Datasheet

4-11
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
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.
Figure 4-4 shows the OC12 LR/STM4 LH 1310 faceplate and block diagram.
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
part of an MS-SPRing or SNCP ring. In ADM configurations, you can provision the card as either an
access tributary or a transport span-side interface.
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 detects LOS, LOF, LOP, MS-AIS, and 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 BIP errors.
To enable an MS-SPRing, the OC12 LR/STM4 LH 1310 extracts the K1 and K2 bytes from the SDH
overhead to perform appropriate protection switches. The GCC bytes are forwarded to the TCC2 card,
which terminates the GCC.
uP bus
uP
Flash
RAM
STM-4
Mux/
Demux
Optical
Transceiver
STM-4
Main SCI
Protect SCI
Cross
Connect
Matrix
STM-4
B
a
c
k
p
l
a
n
e
134391
FAIL
ACT
SF
1
Tx
Rx
OC12LR
STM4LH
1310