR margin refers to the additional noise that the system can tolerate on the premise of

guaranteeing the current rate and error bit rate. The SNR margin of the modem and the

stability of the ADSL connection are in direct ration. Generally, the bigger the SNR margin of

modem is, the more stable the connection is. Meanwhile, the SNR margin and the activated

physical connection rate are in inverse ratio. Namely, the bigger the SNR margin is, the lower

the activated physical connection rate is.

Target SNR Margin: It refers to the required noise margin for initialization when the bit error

rate equal to or smaller than 10-7.

Maximum SNR Margin: When the noise margin exceeds this value, ADSL must lower its

output power.

Minimum SNR Margin: When the noise margin is smaller than this value, ADSL must promote

its output power. If the promotion fails, ADSL should perform the negotiation again.

Set the SNR margin of modem as follows:

> Will you set SNR margin for modem? (y/n)[n]:y


Signal Attenuation

SATN refers to the signal attenuation. The SATN value is the ratio of the received

signal power at the receive end to the transmitted signal power at the transmit

end. In fact, SATN is the line attenuation parameter in ADSL, ranging from 0 to

102.2 dB with the step as 0.1 dB.

If the signal attenuates too much, the ADSL service will be unstable and

deactivated frequently. SATN can be caused by the following factors:

• Crosstalk

• Bridge connector reflection

• Line connector attenuation

• Line resistance attenuation


Locating the Line Fault Based on Channel Attenuation

[Fault Description]

The ADSL Internet service of an office is faulty. Several ports are frequently deactivated at the interval of

several hours, or sometimes the ports are deactivated automatically because of the line fault several

times every hour. The subscriber connecting to these ports are less than 500 m away from the

MA5100.

[Troubleshooting]

1. Run the related port command, and the channel attenuation is found to be too big on these port. The

channel attenuation of some of the ports is 24 dB upstream and 22 dB downstream, and that of some

other ports is 42 dB upstream and 20 dB downstream.

2. The parameter shows that the line connection is abnormal. Punching the wire down on MDF, and

connect the telephone wire again in the connection box. In this case, the line attenuation decreases to

a small value (less than 10 dB). After a test, it is found that the stability of subscriber connection is

promoted. The subscribers are offline only for once or twice within two days.

[Cause Analysis]

The channel attenuation and the distance between RTU and the MA5100 are in direct ratio but without the

simple linear relation. Nevertheless, if the distance increases by 100 m, the attenuation increases by 2

dB. In this faulty case, the subscriber is less than 500 m away from the MA5100, thus the attenuation

must be small in theory. But the attenuation is big in fact, it indicates that the signal attenuates at the

connection point but not on the copper wire. Therefore, during enabling the ADSL service, judge the

line connection status by checking the channel attenuation. If the actual attenuation is bigger than the

estimated one, the line is faulty because of either the non-standard cable or the poor connection of the

connector (this case occurs at the subscriber connection box and on MDF most of the time). Following

this way to locate the fault, improve the line condition and connection stability.


Parameter Reference Table

Downstream Upstream

Line Length Noise Margin Attenuation Rate Noise Margin Attenuation Rate

0 7 5.5 27232 7 9 1088

1000 6 9.5 25184 6 1.5 1120

2150 7 20 20832 7 23.5 1024

3050 7 30 9056 7 41.5 1056

4000 7 39 5472 7 54 992

5200 8 45.5 2496 7 63.5 896

6100 9 53.5 960 6 63.5 672

7000 12 61 192 6 63.5 416

The following table lists the test parameter value by using the MT880 (target noise

margin is 6). The table gives only the reference value of the line length, noise

margin, attenuation and rate. The result of the actual line test is a little worse than

the values.


This chapter describes the key parameters of the line profile and their

meanings. During configuring the line profile, inherit the default

value for most parameters. What requires change are the following

parameters: the activation standards used by the line profile,

interleaved/fast mode, upstream/downstream activation rate range.

Summary


Questions

1. What is the interleaved mode? Please describe the relation between the

interleaved depth and delay.

2. Which does the negotiation begin with, the high-rate mode G.992.5 or

the low-rate mode G.992.1 if CO (full compatible ) and CPE (full

compatible) work in the negotiation mode?







Three ADSL Problems

At present, ADSL often meets the following three problems:

• Subscribers are offline exceptionally.

• Subscribers access Internet at a low rate.

• Subscriber accounts are stolen.

Exceptional offline fault is usually traced to either of the following causes:

• PPP connection is faulty because of the loss of the Keep Alive packets that are based on the PPP

connection.

• Subscribers are offline forcibly because of the Radius packet loss.

Low rate for the access to Internet refers to that the port rate is not qualified to guarantee the

promised rate. According to the survey, the low rate is often caused by the poor line quality and the

unreasonable network architecture on access network.

If the subscriber account is shared, the account is stolen and the illegal subscriber is difficult to

track. This fault is traced to that telecom carriers do not limit and protect the broadband subscriber

account because they lack an effective mechanism to identify subscribers uniquely.


ADSL Trend

Broadband

ADSL ADSL2 ADSL2+ VDSL2+

Full-service

Support the IPTV, Triple Play, leased line, and some other

services.

Intelligent

Speed up the ADSL application, and locate the fault range

accurately to reduce the service interruption time.


Obtaining the Newest Documentation

The ADSL standardization begins with the regional standard, such as T1E1.4

(North America) and ETSIM6 (Europe). Later, ITU takes charge of the

regional ADSL standardization. This organization is a leader of the ADSL

standardization.

www.itu.int/ITU-T/ International Telecommunications Union-

Telecommunications sector (ITU-T)

www.dslforum.org/ ADSL Forum

www.t1.org/t1e1 ANSI T1E1.4 (North America)

http://www.itu.int/ITU-T/



http://www.dslforum.org/

http://www.t1.org/t1e1

www.huawei.com

Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.

GPON Fundamentals

Copyright © 2008Huawei Technologies Co., Ltd. All rights reserved. Page65

References

ITU-T 984.1

ITU-T 984.2

ITU-T 984.3

ITU-T 984.4


Objectives

Upon completion of this course, you will be able to:

Describe GPON Network Architecture

Outline GPON Basic Concepts

Outline GPON Applications


Contents

1. Overview of Optical Access Network

2. Basic Concepts of GPON

3. GPON Key Technologies

4. Basic Services over GPON Network


Contents






Center Office

Curb

Customer Premise Equipment

FTTC

Architecture of Optical Access Network

3.5-5km

Remote Business xDSL 2~20Mbps

ODN

2.5Gbps Down /1.25Gbps Up

FTTH

ONT


OLT

OLT

FTTB

ONU


OLT

DSLAM

DSLAM


What is Optical Access Network?

