Specifications

4-90
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
OC192 LR/STM64 LH 1550 Card
Figure 4-32 Enlarged section of the OC192 LR/STM64 LH 1550 faceplate
Caution You must use a 19 to 24 dB (20 recommended) fiber attenuator when connecting a fiber loopback to
an OC192 LR/STM64 LH 1550 card. Never connect a direct fiber loopback. Using fiber loopbacks
causes irreparable damage to the OC-192 card. A Tx to Rx connection that is not attenuated will
damage the receiver.
You can install OC192 LR/STM64 LH 1550 cards in any 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 OC-192 card port features a 1550 nm laser and contains a transmit and receive connector (labeled)
on the card faceplate.
Warning On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0).
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 may occur.
The OC192 LR/STM64 LH 1550 card detects SF, LOS, or LOF conditions on the optical facility. See
Chapter 1, “Alarm Troubleshooting” for a description of these conditions. The card also counts section
and line BIT errors from B1 and B2 byte registers in the section and line overhead.
DANGER - INVISIBLE
LASER RADIATION
MAY BE EMITTED
FROM THE END OF
UNTERMINATED
FIBER CABLE OR
CONNECTOR. DO
NOT STARE INTO
BEAM OR VIEW
DIRECTLY WITH
OPTICAL
INSTRUMENTS.
TX
MAX INPUT
POWER LEVEL
- 10dBm
RX
!
67465
Class 1M (IEC)
Class 1 (CDRH)