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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 4 Optical Cards
4.6.1 OC12 LR/STM4 LH 1550 Card Functionality
Figure 4-8 shows the OC12 LR/STM4 LH 1550 faceplate and a block diagram of the card.
Figure 4-8 OC12 LR/STM4 LH 1550 Faceplate and Block Diagram
4.6.1 OC12 LR/STM4 LH 1550 Card Functionality
You can install the OC12 LR/STM4 LH 1550 card in Slots 1 to 6 or 12 to 17. You can provision the card
as part of an MSP-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 1550 card 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 card uses
SC optical connections and supports 1+1 bidirectional or unidirectional protection switching.
uP bus
uP
Flash
RAM
BTC
ASIC
STS-12
Mux/
Demux
Optical
Transceiver
OC12/STM-4
Main SCI
Protect SCI
STS-12
B
a
c
k
p
l
a
n
e
110871
FAIL
ACT
SF
OC12LR
STM4LH
1550
1
Tx
Rx