From the architecture diagram, the optical access network comprises the

following scenarios:

FTTB scenario

SBU : Single business unit ; providing a comparatively small number of ports such as POTS,

10/100/1000BASE-T and DS1/T1/E1 ports

MTU :Business Multi-tenant unit ; providing a comparatively larger number of ports,

including POTS, 10/100/1000BASE-T and DS1/T1/E1 ports.

FTTC & FTTCab scenario

MDU : Multi-dwelling unit ;providing a comparatively larger number of ports, including

10/100/1000BASE-T, VDSL2, and so on.

FTTH scenario

SFU : Single family unit , providing a comparatively small number of ports, including following

types: POTS, 10/100/1000BASE-T, and RF.


Contents






What is GPON?

GPON: Gigabit-capable Passive Optical Network

PON is short for Passive Optical Network ;

GPON architecture: Passive optical network featuring one-to-multiple-point;

Optical Line Terminal (OLT)

Optical Network Unit (ONU)

Optical Distribution Network (ODN).

Passive Optical Splitter

Optical Network Unit

Passive Optical Network

Optical Line Terminal

Optical Network Termination

. .

. . .

.

. .

. . .

. PSTN

Internet

IPTV


Why GPON?

GPON supports :

Triple-play service

HDTV: 16-20M/program;

Data: 10M;

Video Conference: 4.5M

GPON is the choice of large carriers in the international market.

<1Mbps 3M 8M 25M 2.5G

ADSL/ADSL2+

Copper Based

VDSL / ADSL2+

Copper Based

PON

Fiber Based

2002 2003 2006 2010

Time

Internet

Video conference

Remote control

Access

Technology

Service

requirements

VoD

HDTV

Game

Live TV

VoD

HDTV

<3km <2km <1km ~20km Coverage

diameter

High-bandwidth up to 1.25Gbps/2.5Gbps Long-reach up to 20km


GPON Principle----Data Multiplexing

GPON adopts Wavelength Division Multiplexing (WDM) technology,

facilitating bi-direction communication over a single fiber.

To separate upstream/downstream signals of multiple users over a single fiber,

GPON adopts two multiplexing mechanisms:

In downstream direction, data packets are transmitted in a broadcast manner;

In upstream direction, data packets are transmitted in a TDMA manner

OLT

ONU/ONT

1490nm

1310nm

ODN


GPON Principle----Downstream

Broadcast mode

1 2 3 1 2 3

1

2

3

Data for specified ONU

Data for specified ONU


GPON Principle----Upstream

TDMA (Time Division Multiplex Access) mode

1 2 3 2

1

2

3

Data from specified ONU

Data from specified user


Basic Performance Parameters

Data Rate

(Upstream/Downstream

Gbps)

1.24416/

2.48832

Maximum physical reach 20 km

Maximum differential

fibre Distance

20 km

Split ratio 1：64/up to1：128

The distance

between nearest

and farthest

ONTs


WDM

ONU/ONT

NE

WDM

OLT

NE

Service node

Optical

splitter

T reference point V reference point

R/S S/R ODN UNI SNI

IFpon IFpon WDM

ONU/ONT

GPON Network Model Reference

ONU Optical Network Unit

ONT Optical Network Terminal

ODN Optical Distribution Network

OLT Optical Line Terminal

WDM Wavelength Division Multiplex Module

NE Network Element

SNI Service Node Interface

UNI User Network Interface


IFpon

O

N

U

O

N

U

O

N

U

T-CONT Port

T-CONT

Port

Port

T-CONT

T-CONT

Port

Port

Port

Port

Port

ONU-ID

identifies ONUs

Alloc-IDs identifies

T-CONTs

Port-ID

identifies GEM

ports

GPON Multiplexing Architecture GEM Port: the minimum unit for carrying

services.

T-CONT: Transmission Containers is a kind of

buffer that carries services. It is mainly used to

transmit upstream data units. T-CONT is

introduced to realize the dynamic bandwidth

assignment of the upstream bandwidth, so as to

enhance the utilization of the line.

IF pon: GPON interface.

Based on the mapping scheme, service traffic is

carried to different GEM ports and then to

different T-CONTs. The mapping between the

GEM port and the T-CONT is flexible. A GEM port

can correspond to a T-CONT; or multiple GEM

Ports can correspond to the same T-CONT.

A GPON interface of an ONU contains one or

multiple T-CONTs.


GPON Multiplexing Architecture

OLT ONT

T-CONT

T-CONT

GEM Port GEM Port

Classi-fication

UNI

IF-PON

ONUOLT

Classi-fication

IF-PON

QoS/Forward

SNI

Optical Fiber

flowVirtual

UNI

T-CONTGEM portGEM port


TDM/E1 TDM/E1 data Payload

TDM fragment

HEC

PTI

Port ID

PLI

GEM Frame

Ingress buffer

TDM Buffer

Mapping of TDM Service in GPON

TDM frames are buffered and queued as they arrive, then TDM data is multiplexed

in to fixed-length GEM frames for transmission.

This scheme does not vary TDM services but transmit TDM services transparently.

Featuring fixed length, GEM frames benefits the transmission of TDM services


GEM

Payload

CRC

PTI

Port ID

PLI

GEM Frame Ethernet Packet

DA

SFD

Preamble

Inter packet gap

SA

Length\Type

MAC client data

FEC

EOF

5 bytes

Mapping of Ethernet Service in GPON

GPON system resolves Ethernet frames and then directly maps the data of frames

into the GEM Payload.

GEM frames automatically encapsulate header information.

Mapping format is clear and it is easy for devices to support this mapping. It also

boasts good compatibility.


Contents


2. Basic Concepts of PON




GPON Key Technologies

T-CONT

Attenuation


T-CONT Bandwidth Terms Transmission Containers (T-CONTs): it dynamically receives grants delivered by OLT. T-CONTs are used

for the management of upstream bandwidth allocation in the PON section of the Transmission

Convergence layer. T-CONTs are primarily used to improve the upstream bandwidth use on the PON.

T-CONT BW type falls into FB, AB, NAB, and BE.

Five T-CONT types: Type1, Type2, Type3, Type4, and Type5.


Fibre Attenuation and Power Budget

Fiber attenuation relates to the fibre length

The attenuation of fibre splicing point is

generally less than 0.2dB

Other factors may cause attenuation, such

as fibre bending

About 0.35 dB per km

for 1310,1490nm

Huawei’s OLT and ONU

28 dB (Class B+)

Table G.984.2 – Classes for optical path loss

Class A Class B Class B

＋

Class C

Minimum loss 5 dB 10 dB 13 dB 15 dB

Maximum loss 20 dB 25 dB 28 dB 30 dB

NOTE – The requirements of a particular class may be more

stringent for one system type than for another, e.g. the class C

attenuation range is inherently more stringent for TCM systems

due to the use of a 1:2 splitter/combiner at each side of the ODN,

each having a loss of about 3 dB.


