Specifications

4-80
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
OC48 LR/STM16 LH AS 1550 Card
4.26 OC48 LR/STM16 LH AS 1550 Card
The OC48 LR/STM16 LH AS 1550 card provides one long-range SONET/SDH OC-48 port compliant
with the International Telecommunication Union’s G.707, G.957, and Telcordia’s GR-253. Each port
operates at 2.49 Gbps over a single-mode fiber span. The card supports VT and non-concatenated or
concatenated payloads at STS-1, STS-3c, STS-6c, STS-12c, or STS-48c signal levels. Figure 4-28
shows the OC48 LR/STM16 LH AS 1550 faceplate and a block diagram of the card.
Figure 4-28 OC48 LR/STM16 LH AS 1550 faceplate and block diagram
You can install OC48 LR/STM16 LH AS 1550 cards in any multispeed or high-speed slot on the ONS
15454 and provision the card as a drop or span card in a two-fiber or four-fiber BLSR, UPSR, or in an
ADM (linear) configuration.
The OC48 LR/STM16 LH AS 1550 port features a 1550 nm laser and contains a transmit and receive
connector (labeled) on the card faceplate. The card uses SC connectors, and it supports 1+1
unidirectional and bidirectional protection switching.
The OC48 LR/STM16 LH AS 1550 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. See
Chapter 1, “Alarm Troubleshooting” for a description of these conditions. The card also counts section
and line BIT errors.
uP bus
uP
Flash
RAM
BTC
ASIC
Optical
Transceiver
OC-48
Main SCI
Protect SCI
STS-48
61358
Mux/
Demux
B
a
c
k
p
l
a
n
e
FAIL
ACT
SF
TX
1
RX
OC48LR
STM16LH
1550
AS