3-50
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 3 Card Reference
OC12 LR/STM4 LH 1550 Card
Warning
Class 1 laser product.
Figure 3-33 OC12 LR/STM4 LH 1550 faceplate
You can install the OC12 LR/STM4 LH 1550 card in any multispeed or high speed card slot. You can
provision the card as part of an MSP or SNC ring. In ADM/TM configurations, you can provision the
card as either an access tributary or a transport span-side interface.
The OC12 LR/STM4 LH 1550 uses long-reach optics centered at 1550 nm and contains a transmit and
receive connector (labeled) on the card faceplate. The OC12 LR/STM4 LH 1550 uses SC optical
connections and supports 1+1 bidirectional or unidirectional protection switching.
The OC12 LR/STM4 LH 1550 detects LOS, LOF, LOP, MS-AIS, and MS-FERF conditions. Refer to
Chapter 1, “Alarm Troubleshooting,” for a description of these conditions. The card also counts section
and line BIT errors.
To enable MSP, the OC12 LR/STM4 LH 1550 extracts the K1 and K2 bytes from the SDH overhead and
processes them to switch accordingly. The DCC bytes are forwarded to the TCC-I, which terminates the
DCC.
FAIL
ACT
SF
61224
1
33678 12931
Tx
Rx
OC12LR
STM4LH
1550
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