Items Unit Single fibre

OLT: OLT

Mean launched power MIN dBm +1.5

Mean launched power MAX dBm 5

Minimum sensitivity dBm -28

Minimum overload dBm -8

ONU: ONU

Mean launched power MIN dBm 0.5

Mean launched power MAX dBm 5

Minimum sensitivity dBm -27

Minimum overload dBm -8

Parameters of GPON (Class B+)


Contents


2. Basic Concepts of PON




GPON Service Provisioning Carriers’ nightmare

Application scenario

Service Provisioning

NMS 2000

Access Network

Billing

1 Subscribe for services

2 Configure service network

3

Order Management

Start up ONT and make registration with serial number ONT ONT

ONT ONT

CRM

User

Send terminals to users

1

2

Finish the auto-configuration of OLT

Initial configurations (such as service system information

configuration, data configuration) are required on

terminals and then they can be put into use. To finish these

configurations, it is not cost-effective to carriers.

GPON supports zero configuration on terminals

and plug-and-play of terminals, which is cost-

effective.

Flexible Configuration plan of GPON

STB

3

Use OMCI to finishing data configuration on ONT


Triple Play Solution in GPON

BRAS AAA Server

IP Core

ASP/ISP CPE

Firewall

Ethernet

OLT

Softswitch

Intern

et

VoD

Server Middle ware

NMS

TL1/CORBA

/API

BB service platform

Carrier’s OSS

Notification

IPTV

Phone

PC

SFU

Phone

PC SBU

CPE MDU

NSP

IP

Voice

CBU

E1

FE

ODN

Splitter


Questions

GPON network architecture?

Describe GPON service provisioning?


Summary

In this presentation, we introduced GPON basic

concept ,architecture ,and principle.

We also discussed about GPON service provisioning and

application.

www.huawei.com


47pt

30pt

反白

:

FrutigerNext LT Medium

: Arial

47pt

黑体

28pt

反白

细黑体

FTTx System Overview


35pt

32pt

) :18pt

Contents

1. FTTx Network Introduction

2. FTTx Hardware Description

3. FTTx Solutions Overview

Page94


35pt

32pt

) :18pt

FTTx Overview

An FTTx solution is a unified full-service access solution

based on the T-bit optical access platform and aiming at

the ALL IP network architecture.

FTTx solutions, which cover FTTH, FTTB, FTTC, and FTTO

buildup scenarios, provide full-service access including

mobile base station backhaul that have high-reliability,

high-bandwidth, and high-security features.

Page95


35pt

32pt

) :18pt

FTTx Solution-Major Services

FTTx solutions provide multiple access services in different scenarios,

mainly including high-bandwidth IPTV service, open access network

(OAN) access of wholesale service mode, high-rate Internet access

service, and the private line access service of the enterprise and cell

cite.

Major Services Provided by an FTTx V1R6 Solution

50M@HDTV Service

Open Access

Enterprise Access Service

Cell Site Access Service

Page96


35pt

32pt

) :18pt

FTTx Solution-network application

Page98


35pt

32pt

) :18pt

FTTx Solution-Products

Page99

Integrated management

All the GPON series products can be management by iManager N2000 /U2000 unified NMS

CO Curb Building Home

•Medium

xPON uplink

MSAN •Large

OLT

•Mini

OLT

•Medium

xPON uplink

DSLAM

•xDSL+POTS

MDU

•LAN+POTS

MDU

•Outdoor

cabinet

•stair well

box

•FE HG

•FE+POTS

HG

•FE+POTS+

WLAN HG

•Outdoor

HG

•Medium

OLT

OLT MxU ONT


35pt

32pt

) :18pt

Questions

Page100

Which scenarios can FTTx network support?

What are the main services FTTx network supports?


35pt

32pt

) :18pt

Contents


2. FTTx V1R6 Hardware Description

2.1 Involved Equipment

2.2 OLT

2.3 MxU

2.4 ONT

3. FTTx V1R6 Solutions Overview

Page101


35pt

32pt

) :18pt

Page102

Involved Equipment

In an FTTx solution, the OLT, MDU, SBU, CBU, and ONT are fit together to network.

SCENE OLT MDU/SBU/CBU ONT

FTTH MA5600T/MA5603T -

GPON ONT： HG810、HG813、HG863、HG850a、HG866、HG865、HG8240、HG8245、HG8247、HG8010、HG8120、HG8120R、HG8240R、HG8110、HG8242 EPON ONT： HG810e、HG813e、HG850e、HG866e、HG8240、HG8245、HG8247、HG8010、HG8120、HG8120R、HG8240R、HG8110

FTTB/C MA5600T/MA5603T

MA5620/MA5626 MA5612 MA5616 MA5652

FTTO MA5600T/MA5603T MA5612 MA5616 MA5620/MA5626

Cell Site Access MA5600T/MA5603T MA5612、MA5628 -

Opticable MA5600T/MA5603T EOC head end device：MA5631

EOC terminal：HG7022/HG7042

-

electricity system MA5600T/MA5603T MA5621 -


35pt

32pt

) :18pt

Contents


2. FTTx V1R6 Hardware Description


2.2 OLT

2.3 MxU

2.4 ONT

3. FTTx V1R6 Solutions Overview

Page103


35pt

32pt

) :18pt

MA5600T/MA5603T

MA5600T Large capacity:

Dimensions of plug-in subrack: 530 mm x 275.8 mm x 447.2 mm (W x D x H)

2 slots for control boards, 16 slots for service boards and 2 upstream slots

Backplane capacity: 3.2 Tbit/s

Processing capacity of each slot: 20 Gbit/s

The bandwidth between each control board and each upstream interface board: 40 Gbit/s

The working mode for control board: active/standby mode

MA5603T Medium capacity:

Dimensions of plug-in frame: 442 mm x 283.2 mm x 263.9 mm (W x D x H the mounting ear is not included)

2 slots for control boards, 6 slots for service boards and 2 slots for upstream boards

Backplane capacity: 1.5 Tbit/s

Processing capacity of each slot: 10 Gbit/s

The working mode for control board: active/standby mode

MA5600T and MA5603T use the same software and hardware platforms, and the O&M cost is reduced.


35pt

32pt

) :18pt

MA5600T Service Subrack

Slots for universal interface boards:

support the clock interface board

and universal interface board

Slots for upstream interface boards:

support GE optical or electrical port

and 10 GE optical ports

Two service subracks: 21-inch and 19-inch. The 21-inch subrack has 2 more slots on the service board than the 19-inch subrack.

The 21-inch subrack is widely used in oversea markets. It provides OLT, MSAN and DSLAM plug-in frames. 19-inch subrack of R010 version and later versions is available on the oversea MSAN/DSLAM scenario.

The OLT seldom use the 19-inch subrack in oversea markets.

Slots for control boards: support

active/standby board protection

Power interface board:

supports dual-board protection

Fan Tray

Description of MA5600T service subrack

21-inch subrack 19-inch subrack


35pt

32pt

) :18pt

MA5603T Service Subrack

• MA5603T service subrack provides the integrated optical-

copper access platform and the access of PON, MSAN and

DSLAM services.

