4-12
Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 4 Optical Cards
4.5 4.5.1 OC12 LR/STM4 LH 1310 Card-Level Indicators
Figure 4-4 OC12 LR/STM4 LH 1310 Faceplate and Block Diagram
You can install the OC12 LR/STM4 LH 1310 card in Slots 1 to 6 and 12 to 17, and provision the card as
a drop card or span card in a two-fiber BLSR, path protection, or ADM (linear) configuration.
The OC12 LR/STM4 LH 1310 card interface features a 1310-nm laser and contains a transmit and
receive connector (labeled) on the card faceplate. The card uses SC optical connections and supports 1+1
unidirectional and bidirectional protection.
The OC12 LR/STM4 LH 1310 card detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. Refer to the
Cisco ONS 15454 Troubleshooting Guide for a description of these conditions. The card also counts
section and line BIT errors.
To enable APS, the OC12 LR/STM4 LH 1310 card extracts the K1 and K2 bytes from the SONET
overhead to perform appropriate protection switches. The DCC/GCC bytes are forwarded to the
TCC2/TCC2P card, which terminates the DCC/GCC.
4.5.1 OC12 LR/STM4 LH 1310 Card-Level Indicators
Table 4-6 describes the three card-level LEDs on the OC12 LR/STM4 LH 1310 card.
uP bus
uP
Flash RAM
BTC
ASIC
STS-12
Mux/
Demux
Optical
Transceiver
OC-12
Main SCI
Protect SCI
STS-12 B
a
c
k
p
l
a
n
e
61354
FAIL
ACT
SF
OC12LR
STM4LH
1310
1
33678 12931
Tx
Rx