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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 4 Optical Cards
4.5 OC12 LR/STM4 LH 1310 Card
Warning
The laser is on when the optical card is booted. The port does not have to be in service for the laser
to be on.
Statement 293
Note The OC12 LR 1310 and OC12 LR/STM4 LH 1310 cards are functionally the same.
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.
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