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Date et page . 1 Nexans Cabling Solutions
Cat8 is coming!
Gerd Backhaus
Marketing Manager D-A-CH
Date et page . 2
Tower of Babel…?
Date et page . 3
Agenda
Why a new cabling standard? -> 40GBase-T
Where needed? -> Data Centres
Which cabling? -> TP up to 2 GHz
Date et page . 4
Why a new 2GHz cabling standard?
In priciple existing 7A cabling has
enough capacity for 40G
Shannon Capacity for 4-pair channels
Nexans Modelling
ISO Cat6A
U/UTP
ISO Cat6A
F/UTP
LANmark-7
LANmark-7A
0
10
20
30
40
50
60
1
Ca
pa
cit
y (
in G
B)
ISO Cat7
S/FTP
ISO Cat7A
S/FTP
BUT the upcoming protocol for „40GBase-T“ requires frequencies
> 1000 MHz ( „Cat7A Plus“ or „Cat.8...“)
Date et page . 5
40GBase-T
...where needed?
Date et page . 6
Current figures for Ethernet
• 10GBaseT does increase
slowly – but no break
through yet
• 10G will obtain 1G not
until 2016
• This will slow down
adoption for 40G
Date et page . 7
Current figures for Ethernet
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Reasons for 40G are identical to 10G
• Auto Negotiation
• Cost reduction
• Port density
• reach
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9
Source: Bob Wagner, Panduit
Network Design Comparison
Date et page . 10
802.3bq objectives •Support full duplex operation only
•Preserve the 802.3 / Ethernet frame format utilizing the 802.3 MAC
•Preserve minimum and maximum Frame Size of current 802.3 standard
•Support a BER better than or equal to 10-12 at the MAC/PLS service interface
•Support Auto-Negotiation (Clause 28)
•Support Energy Efficient Ethernet (Clause 78)
•Support local area networks using point-to-point links over structured cabling
topologies, including directly connected link segments
•Do not preclude meeting FCC and CISPR EMC requirements
•Support a data rate of 40 Gb/s at the MAC/PLS Service Interface
•Define a link segment based upon copper media specified by ISO/IEC JTC1/SC25/WG3
and TIA TR42.7 meeting the following characteristics:
–4-pair, balanced twisted-pair copper cabling
–up to 2 connectors
–up to at least 30 m
•Define a single 40 Gb/s PHY supporting operation on the link segment
TOR
&
EOR
Date et page . 11
Date et page . 12
40GBase-T Milestones
09/2012 Speed is 40G
Q4/2012 Reach first 20-30m then
defined as „at least 30m“
05/2013 TaskForce approval
H2/13 Creation of Channel Adhoc and Phy
AdHoc comparing cabling and silicon
options
03/2014 4X10G Baudrate / 3 Level Power
Backoff
07/2014 First Cabling Parameters selected
09/2014 First Draft
Date et page . 13
Multiple target conflicts
Frequency vs energy costs vs reach
„And the winner is ...“ ==> high clock rate @ lower reach
Reasons:
• Simplier
• Ease of implementation
• Less complex market launch
Complex coding
lower
frequencies
Lower attenuation
Wider reach Higher chip
costs
Simpler coding
Higher
frequencies
Higher attenuation
Lower reach Energy costs
Date et page . 14
Baudrate 4 X 10G
Decision about Baudrate has been taken in March 2014
based on input from Aquantia and Broadcom
Main Argument re-use of 10G Chips at higher clock rate
Power expected to be
• 4-5Watt
Date et page . 15
Baud-rate and frequency
application coding Bits/
Sym-
bol
Pairs Baud-rate Data-rate Band-
edge
Freq
Signal
Spektrum
(MHz)
Freq.
Reserve
Cabling
1GBase-T
PAM-5 2 4 125 1000 62.5 ~80 17.5 100
10GBase-T
128-DSQ
3.125 4 800 10000 400 ~480 80 500
40GBase-T
128-DSQ 3.125 4 3200 40000 1600 ~1800 200 2000
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Where is 40G needed?
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Target segment is DC-
but not enterprise cabling!
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Reach in DCs
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Future DC design layout
For 20-30% links in DCs 30m is possibly not enough
Layout has to be adjusted
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Other target segments
SOHO:
• ISO15018 defines
shorter channels (25 and
50m)
• 40G possible – with
length limitation ( 30m
max.)
• but there are many
alternatives…
Enterprise :
•30m are not enough in most
cases
•Extended drive distances with
better cabling seem to be
possible (but not proven yet)
• will require „40G Version 2“ ?
Date et page . 21
Which kind of cabling can do
40GBase-T?
