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Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 13 Card Reference
OC48 LR 1550 Card
13.9.1 OC48 LR 1550 Card Description
The OC48 LR 1550 card provides one intermediate-reach, Telcordia-compliant, GR-253 SONET OC-48
interface per card. Each interface operates at 2488.320 Mbps over a single-mode fiber span and supports
VT payloads and non-concatenated or concatenated payloads for STS-1, STS-3c, STS-6c, STS-12c, or
STS-48c.
shows the OC48 LR 1550 faceplate and
diagrams the card’s
functionality.
Figure 13-16 OC48 LR 1550 faceplate
You can install the OC48 LR 1550 card in any ONS 15327 high-speed card slot and provision the card
as a drop or span card in a two-fiber BLSR, UPSR, or in an ADM (linear) configuration.
The OC48 LR 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 1550 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. See
for a description of these conditions. The card also counts section and line BIT errors.
13.9.2 OC48 LR 1550 Card-Level Indicators
The OC48 LR 1550 card has three card-level LED indicators (
).
71562
OC-48/STM-16
LR 1550
FAIL
ACT
SF
Tx
Rx
Table 13-6 OC48 LR 1550 Card-Level Indicators
Card-Level Indicators
Description
Red FAIL LED
The red FAIL LED indicates that the card’s processor is not ready. Replace
the card if the red FAIL LED persists.
Green ACT LED
The green ACT LED indicates that the OC48 LR 1550 card is carrying traffic
or is traffic-ready.
Amber SF LED
The amber SF LED indicates a signal failure or condition such as LOS, LOF
or high BERs on the card’s port. The amber SF LED also illuminates when
the transmit and receive fibers are incorrectly connected. When the fibers are
properly connected, the light turns off.
Summary of Contents for ONS 15327
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