Cisco Cisco ONS 15454 SDH Multiservice Provisioning Platform (MSPP) Guía De Instalación

The OC3 IR 4/STM1 SH 1310 detects LOS, LOF, Loss of Pointer (LOP), Multiplex Section Alarm 
Indication Signal (MS-AIS), and Multiplex Section Far End Receive Failure (MS-FERF) conditions. 
Refer to 

Chapter 1, “Alarm Troubleshooting,”

 of  the “Cisco ONS 15454 SDH Troubleshooting and 

Maintenance Guide, R3.3” for a description of these conditions. The card also counts section and line 
bit interleaved parity (BIP) errors.

To enable automatic protection switching (APS), the OC3 IR 4/STM1 SH 1310 extracts the K1 and K2 
bytes from the SDH overhead to perform appropriate protection switches. The DCC bytes are forwarded 
to the TCC-I, which terminates the DCC.

The OC3 IR 4/STM1 SH 1310 card has three card-level LED indicators. 

You can find the status of the four card ports using the LCD screen on the ONS 15454 SDH fan tray 
assembly. Use the LCD to view the status of any port or card slot; the screen displays the number and 
severity of alarms for a given port or slot. Refer to the Cisco ONS 15454 SDH Installation and 
Operations Guide, R3.3 for a complete description of the alarm messages.

Red FAIL LED

The red FAIL LED indicates the card’s processor is not ready. This LED is 
lit during Reset. The FAIL LED flashes during the boot process. Replace 
the card if the red FAIL LED persists.

Green ACT LED

The green ACT LED indicates the OC3 IR 4/STM1 SH 1310 card is 
carrying traffic or is traffic-ready.

Yellow SF LED

The yellow SF LED indicates a signal failure or condition such as LOS, 
LOF, MS-AIS or high BER on one or more of the card’s ports. The Yellow 
SF LED also illuminates when the transmit and receive fibers are 
incorrectly connected. When the fibers are properly connected and the links 
are working, the light turns off.