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Data Sheet
Optical Service Channel Cards for the Cisco ONS 15454 Multiservice
Transport Platform
The Cisco
®
ONS 15454 Multiservice Transport Platform (MSTP) (Figure 1) provides a comprehensive, intelligent
dense wavelength-division multiplexing (DWDM) solution for expanding metropolitan (metro) and regional bandwidth
Figure 1. Cisco ONS 15454 Optical Service Channel Cards
PRODUCT OVERVIEW
The Cisco ONS 15454 MSTP incorporates an optical service channel (OSC) to provide a bidirectional channel connecting all the nodes in
a DWDM ring. The OSC offers support for the following functions:
●
Supervisory data channel (SDC) for node-to-node communications
●
Distribution of synchronous clocking
●
100-Mbps user data channel
The OSC cards provide an OC-3/STM-1 formatted, 1510-nanometer (nm) signal inserted onto the fiber of a DWDM network outside the
band for transmission signals (Figure 2). In nonamplified sites, the OSC-Combiner/Splitter Module (OSC-CSM) card provides access to
the OSC received signal while expressing the remaining wavelengths and its transmitted signal is optically coupled into the fiber together
with the transmitted wavelengths. In amplified sites, an OSC optical add/drop multiplexer (OADM) filter is integrated within the booster
amplifier, providing the OSC wavelength to the OSCM (Optical Service Channel Module) card (Figures 3, 4, and 5). The OSC card's
optical interface provides extended optical reach to meet the node-to-node distances found in typical metro and regional networks. The
power levels of the OSC and composite express channels are controlled via software-controlled variable optical attenuators (VOAs) by the
intelligent DWDM software of the Cisco ONS 15454 MSTP.