1+1 redundancy design:

Power boards

Upstream interface boards

Control boards

Slots for

active/standby

control boards

Slots for active/standby

upstream interface boards

Slots for active/standby

power boards Slots for universal interface boards

Slo

ts fo

r se

rvic

e b

oa

rds


35pt

32pt

) :18pt

Splitter Subrack of MA5600T

ETSI SPL subrack

There are 20 slots on the ETSI SPL. They are fixed on the

cabinet through the mounting ear.

Dimensions (mounting ears included): 530 mm x 235 mm x

397.2 mm (W x D x H)

Dimensions (mounting ears excluded): 490 mm x 235 mm x

397.2 mm (W x D x H)

ETSI SPL subrack separates VDSL2/ADSL2+ signals from

POTS/ISDN signals by configuring SPL board.

A service subrack and a splitter subrack can be installed on

the 2.2 m indoor cabinet.

ETSI SPL subrack


35pt

32pt

) :18pt

Control Board

SCUB

Implements the access of copper cables

and supports following functions: POTS and xDSL access modes 48 Gbit/s switching capacity GE channel to the service board Active and standby switchover Environmental monitoring parameters 4 SFP GE upstream optical ports

Introduction to SCUB

M2XA: is installed only on the SCUN, supports 512K MAC addresses and functions of CKMC.

CKMC: implements the 1588 V2 clock processing function. and provides stratum-3 clock for the

system; implements the VoIP logic forwarding function.

FLBA: implements the VoIP logic forwarding function.

Introduction to Daughter Board

S

C

U

B

V

o

i

c

e

x

D

S

L

SCUN

S

C

U

N

G

P

O

N

P

2

P

V

D

S

L

50 M bps

GE/FE

GPON

Is an integrated optical-copper control board

that supports following functions: Full service access and the access of xPON,

P2P, POTS, and xDSL Active and standby switchover GE or 10GE channel to the service board Environmental monitoring parameters 4 SFP GE upstream optical ports

Introduction to SCUN


35pt

32pt

) :18pt

GPBD Board — 8-port GPON OLT Interface Board

Enlarging the

system capacity

Increasing the

transmission reach

Decreasing system

power consumption

Improving QoS

Supports eight GPON ports and split ratio of 1:128 (Class C+).

Supports 16 boards for a cabinet and up to 8K users.

Supports SFP optical module of Class B+/Class C+.

Class C+ optical module provides 32 db optical power budget and a maximum of 60

km transmission reach.

Supports various traffic classifications on the user side: CVLAN, CVLAN+1p and

CVLAN+Ethertype. Supports two rate three color marker (trTCM) and two working modes: green

marker priority and higher priority.

Uses an ASIC chip to lower the power consumption (51 W).

Supports the manual shutdown of idle PON ports to prevent power waste.

Optimizing

bandwidth allocation

Supports 1K T-CONT/PON ports and accurate bandwidth control.

Supports two bandwidth allocation modes for low delay and high bandwidth utilization.

GPBD Promoting the

O&M efficiency

Supports the OPM function which works with N2510 to monitor the temperature,

voltage, current, receiving optical power and transmitting optical power of PON ports,

and to analyze status of optical lines and quickly identify faults of the optical lines.

S

C

U

N

GIU

G

IU

G

P

B

D

ONT IP/MPLS BRAS

NGN/IMS

EMS

GE/10GE


35pt

32pt

) :18pt

EPBD Service Board — 8 EPON Boards

EPBD

S

C

U

N

GIU

G

IU

E

P

B

D

ONT IP/MPLS BRAS

NGN/IMS

EMS

GE/10GE

Supports the following specifications:

A maximum of 8 EPON ports

Pluggable optical modules

A maximum of 1: 64 split ratio

Forward error correction function in both upstream and downstream directions and

enabling/disabling of FEC on the ONT

CTC triple-churning encryption in the downstream direction. The encryption key is

timed updated, and the time can be set.

Dynamic bandwidth allocation function (DBA). A DBA profile can be bound to an ONT.

Fault diagnosis function including various alarm detections and loopback diagnostic

functions for EPON network.

Dying gasp alarm

Major Specification


35pt

32pt

) :18pt

POTS Service Board

H808ASPB

IP/MPLS BRAS

Softswitch

EMS

GE/10GE

S

C

U

N

GIU

G

IU

A

S

P

B

Phone

Phone

Twisted pair

64-channel built-in DSP and 1:1 non-convergence for

online users

Multiple working modes: common user, 12/16 KC, and

polarity reverse

Built-in MELT function for high test accuracy

Short loop that automatically decreases the working

voltage from 48 V to 36 V within 3 km access reach

Board power consumption (short loop in all off-hook):

70.8 W

Major Specification


35pt

32pt

) :18pt

ISDN BRI Service Board

DSRD

IP/MPLS BRAS

Softswitch

EMS

GE/10GE

S

C

U

N

GIU

G

IU

D

S

R

D

ISDN Phone

ISDN Phone

Twisted pair

The DSRE and DSRD have the same panel but different silkscreens.

Each supports the 32-channel BRA.

The DSRD uses the 2B1Q encoding mode, and the DSRE uses the

4B3T encoding mode. (2B1Q encoding mode is the standard in North

America which is currently widely used in other areas including

China; a few countries in Europe use 4B3T encoding mode.)

The remote supply of ports is supported.

The point-to-point and point-to-multipoint working modes are

supported.

The long-time active working mode is supported

Major Specification


35pt

32pt

) :18pt

EDTB Service Board

EDTB

IP/MPLS

EMS

GE/10GE

S

C

U

N

GIU

G

IU

E

D

T

B

TDM SHDSL Modem

TDM SHDSL Modem

E

D

T

B

DDN E1

PBX E1

Supports the following functions:

Access services of 16 channels of TDM SHDSL and 16 channels of E1

Transparent transmission and aggregation of E1 over SHDSL services

TDM PWE3 service (The EDTB must work with the SPUB board)

Transmission distance of 16 channels of E1 on the EDTB board

V.35 port access on the CPE

512 DSP channels, VoIP function, and PRI-to-H.248 signaling conversion by

using the IUA protocol

Impedance: 75 Ω or 120 Ω

Major Specification


35pt

32pt

) :18pt

ADSL2+ Service Boards

ADKM ADPD ADPE

IP/MPLS BRAS

Softswitch

EMS

GE/10GE

S

C

U

N

GIU

G

IU

A

D

x

x

AD Modem

AD Modem

Twisted pair

ADKM is a 64-port of ADSL2 service board. It supports SELT, MELT and

DELT tests and Annex B and J. (used by DT)

ADPE is a 64-port ADSL2+ over POTS service board. It features the highest

density in the industry with the built-in 600-ohm splitter. It supports G.INP

physical layer retransmission and Annex A, L, and M.

