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Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 4 Optical Cards
4.2 4.2 OC3 IR 4/STM1 SH 1310 Card
The OC3 IR 4/STM1 SH 1310 card provides four intermediate or short range SONET/SDH OC-3 ports
compliant with ITU-T G.707, ITU-T G.957, and Telcordia GR-253-CORE. Each port operates at
155.52 Mbps over a single-mode fiber span. The card supports Virtual Tributary (VT), nonconcatenated
(STS-1), or concatenated (STS-1 or STS-3c) payloads. Figure 4-1 shows the OC3 IR 4/STM1 SH 1310
faceplate and a block diagram of the card.
Note The OC3 IR 4 SH 1310 and OC3 IR 4/STM1 SH 1310 cards are functionally the same.
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.
Statement 293
Figure 4-1 OC3 IR 4/STM1 SH 1310 Faceplate and Block Diagram
You can install the OC3 IR 4/STM1 SH 1310 card in Slots 1 to 6 and 12 to 17. The card can be
provisioned as part of a path protection or in a linear add/drop multiplexer (ADM) configuration. Each
interface features a 1310-nm laser and contains a transmit and receive connector (labeled) on the card
faceplate. The card uses SC connectors.
The OC3 IR 4/STM1 SH 1310 card supports 1+1 unidirectional or bidirectional protection switching.
You can provision protection on a per port basis.
uP bus
uP
Flash
RAM
BTC
ASIC
B
a
c
k
p
l
a
n
e
STS-12
STS-12/
STS-3
Mux/Demux
Optical
Transceiver
Optical
Transceiver
Optical
Transceiver
Optical
Transceiver
STS-3
termination/
framing
STS-3
termination/
framing
STS-3
termination/
framing
STS-3
termination/
framing
OC-3
61352
1
33678 12931
Tx
Rx
2
Tx
Rx
4
Tx
Rx
3
Tx
Rx
FAIL
ACT
SF
OC3IR4
STM1SH
1310