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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter4 Optical Cards
4.12.1 OC192 IR/STM64 SH 1550 Card Functionality
Figure 4-20 shows a block diagram of the card.
Figure4-20 OC192 IR/STM64 SH 1550 Block Diagram
4.12.1 OC192 IR/STM64 SH 1550 Card Functionality
You can install OC192 IR/STM64 SH 1550 cards in Slot 5, 6, 12, or 13. You can provision this card as
part of an MS-SPRing, SNCP, or linear configuration, or as a regenerator for longer span reaches.
The OC192 IR/STM64 SH 1550 port features a 1550-nm lase r 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 bidirectional line switched ring 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 SDH 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.
Demux
CDR
Flash SRAM
Optical
transceiver
ADC x 8
Demux
BTC
ASIC
STM-64/
OC-192
STM-64/
OC-192
STM-64 / OC192
STM-64 / OC192
SCL
Processor
B
a
c
k
p
l
a
n
e
Mux
CK Mpy
Optical
transceiver Mux SCL