ADPD is a 64-port ADSL2+ over POTS service board. It supports SELT and

DELT tests.

The preceding ADSL2+ service boards support the following functions:

Two-pair ADSL2+ Bonding on the chipset

Port protection

Over-temperature protection

Automatic shutdown of broadband services for energy saving

Major Specification


35pt

32pt

) :18pt

VDSL2 Service Boards

VDMF VDPE VDPM

IP/MPLS BRAS

Softswitch

EMS

GE/10GE

S

C

U

N

GIU

G

IU

V

D

x

x

VD Modem

VD Modem

Twisted

pair

VDJM

VDMF is a 48-port VDSL2 over POTS service board. It supports SELT and DELT

tests and G.INP physical layer retransmission (V800R009). VDPE is a 64-port VDSL2 over POTS service board with built-in splitter. It

supports SELT and DELT tests and G.INP physical layer retransmission

(V800R009). VDPM is a 64-port VDSL2 over POTS service board. It supports SELT, DELT and

MELT tests and G.INP physical layer retransmission (V800R009). VDJM is a 48-VDSL2 over POTS service board. It supports SELT, DELT and

MELT tests (used by DT). VDPE and VDPM work with the SCUN control board to provide a non-blocking

50 Mbit/s bandwidth for a user. The preceding boards support the following functions: Compatible with ADSL,2+, configuration of various spectrum profiles, including

8a, 8b, 8c, 8d, 12a, 12b and 17a (8a, 8b, 8c and 8d support 2-wire bonding.) ATM and PTM encapsulation modes Port protection and over-temperature protection Automatic shutdown of broadband services for energy saving

Major Specification


35pt

32pt

) :18pt

ADSL2+ Combo Service Board

H80BCAME

IP/MPLS BRAS

Softswitch

EMS

GE/10GE

S

C

U

N

GIU

G

IU

C

A

M

E AD Modem Splitter

Phone

Home

The Combo board features the highest density in the industry with a built-in 600-ohm

splitter. It provides 48-channel ADSL2+ over POTS port. It supports the following functions: 64-channel built-in DSP and 1:1 non-convergence for online users Various transmission modes: Annex A, Annex L, and Annex M (Annex B and Annex J are

not supported) Built-in MELT for easy fault locating G.INP physical layer retransmission

Major Specification

Increasing the

density and saving

the space

Decrease the TCO Conserving energy

MDF COMBO

Facilitating the project installation.

Saving 2/3 MDF occupation

Decreasing 30% power consumption

Static power: 33.5 W Typical power: 55.7 W

Before COMBO

30%


35pt

32pt

) :18pt

ATM Interface Unit Board — AIUG Board

AIUG

ATM

network

IP Core

EMS

GE/10GE

S

C

U

N

GIU

G

IU

A

I

U

G ATM DSLAM

STM-1

STM-1

The AIUG board is the ATM interface unit board. The board connects to the ATM-

DSLAM devices in the downstream direction, and also provides the ATM and IP

private services.

The board supports the following functions:

4 ATM optical ports (STM-1)

ATM subtending upstream transmission (ATM PWE3) through a private line

Major Specification

H80102CS: supports two ATM optical ports.



35pt

32pt

) :18pt

G. SHDSL Board — SHLM Service Board

SHLM

IP Core

EMS

GE/10GE

S

C

U

N

GIU

G

IU

S

H

L

M Modem

ATM SHDSL

EFM

SHDSL

Modem

The SHDA board is a 16-port ATM SHDSL service

board that provides 16-channels of SHDSL services.

The SHLM board supports the following functions: SHDSL.bis access services in the ATM mode and

SDHSL access services in the EFM mode M-pairs, EFM, EFM bonding and IMA bonding MELT function Different working modes based on ports

Major Specification


35pt

32pt

) :18pt

Multi-GE Uplink Interface Board — SPUA

Service Processing Board

Provides eight GE ports and two 10GE ports. Supports SFP interface: GE optical/electrical ports and 10GE

optical port.

Abundant

ports

Functions as an upstream board or cascading board. Provides the inter-board protection and the aggregation in upstream

transmission or cascading; supports 1:1 active/standby aggregation.

Supports 20G line rate forwarding (256-byte packets) and 10

Mbit/s PPS processing capability. Supports Ethernet clock synchronization. Provides hierarchical QoS (HQoS) to ensure fair bandwidth

scheduling for content providers (CPs).

Positioning

High-end subscribers

S

C

U

P R T E

B

I

U

A

FAN

10 17 18 16 15 14 13 12 11 9 8 2 7 6 5 4 3 0 1 19

P R T E

IP/MPLS

Core

PE

S

P

U

A

4GE LAG

4GE LAG

S

P

U

A

S

P

U

A

LAN

Switch

2GE LAG

2GE LAG

DSLAM

S

P

U

A

…

S

C

U

X2

CS

X

2C

S

40GE Uplink

SPUA

High

reliability

Powerful

functions


35pt

32pt

) :18pt

Multi-GE Uplink Interface Board — ETHB Board

Supports GE/10GE on the interfaces to the Control Board.

Supports eight SFP GE optical module or electrical ports.

Functions as an upstream board or cascading board.

Provides inter-board protection and aggregation; supports load

sharing and redundancy protection.

Supports 1:1 active/standby aggregation.

Supports smart link.

ETHB

Positioning

Common users

S

C

U

P R T E

B

I

U

A

FAN

10 17 18 16 15 14 13 12 11 9 8 2 7 6 5 4 3 0 1 19

P R T E

IP/MPLS

Core

PE

E

T

H

B

4GE LAG

4GE LAG

E

T

H

B

E

T

H

B

LAN

Switch

2GE LAG

2GE LAG

DSLAM

E

T

H

B

…

S

C

U

X2

CS

X

2C

S

40GE Uplink

High

reliability

Abundant

ports


35pt

32pt

) :18pt

TDM Service Board — TOPA Board

TOPA

STM-1

SDH/DDN

S

C

U

N

G

P

B

D

T

O

P

A

E1 GPON

network

The TOPA board is a native time division multiplexing (TDM) uplink interface board and

uses the daughter board to transmit services upstream.

In the upstream direction, the GE signals from the backplane are converted into the TDM

frames. Then the TDM frames are transmitted upstream.

In the downstream direction, the signals from TDM lines are converted into GE packets.

Then the GE packets are transmitted to corresponding service boards through control

boards

Major Specification

H801NH1A transmits 8 TDM signals upstream through the E1 port and implements the

native TDM function. H801EH1A transmits 8 TDM signals upstream and implements the CESoP function.

(currently, EH1A only supports the SATOP function.) H801NH1A transmits 1 TDM signal upstream through the STM-1 port and implements the

native TDM function. H801EH1A transmits 1 TDM signals upstream and implements the CESoP function.

(currently, CSSA only supports the SATOP function.)



