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.
Product Overview
The Cisco ONS 15454 MSTP offers a comprehensive selection of fixed optical filters, shown in Figure 1, for delivering the correct amount of bandwidth to each service location in a metro or regional network. The fixed filter cards are part of the Cisco ONS 15454 MSTP intelligent DWDM architecture for reducing DWDM complexity and speeding the deployment of next-generation networking solutions.
Figure 1
Fixed Optical Filter Family
Plug-in modules that deliver flexible access to network bandwidth from a single DWDM channel all the way to 32 channels, Cisco ONS 15454 fixed optical filter cards support the requirements of service provider and enterprise networks. Table 1 outlines the module types available for the Cisco ONS 15454 MSTP with the applications they are designed to support.
Table 1. Optical Filter Cards with Applications
Component
Deployment Application
32-channel multiplexer and demultiplexer
This product provides wavelength access (on or off ramp) for all the channels in a fiber cable. Typical deployment locations are terminal hub sites, including service provider central offices or enterprise telecommunications facilities.
Band-optical add/drop filters (B-OADM)
These filters allow access (add/drop) to a band or bands of frequencies from a fiber cable while passing the remaining frequencies. They are typically deployed at intermediate sites where access to greater bandwidth is required. They can also be inserted where future access to bandwidth may be required.
Channel-optical add/drop filters (C-OADM)
These filters enable access (add/drop) to individual wavelengths from a fiber cable while allowing the remaining frequencies to pass. They are deployed at intermediate sites where access to individual wavelengths is necessary. They can be cascaded to provide from 1- to 32-channel add/drop capabilities.
4-channel multiplexer/demultiplexer (4MD)
This product provides wavelength access (on or off ramp) to four channels from a band-OADM filter. They are deployed at intermediate sites where access to individual wavelengths is necessary.
The Cisco ONS 15454 fixed filter cards are based on the ITU 100-GHz wavelength plan. Each card integrates software-controllable variable optical attenuators (VOAs), providing automatic node- and network-based power level management. The optical cards incorporate LEDs on the faceplate to provide a quick visual check of the card's operational status. An icon on each faceplate is mapped to shelf-slot icons indicating the shelf slot where the card can be installed. The cards are supported by the integrated Cisco Transport Controller craft manager, which provides the user access for operations, administration, maintenance, and provisioning for the system.
All Cisco ONS 15454 fixed optical filter cards can drop and reinsert a wavelength without needing to regenerate the signal (optical bypass). This unique capability is supported at individual channel and band level and allows creation of multiring or mesh traffic matrixes using the available fixed filter cards.
The choice of filters 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 through 5 show sample signal-flow diagrams for a selection of Cisco ONS 15454 MSTP node types, outlining the use for each filter type.
Figure 2
MSTP Hub Node
Figure 3
Terminal Node
Figure 4
Active Optical Add/Drop Multiplexer (OADM) Node
Product Specifications
Tables 2 through 7 give specifications of the Cisco ONS 15454 fixed optical filters. Figures 5 through 9 are functional diagrams of the fixed optical filters.
