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Updated:February 15, 2006
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The Cisco® ONS 15454 Multiservice Transport Platform (MSTP) provides a comprehensive, intelligent dense wavelength-division multiplexing (DWDM) solution for expanding metropolitan area (metro) and regional bandwidth.
The Cisco ONS 15454 MSTP offers a Mesh/Multiring Upgrade (MMU) card, shown in Figure 1, to provide a simple, reliable, and cost-effective solution to upgrade a Degree-2 ROADM Node to support additional flexibility. The MMU card is part of the Cisco ONS 15454 MSTP intelligent DWDM architecture engineered to reduce DWDM complexity and speed the deployment of next-generation networking solutions.
Cisco ONS 15454 Mesh/Multiring Upgrade Card
The MMU card is a plug-in module that takes advantage of the proven Cisco ONS 15454 carrier-class features to deliver the flexibility to deploy a ROADM node that is scalable in-service to support additional add/drop directions. Cisco ONS 15454 MSTP ROADM units provide each customer with access to every wavelength in all the nodes of a network, with the flexibility to decide if the wavelength has to be dropped locally or be allowed to pass through to the rest of the network (Degree-2 ROADM). This flexibility is enough for about 80 percent of the add/drop locations in a metro or metro core DWDM network, according to what customers are expecting in the foreseeable future of their networks. Other locations in the network will require, in the future, the ability to route wavelengths and services across more than two directions (Degree-N ROADM). For all these locations the Mesh/Multiring Upgrade (MMU) card provides a solution today which will support the require flexibility in the future.
The MMU card can operate in both the C band and the L band and is compatible with 100-GHz and 50-GHz channel spacing. Each card features integrated optical power monitoring capabilities to provide node- and network-based automatic power-level management. The MMU card incorporates faceplate-mounted LEDs to provide a quick visual check of the operational status at the card. Printed on each of the faceplates is an icon, an orange circle, which is mapped to shelf-slot icons indicating the shelf slot where the card can be physically installed. The card is supported by the integrated Cisco Transport Controller craft manager, which provides the user access for operations, administration, maintenance, and provisioning (OAM&P) for the system.
The need for the MMU card in ROADM nodes depends on the requirements of the network. The Cisco MetroPlanner optical design tool is available to assist in the engineering, bill-of-material development, and deployment of the DWDM network. Figures 2 shows a sample signal-flow diagram for a Cisco ONS 15454 MSTP ROADM node, where scalability to Degree-N is required.
C-Band ROADM Node with Scalability to Degree-N
Tables 1 through 4 give specifications for the Cisco ONS 15454 MMU card. Figure 3 shows functional diagram.
• TR-NWT-000332, Issue 4, Method 1 calculation for 20-year mean time between failure (MTBF)
Table 2. System Requirements
Cisco ONS 15454 ANSI
Cisco ONS 15454 ETSI
Timing, Communications, and Control 2 (TCC2) card/TCC2 Plus (TCC2P)
All (not required)
All (not required)
15454-SA-HD or 15454-SA-HD-DDR shelf assembly with FTA3 version fan-tray assembly
15454-SA-ETSI shelf assembly with SDH 48V fan-tray assembly
Release 7.0.0 ANSI or later
Release 7.0.0 ETSI or later
Table 3. Common Specifications
Signal fail (SF)
-5 to 55°C
23 to 131°F
5 to 95% relative humidity
-40 to 185°F
-40 to 85°C
5 to 95% RH
Functional Diagram of the Cisco ONS 15454 MMU Card
Table 4. Specifications for Cisco ONS 15454 MMU Card
Maximum Insertion loss
7.0 dB (EXP-RX - COM-TX)
2.3 dB (EXP-A-RX - COM-TX)
0.8 dB (COM-RX - EXP-TX)
14.8 dB (COM-RX - EXP-A-TX)
Operating bandwidth (all paths)
1500 nm to 1605 nm
Maximum input power
Maximum Polarization Dependent Loss (PDL)
0.2 dB (C band only)
0.2 dB (L band only)
0.3 dB (C + L band)
-20 to 20 ps/nm
Card power draw
Supported shelf slots
Table 5 gives ordering information for the Cisco ONS 15454 MMU card.
Table 5. System Ordering Information
Mesh/Multiring upgrade unit, C band and L band, for use with ONS 15454 MSTP Reconfigurable Optical Addr/Drop Multiplexer (ROADM) nodes (32-WSS/32-DMX or 32-WSS-L/32-DMX-L), LC connectors, includes one 2-meter LC/LC fiber-optic cable
1All compliance testing and documentation may not be completed at release of the product. Check with your sales representative for countries outside of Canada, the United States, and the European Union.