35pt

32pt

) :18pt

OPGD Board — High-Density P2P and

Cascading Board

Flexible

application

Highest

density

in the

industry

Supports 48 channels of GE access services for one board; support 768

GE ports on one subrack (The board supports only one subrack on one

cabinet in full configuration.).

Supports pluggable single-fiber and two-fiber SFP optical modules

The maximum power consumption is 100 W.

Supports P2P access services.

Supports MxU/DSLAM/CBU cascading accesses (OPGD cannot

function as an upstream board).

Sets the working mode based on the board: P2P or cascading.

Large

service

Capacity

Supports the synchronous Ethernet (only GE ports support the

synchronous Ethernet.)

Supports intra-board and inter-board port aggregations.

Supports the VLAN-based bridging at layer 2.

IP/MPLS BRAS

NGN/IMS

EMS

GE/10GE

S

C

U

N

GIU

G

IU

O

P

G

D

O

P

G

D

O

P

G

D

LAG DSLA

M

P2P ONT

GE

OPGD


35pt

32pt

) :18pt

SPUB — MPLS Service Board

S

C

U

N

GIU

G

IU

S

P

U

B

G

P

B

D

ONT

PW

The SPUB board does not provide any port on this front panel. After traffic streams are

forwarded to the SPUB board from the SCU control board, the SPUB board adds MPLS

labels to the traffic streams and forwards these traffic streams back to the SCU control

board. After that, the SCU control board forwards the traffic streams to the upstream port.

SPUB

Supports the following functions: TDM PWE3/ETH PWE3/ATM PWE3 and also the E2E VPN services LSP and PW protection and MPLS OAM MPLS-based E2E QoS Functioning as a Provider (device on the MPLS core network) and provider edge (device at the

edge on the MPLS network) Board-level active/standby protection, with the service interruption time shorter than 50 ms. The

active and standby SPUB boards must reside in adjacent slots. A maximum of two SPUB boards in the system.

Major Specification


35pt

32pt

) :18pt

CSPA Board — CESoP Service Board

MA5600T

BTS

E1

ONT

PTN

ONT

E1

S

C

U

G

P

B

C

S

C

U

S

C

U

C

S

P

A

SS

C

U

PTN网关 BSCODN S

P

U

B

G

P

B

D

G

I

U

G

I

U

In the upstream direction, the ONU implements the GEM encapsulation to E1 and

then transmits the E1 to the CSPA board. The CSPA board encapsulates the

TDMoGEM frame into the E1 data. Then, the CSPA board encapsulates the E1

data to SAToP data, which is then encapsulated by the SPU board into MPLS

packets and then forwarded to the PTN device. The process in the downstream

direction is reverse to that in the upstream direction.

CSPA

Converts from native TDM into SAToP; does not provide ports on the front panel.

Supports only the unstructured encapsulation; does not support the structured

encapsulation.

Supports the SAToP processing of 64 channels of E1 signals; transmits the clock

signals recovered from one of the E1 to the control board.

Supports 2K TDM connections.

Supports board-level active/standby protection, with the service interruption time

shorter than 50 ms. The active and standby SPUB boards must reside in adjacent slots.

Major Specification


35pt

32pt

) :18pt

Uplink Interface Board and Universal Interface

Board

GICD: four GE upstream or subtending

optical ports.

GICE: four GE upstream or subtending

electrical ports.

GICF: two GE upstream or subtending

optical ports.

GICK: supports the following

specifications and functions: Two optical/electrical upstream or

subtending ports Ethernet clock synchronization Compliance with IEEE1588 V2

GSCA: four optical/electrical GE ports. It

supports the Ethernet clock

synchronization.

X2CA: 2-port 10GE optical interface unit board

X2CS: 2-port 10GE uplink interface card. It

supports 10GE synchronization Ethernet.

CITD: universal interface board. It supports

the following specifications: Seven inputs of alarm digital parameters and

one output of digital controlling parameters Two inputs of 2 Mbit/s or 2 MHz BITS clock

signals and one output of 2 Mbit/s or 2 MHz

clock signals (The BIUA board needs to

support this output.)

PRTE: power interface board. It supports the

following specifications: One -48 V power input Fault detection and report Under-voltage detection and detection of

whether the input power exists

P2CA: 2-port xPON upstream board on the

MA5603T

GICG: two GE upstream or subtending

electrical ports.


35pt

32pt

) :18pt

Questions

How many types of OLT?

What are the differences between GPBC and GPBD?

Which service board can deal with E1 service?

Page126


35pt

32pt

) :18pt

Contents




2.2 OLT

2.3 MxU

2.4 ONT


Page127


35pt

32pt

) :18pt

Page 128

MxU Series

FTTB LAN FTTB/C DSL FTTO/FTTM Electrical Power

Solutions

MA5616: •XPON/GE •256POTS/128ADSL2+/96VDSL2/64G.SHDSL/32ISDN

MA5652 •GPON •16VDSL2

MA5610 ： •XPON/GE •256POTS/64LAN

MA5612: •XPON/GE •48POTS/2GE+22FE/8E1/RF

MA5620&MA5626 •XPON/GE •8/16/24FE+8/16/24POTS •8FE •4GE+4FE（POE）

MA5628 •XPON/GE •4GE/FE+4E1

MA5612: •XPON/GE •48POTS/2GE+22FE/8E1/RF

End V800R309C00.

MA5621 •XPON •4GE/FE+4 RS232/RS485

EOC

MA5631 •XPON •4 Cable

MA5662 •GPON/GE •48 VDSL2

HG7022/7042ON •1 Cable input interface •1 TV output interface

HG7022(2FE) / HG7042(4FE)


35pt

32pt

) :18pt

Page 129

MA5616 Specification

Service board, 4pcs

Control

board, 1pcs

Power board, 1pcs

Fan tray

Mounting bracket

PDIA: DC power board

PAIA: AC power board

PAIB: AC power board with power backup

CCUB, with 2GE/2GPON

FCBA: FAN monitoring

board

19”2U


35pt

32pt

) :18pt

Page 130

MA5616 Highlights: high-density, full-services

GPON/EPON

OLT

Type C Type C

IMS/SS

Internet

RNC

CS

ISDN

POTS

LAN POTS

PC

DSL

P2P

ADLE 32 ADSL2+ with splitter

VDGE 16 VDSL2 (30a) with splitter, over POTS

VDSE 24 VDSL2 (17a)

VDSH no splitter, over POTS

VDTH no splitter, over ISDN

CALE 32 ADSL2+ Combo ADSL2+ plus POTS

ASRB 32 POTS

ASPB 64 POTS

DSLD 8 ISDN

SHLH 16 SHDSL

EIUD P2P 4GE(Combo) + 4FE

EIUA 16 FE


35pt

32pt

) :18pt

Page 131

MA5616 Highlights: Combo Card

Three in one

32 ADSL 32 SPL 32 POTS Provide POTS and ADSL2+

One board provides 32 ports

Splitter is built-in

What is Combo?

