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4.15.1 OC192 IR/STM64 SH 1550 Card-Level Indicators
Figure 4-14
OC192IR
STM64SH
1550
FAIL
ACT
SF
Tx
1
Rx
Note
You must use a 3 to 15 dB fiber attenuator (5 dB recommended) when working with the
OC192 IR/STM64 SH 1550 card in a loopback. Do not use fiber loopbacks with the
OC192 IR/STM64 SH 1550 card. Using fiber loopbacks can cause irreparable damage to the card.
You can install OC192 IR/STM64 SH 1550 cards in Slot 5, 6, 12, or 13. You can provision this card as
part of a BLSR, path protection, or linear configuration, or also as a regenerator for longer span reaches.
The OC192 IR/STM64 SH 1550 port features a 1550-nm laser and contains a transmit and receive
connector (labeled) on the card faceplate. The card uses a dual SC connector for optical cable
termination. The card supports 1+1 unidirectional and bidirectional facility protection. It also supports
1:1 protection in four-fiber BLSR applications where both span switching and ring switching might
occur.
The OC192 IR/STM64 SH 1550 card detects SF, LOS, or LOF conditions on the optical facility. Refer
to the Cisco ONS 15454 Troubleshooting Guide for a description of these conditions. The card also
counts section and line BIP errors from B1 and B2 byte registers in the section and line overhead.
4.15.1 OC192 IR/STM64 SH 1550 Card-Level Indicators
Table 4-16
Cisco ONS 15454 Reference Manual, R8.5
4-32
OC192 IR/STM64 SH 1550 Faceplate and Block Diagram
STM-64 / OC192
Optical
transceiver
STM-64 / OC192
Optical
transceiver
describes the three card-level LEDs on the OC192 IR/STM64 SH 1550 card.
Demux
Demux
CDR
Mux
Mux
CK Mpy
ADC x 8
SRAM
Flash
Chapter 4
Optical Cards
STM-64/
OC-192
SCL
BTC
ASIC
STM-64/
OC-192
SCL
Processor
B
a
c
k
p
l
a
n
e
78-18106-01
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