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ISO‘s
Technical Report
Gave an overview about the
different cabling possibilities
ISO Technical Report
Date et page . 23
New names assorted
•Class I and Class II are not final names – final definition will be done in 3rd Edition 11801
• Option FA has been skipped after baud-rate dicission has been done
• All cabling options will be SHIELDED only!
Cat 8.1
Channel I
Cat 8.2
Channel II
Channel Y
Date et page . 24
Comparison: Classes/Categories TIA vs ISO/IEC
ISO/IEC ISO/IEC Is similar to… TIA Channel/
Channel components components
Class E Cat 6 Cat 6
Class EA Cat 6A Cat 6A
Class I Cat 8.1 Cat 8
Class FA Cat 7A (no counterpart)
Channel Y Cat 7A
extended (no counterpart)
Class II Cat 8.2 Class II
Date et page . 25
Class I @1600MHz
Channel Y @1600MHz
Class II @1600MHz
RL 8 6
8
IL 29.2 27.2
27.2
NEXT 12.9 30
31.4
ACR-F 9.9 18
34.1
CA 25.9 30.9
25.9
PSANEXT 66.9 57
66.9
PSAACRF 36.9 27.9 36.9
* Extended and
improved Cat6A
*Extended Cat7A * Extended and
improved Cat7A
• IEEE Meeting, Ottawa - > decision done on Class I
• Class I almost identical with EIA/TIA Cat 8
• significant NEXT + ACR-F advantages for Channel Y & Class II @ 1.6GHz
• increased Alien Crosstalk requirements compared to Cat.6A & 7A
comparison
Date et page . 26
Energy savings by increased NEXT
802.3bq input shows that up
to 20% saving with better
NEXT ~6-9dB can be
achieved
Date et page . 27
IEEE meeting results
Ottawa, September 2014
Working group accepted that the RJ45 is an MDI (one off potentially
more) for 40GBaseT and accepted most of Class I as baseline for
40G
No technical argument broad forward to argue, Power effects of ARJ45 were
noted but assumed to be “not needed”, in fact no new power assessment done
BUT: Broadcom raised concerns if RJ45 can pass a external noise test which they
have to do for the system vendors, further testing needs to confirm RJ45
performance until end of year otherwise other MDI might be voted (Action
required)
Worst case Cabling (Class I) adopted as most inclusive
Date et page . 28
MDI connector: RJ45
MDI (Media Dependant Interface im Switch/Server): RJ45
has won the race …but there are some doubts…
dB@1600MHz RJ45 ARJ45/GG45
contacts
IL <-2.5 <-1.6
RL <-13 <-17
NEXT <-13 <-50
FEXT <-26 <-50
SNR 10.5 15.4
Date et page . 29
40G roadmap
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20182014 2015 2016 2017
IEEE Technically
CompleteIEEE Std
40G
Switches
First
Cabling Offers (CH-
Y, Class II)
More 2GHz
Cabling Offers
40G Servers:
NIC Cards , LOM..
Forecasted
Demand is ~15%
Date et page . 30
Pro‘s Con‘s
EOR Cat6A Products available, rel. cheap Re-installation required for
40G, not scalable
TOR Within the „Cisco“-comfort zone...,
scalable
Expensive on the long term,
not future prove
EOR F/O Products available, scalable On the long term more
expensive than Cu-Solutions
(active components, energy
costs)
EOR GG45 /
Channel-Y
Products available, scalable
up to 40GBase-T, backward
compatible, energy efficient!!
40GBase-T requirements not
defined 100% yet (but low
risc…)
Planning a new DC - which options do you have today?
Today options
Date et page . 31
NEXT/FEXT (worst pair)
Extended LANmark7A shows big headroom against Class1/8.1
GG45™
Date et page . 32
Eight RJ45 pins
100% Class D/E/EA
backward compatible
Four additional
GG45™ highspeed pins
for Class F/ FA
GG45™ - functionallity
GG45™ Interface
Date et page . 33
Alternative use of better SNR
CH Y headroom could be used for larger distance >30m
Date et page . 34
IEEE will go for Cat8.1 – 2000MHZ
Draft 40GBase-T with "large Headroom“ -> Cat7A extended is enough
LANmark-7A Extended Freq "Ready for 40GBase-T" can be made
available now!
Using 1800MHz cable and current GG45 (+staggered panel or A-XT
clips) offers 'Cat8.1/40Gbase-T-Draft with headroom’
Safe against further refinements!
For now: interested customers needs to contact us in case to create a
quote, spec-in and creation of BOM
Full product launch targeted for Q1 2015 now with 2 GHz Freq Range
For new DC designs: respect link length of 30m max.
Final Thoughts...
Date et page . 35
contact
Gerd Backhaus
Nexans Cabling Solutions