Requirement

•1.The proportion of Broadband and VOIP is 1:1 •2.How to save space of site •3.How to reduce complexity of

cables

COMBO NO COMBO

MDF ONU (COMBO)

MDF

POTS

ADSL

One card support Broadband and VOIP services.

Without COMBO With COMBO

One user cable Three user cables


35pt

32pt

) :18pt

Page 132

MA5616 Highlights: Power Backup and Remote Power

Main

control

module

MA5616: AC+ Power Backup

AC

Accumulator

management

Accumulator

-48V 220V AC input

- 48V DC input

Device NM

EMS

Available to monitor accumulator status of recharge or discharge

Available to report battery abnormal status alarm to NM

Available to inquire about MA5616 battery status

Available to differentiate whether AC or battery is used

• DC back up resources exist

Copper Pair End User Remote Site

Underground

enclosure

Central Office

xDSL

RFT-V or RFT-C

48VDC

CPE

Small Business

or Home

GPON MDU

Outdoor Unit

AC/DC

Rectifier

Turning your

copper into

gold!

Outdoor Street Cabinet

Provide the power with Free copper pairs

Remote power ---- Enabling power supply available anywhere


35pt

32pt

) :18pt

Page 133

MA5620 & MA5626 Specification

Type Pizza Box

Dimensions WxDxH: 442mm×220mm×43.6mm

250mm×185mm×43mm (8ports)

Temperature -40 ℃ ~ + 55 ℃

Uplink 2 Port SFP, optional GPON or GE

Uplink

protection

GPON Type C, MSTP

Type 24FE + 24POTS/16FE +

16POTS/24FE/16FE/8FE(POE or R-POE)

(MA5626 FE only, no POTS)

Protocol SIP, H.248

Synchronization 1588V2, Ethernet clock Synchronization

Power supply AC

Cooling passive

Protection FE 6kV, POTS 4kV

Only MA5620 provide

POTS

MA5620

24FE+24POTS

MA5620 8FE+8POTS MA5626 24FE

MA5626 16FE

MA5626 4GE+4FE, POE

MA5626 8FE and reverse POE


35pt

32pt

) :18pt

Page 134

Typical network topology & Configuration data

of MA5620&MA5626

EPON/GPON

OLT

Type C

IMS/SS Internet

Configuration data

Uplink 2 uplink ports, support GPON/EPON/GE modes

MA5620

(AC) 24FE+24POTS

16FE+16POTS

8FE+8POTS

MA5626

(AC) 24FE

16FE

8FE

8FE （POE）

8FE (reverse POE)

WIFI AP

POE

POE GE GE

UPE

POTS LAN LAN

Mainly used for FTTB+LAN

http://www.af66.com/product/94/11508.html


35pt

32pt

) :18pt

Page 135

MA5620&MA5626 Highlights

High Protection

•6kV Lighting Protection -LAN

•4kV Lighting Protection -POTS

Any Scenarios

•Variety of spec

•TDM POTS

•POE and Reverse POE power supply

Silent & High Reliability

•Passive Cooling

•No need maintenance

MA5620

MA5626

MA5620

TDM POTS •SIP, H.248.

•No need IAD, unified maintenance.

MA5626

PSE

Reverse POE • Easy deployment.

• Without outlet & Electric Meter

4G Ready

•2GE or GPON Type C

•1588V2

Passive Cooling

• No FAN, absolutely silence

• Removed to replace the fan trouble


35pt

32pt

) :18pt

Page 136


2 Slot: 8FE/8E1/16POTS for each slot

Uplink modes: •2GPON;

•2GE;

•1GPON + 1GE;

•1GPON + 1RF

3 Downlink modes: •2GE+6FE+16POTS;

•2GE+6FE

•2GE+6FE+16POTS+RF

Type Pizza Box & Plug in

Dimensions WxDxH: 442mm×220mm×43.6mm


Uplink 2 Port SFP, optional GPON or GE

Uplink protection GPON Type C, MSTP

Fixed Downlink 2GE+6FE+16POTS;

or 2GE+6FE;1PPS+TOD

Plug in card type 8FE/8E1(2 PRI available)/16POTS

Protocol SIP, H.248

Synchronization 1588V2, Ethernet clock Synchronization

Power supply AC+12V Battery backup; or DC

Cooling Intelligent fan speed adjustment

Protection FE 6kV, POTS 4kV


35pt

32pt

) :18pt

Page 137


of MA5612

Configuration data

GPON/EPON

OLT

Type C Type C

IMS/SS

Internet

PBX E1

Enterprise

gateway

RNC

CESOP/

Native TDM

Division POTS LAN

BTS Uplink 2 uplink ports, support

GPON/EPON/GE modes

FIX 2GE+6FE+16POTS

2GE+6FE

2GE+6FE+16POTS+RF

Board-type 8FE

16POTS

8E1

Max capability 48POTS

24FE

16E1


35pt

32pt

) :18pt

Page 138

MA5612 Highlights

Lease line & Enterprise Access

•Native TDM, CESOP, 1588V2, Type C

•POTS, E1, PRI

Flexible Application & Deployment

•Flexible plug-in card

•12V battery backup


•Intelligent fan speed adjustment

•Temperature harden to 65℃

High Protection


•4kV Lighting Protection -POTS

MA5612

12V battery backup • Easy deployment,

• Save space

• Low CAPEX

AC

mains

NodeB

PBX E1 PRI

E1

Enterprise Access • PBX Through PRI

• CESOP/Native TDM

• Enterprise Division Access


35pt

32pt

) :18pt

Page 139


Appearance Pizza Box

Dimensions WxDxH: 442mm×185mm×43mm


Uplink 2GE(SFP) , or 2GPON(SFP)

Uplink protection GPON Type C, GE LAG

Downlink 4GE/FE(e) + 4E1

Mounting bracket

AC power port

Environment Monitoring port

Synchronization 1588V2, Ethernet Synchronization, ACR

Power supply AC/DC

Cooling Passive cooling

Protection 6kV on GE/FE

Deployment mode Outdoor available

4GE/FE

4E1 2GPON/2GE


35pt

32pt

) :18pt

Page 140


of MA5628

GPON/EPON

OLT

Type C Type C

IMS/SS

Internet

企业网关

RNC

Node B

CESOP/

Native TDM

BTS

GE / E1

MA5628 (AC)

Uplink : 2 uplink ports, support GPON/EPON/GE modes

service port: 4GE/FE(e) + 4E1

Mainly used for FTTO and FTTM

Configuration data


35pt

32pt

) :18pt

Page 141

MA5628 Highlights

Any Scenario

•CESoP or Native TDM(GPON)

•E1 Independent clock


•Passive Cooling

•No maintenance

High Protection Rating


•GPON TYPE C

•GE LAG

MA5628

4G Ready

•2GE or GPON Type C

•1588V2


35pt

32pt

) :18pt

Questions

How many types of MxU?

