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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 4 Optical Cards
4.2.1 OC3 IR 4/STM1 SH 1310 Functionality
Figure 4-2 shows a block diagram of the four-port OC-3 card.
Figure 4-2 OC3 IR 4/STM1 SH 1310 Block Diagram
4.2.1 OC3 IR 4/STM1 SH 1310 Functionality
You can install the OC3 IR 4/STM1 SH 1310 card in Slots 1 to 6 and 12 to 17. The card can be
provisioned as part of a subnetwork connection protection (SNCP) ring or linear add-drop multiplexer
(ADM) configuration. Each interface features a 1310-nm laser and contains a transmit and receive
connector (labeled) on the card faceplate. The card uses SC connectors.
The OC3 IR 4/STM1 SH 1310 card supports 1+1 unidirectional and bidirectional protection switching.
You can provision protection on a per port basis.
The OC3 IR 4/STM1 SH 1310 card detects loss of signal (LOS), loss of frame (LOF), loss of pointer
(LOP), multiplex section alarm indication signal (MS-AIS), and multiplex section far-end receive failure
(MS-FERF) conditions. Refer to the Cisco ONS 15454 SDH Troubleshooting Guide for a description of
these conditions. The card also counts section and line bit interleaved parity (BIP) errors.
To enable an MSP-SPRing, the OC3 IR 4/STM1 SH 1310 card extracts the K1 and K2 bytes from the
SDH overhead to perform appropriate protection switches. The data communication channel/generic
communication channel (GCC) bytes are forwarded to the TCC2 card, which terminates the GCC.
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