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This AN coversa small portion of all available units within the
TM-platform.
See separate Data Sheets and
Application Notes for more information
about other products and other
networking examples
Network Application NoteTM-Series
TM-3000/-301/-101/-102
Double Dual GbETransponder
Quad MultiRateTransponder
8-port SDH/SONETMuxPonder
TM-101/-102
TM-301
TM-3000
4xSTM-16/STM-64MuxPonder
Mixed CWDM andDWDM Networking
Amplified DWDM links utilizes one single-fiber for transmit direction, and the other for receive direction. This enables introduction of optical amplifiers, since these can only operate in one direction.
The figure above shows a typical DWDM point-to-point link for multiple channels using one intermediate line amplifier site. Management access to the intermediate line amplifier site is created by using a separate OSC channel (Optical Supervisory Channel). This channel is created by the Control Unit (CU) and is based on a CWDM wavelength channel operating on one of the single-fibers.
This setup is very cost-effective, but the question is how the intermediate site can be included in the traffic matrix without introducing a costly DWDM OADM node.
The most cost-effective way to overlay more traffic onto the network above, is to add on CWDM-channels that run in parallel with the DWDM wavelengths. In this network example 4x GbE channels are to be carried from each of the end nodes to the intermediate node, i.e. a bus network.
The solution presented is to use the CWDM channels for GbE-traffic instead of OSC. Here we use this setup on both single-fibers to give the needed amount of GbE-channels.
As shown in the figure, the TP DDGBE unit is used to aggregate 2x GbE signals on two CWDM wavelength channels, giving a total of 4xGbE between the nodes. The embedded management channels of the TP DDGBE provide the needed management access to the intermediate node.
Amplified DWDM link
Adding CWDM as an overlay network
CUOSC
CUOSC
CUOSC
This example network is thus a combination of an amplified DWDM ptp-network with a single-fibre CWDM bus network utilizing the same fibre-pair. All plug-in units can be mounted in e.g. the TM-3000 chassis. The benefits of this solution compared to a traditional DWDM OADM setup is rather obvious. The same concept can be applied on links with multiple intermediate amplifier sites.
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See Data Sheets and Application Notes for more details on technical data and other networking examples, or contact Transmode.
Mentis Platform
The TM-series Platform entails both CWDM and DWDM solutions
in single-fibre or fibre-pair
configurations. All in the same
card cage, one thesame fibre andunder the same
node and network management
system.
9xGbE/10GMuxponder
mROADM
6-port Ethernet Demarcation Unit
EmbeddedNode Manager (ENM)
TransmodeNetwork Manager (TNM)
Double 10GbE DWDM Transponder
10G Tunable Transponder
The specifications and information within this document are subject to change without further notice. All statements, information and recommendations are believed to be accurate but are presented without warranty of any kind.
[email protected]+46 (0)8 527 675 50
web:email:
telephone:
Transmode Systems AB
SE-126 14 StockholmSweden
BOX 42114
CWDM/DWDM Gateway
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Fiber pair
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This second network example shows how the Quad MultiRate Transponder (TP QMR) can be used to translate between CWDM and DWDM networking. In the two left nodes the TP QMR units are configured as CWDM Transponders to transport the traffic up to a hub node via two separate single-fibers using CWDM -SFP’s. Additional traffic is collected in the hub node and all to be transported on a fiber-pair. The number of CWDM channels is now not sufficient and consequently we need to use a DWDM solution.
As shown in the figure, two TP QMR units are equipped with CWDM SFP’s on one side and DWDM-SFP on the other, thus forming a translation between CWDM and DWDM. The third TP QMR is equipped as a DWDM Transponder using client SFP’s on one side and DWDM SFP’s on the line side.
The two presented examples show the power of the TM Platform. The modularity and flexibility enables almost any mix of technologies and topologies.
TM-NE’s are managed via the Embedded Node Manager (ENM). The Transmode Network Manager (TNM) is used to manage both TM- and TS-networks. Contact Transmode or a Transmode representative for more information about the complete Transmode offerings.
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AN-C/DWDMRev C Mar 2008
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