What are the differences between MA561x series and MA562x

series?

Can MA5612 provide CATV service?

Page142


35pt

32pt

) :18pt

Contents




2.2 OLT

2.3 MxU

2.4 ONT


Page143


35pt

32pt

) :18pt

HG850a 4FE

2POTS

HG866 4FE

2POTS 1WIFI(11b/g)

USB

Bridge ONT

Bridge+VOIP ONT

Gateway ONT

HG865 1GE 3FE

2POTS 1RF

HG8245 4GE

2POTS 1WIFI(11n)

USB

HG863 4GE

HG861 1GE 1RF

HG8240 4GE

2POTS

HG8247 4GE

2POTS 1RF

1WIFI(11n) USB

HG813 4FE

HG850e 4FE

2POTS

HG810e 1GE

HG813e 4FE

HG866e 4FE

2POTS 1WIFI(11b/g)

USB

HG851a 4FE

4POTS

HG810a 1GE

HG8500 4FE

2POTS

HG810 1FE

HG813e 4FE

HG810e 1GE

HG860 1FE 1RF

HG850 4FE

2POTS

HG851 4FE

4POTS

HG850e 4FE

2POTS

OT550 4FE

2POTS

ONT Series


35pt

32pt

) :18pt

ONT Series

Page145

device type Network interface(NNI) User interface (UNI)

HG810 Bridge GPON 1FE

HG813 Bridge GPON 4FE

HG863 Bridge GPON 4GE

HG850a Bridge+VOIP GPON 2POTS+4FE

HG865 Bridge+VOIP GPON 1GE+3FE+2POTS+1RF

HG866 Gateway GPON 2POTS+4FE+2USB+WIFI

HG810e Bridge EPON 1GE

HG813e Bridge EPON 4FE

HG850e Bridge+VOIP EPON 2POTS+4FE

HG8240 Bridge+VOIP GPON/EPON 2POTS+4GE

HG866e Gateway EPON 2POTS+4FE+USB+WIFI

HG8245 Gateway GPON/EPON 2POTS+4GE+USB+WIFI

HG8247 Gateway GPON/EPON 2POTS+4GE+USB+CATV+WIFI


35pt

32pt

) :18pt

ONT-HG850

Page146

The HG850 is ONT designed for home users

and small office home office

(SOHO) users.

interface

GPON : 2.5Gbps/1.25Gbps

2 -port POTS

4 -port FE

protocol

MGCP, SIP, MoIP, FoIP

QoS

802.1q/802.1p

power

100V to 240V AC input

12V DC , 2A output

status description

POWER on: normal；off: abnormal

AUTH on: registered；off: unregistered

LINK on: Operation-state (normal working state)；

off: abnormal

LAN on: The HG850 is connected to the Ethernet；

blinking: Data is being transmitted；

off: The HG850 is not connected to the

Ethernet

VoIP on: The VoIP function is Enabled.

off: The VoIP function is disabled.


35pt

32pt

) :18pt

ONT-HG8247(new)

The HG8247 is an indoor ONT at the access layer of a GPON network,

designed for home users and SOHO users.

Page147

Port /Button Function

CATV Indicates an RF port, used to connect to a TV set.

OPTICAL The optical connector connected to this OPTICAL port is an SC/APC connector.

LAN1-LAN4 Indicate auto-sensing 10/100/1000 Base-T Ethernet ports (RJ-45),

used to connect to the PC or IP set-top box (STB)

TE1-TE2 Indicate VoIP telephone ports (RJ-11), used to connect to the telephone set.

USB Indicate USB host port, used to connect to USB storage devices.

WLAN Indicates the WLAN button, used to enable or disable the WLAN function.


35pt

32pt

) :18pt

Questions

How many services HG850 support?

Which ONT can support Wi-Fi service?

Page148


35pt

32pt

) :18pt

Contents




Page149


35pt

32pt

) :18pt

FTTH Solution

In an FTTH solution, different types of ONTs provide different service interfaces to users.

Typical FTTH network topology

Page150

Bridge

H810

H813

Multi-

service

H865

H850a

Internet

IP

softswitch

IPTV

Gateway

H866

H8247

imanager N2000

POTS

FE/RF

FE/GE

WI-FI

FE/GE

FE/RF

POTS

splitter

OLT

MA5600T

PC

HDTV

TEL

BTV/VOD

PC

PC


35pt

32pt

) :18pt

FTTB/FTTC Solution

An FTTB solution is applicable to enterprise

buildings, or the apartments where medium-

and- high density people live in. In an FTTB

solution, the OLT is connected by optical fibers

to the ONUs installed in building corridors, and

the ONUs are connected to all user terminals by

twisted pairs, so as to provide voice, data, and

video services to the users in the building.

FTTB/FTTC network topology

Page151

OLT MA5600

FTTB:

MA5620/MA5626

MA5652

splitter

FTTC:

MA5616

switch

IP

ADSL modem Home gateway Enterprise

switch

PC


35pt

32pt

) :18pt

FTTO Solution

Typical FTTO networking application

Page153

MA5612/

MA5628

OLT

MA5680


35pt

32pt

) :18pt

FTTO-Enterprise Access Service

Networking application of enterprise Internet access service

Page154


35pt

32pt

) :18pt


Private line interconnection application when the enterprise HQ

and the branches use different OLTs

Page155


35pt

32pt

) :18pt


Private line interconnection when the enterprise HQ and the

branches are connected to the same OLT

Page156


35pt

32pt

) :18pt


Enterprise PBX access

Page157

MA5612


35pt

32pt

) :18pt

FTTM Solution

Full-service carriers hope to carry 2G and 3G voice and mobile data services on a

unified ME network. The carriers expect to use abundant PON resources to carry

mobile services on an integrated plat form. This type of carriers can adopt the

combined solution of MA5680T +MA5612 or the combined solution of MA5680T +

MA5628, as shown in figure.

Networking application of a PON carrying base station access

Page158


35pt

32pt

) :18pt

FTTM Solution

TDM Service-based Base Station Access to the SDH Network

Application Through Private Line (Carried by the GPON Line)

Page159


35pt

32pt

) :18pt

Page160

FTTM Solution

ETH service-based base station private line access application

(QinQ private line)


35pt

32pt

) :18pt

Questions

How to provide enterprise VPN service through FTTx solution?

Which services can be provided by FTTM solution?

Page161


35pt

32pt

) :18pt

Summary

In this course, we have learned:

FTTx Hardware, such as OLT, MxU and ONT;

FTTx scenarios, such as FTTH, FTTB/C, FTTO and FTTM;

FTTx services, such as HSI, VOIP, IPTV and etc.

Page162

www.huawei.com

Thank You

Documents

ADSL Protocol Basics - ActForNet · 2015-06-10 · Information capacity defines the bits of the data modulated by each carrier. DMT uses 4.3125 kHz bandwidth as its unit. It divides