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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.4.1 OSCM Card
16.4.1 OSCM Card
The OSCM card is used in amplified nodes that include the OPT-BST or OPT-BST-E booster amplifier.
The OPT-BST and OPT-BST-E include the required OSC wavelength combiner and separator
component. The OSCM cannot be used in nodes where you use OC-N/STM-N cards, electrical cards, or
cross-connect cards. The OSCM uses Slots 8 and 10, which are also cross-connect card slots.
The OSCM supports the following features:
• OC-3/STM-1 formatted OSC
• Supervisory data channel (SDC) forwarded to the TCC2/TCC2P cards for processing
• Distribution of the synchronous clock to all nodes in the ring
• 100BaseT far-end (FE) UDC
• Monitoring functions such as orderwire support and optical safety
The OC-3/STM-1 section data communications channel (SDCC) overhead bytes are used for network
communications. An optical transceiver terminates the OC-3/STM-1, then it is regenerated and
converted into an electrical signal. The SDCC bytes are forwarded to the active and standby
TCC2/TCC2P cards for processing via the system communication link (SCL) bus on the backplane.
Orderwire bytes (E1, E2, F1) are also forwarded via the SCL bus to the TCC2/TCC2P for forwarding to
the AIC-I card.
The payload portion of the OC-3/STM-1 is used to carry the fast Ethernet UDC. The frame is sent to a
packet-over-SONET/SDH (POS) processing block that extracts the Ethernet packets and makes them
available at the RJ-45 connector.
The OSCM distributes the reference clock information by removing it from the incoming OC-3/STM-1
signal and then sending it to the DWDM cards. The DWDM cards then forward the clock information to
the active and standby TCC2/TCC2P cards.
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