Datasheet

4-14
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 4 Optical Cards
4.6.2 OC12 LR/STM4 LH 1550 Card-Level Indicators
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.
The OC12 LR/STM4 LH 1550 card detects LOS, LOF, LOP, MS-AIS, and MS-FERF conditions. Refer
to the Cisco ONS 15454 SDH Troubleshooting Guide for a description of these conditions. The card also
counts section and line BIP errors.
To enable an MS-SPRing, the OC12 LR/STM4 LH 1550 extracts the K1 and K2 bytes from the SDH
overhead and processes them to switch accordingly. The GCC bytes are forwarded to the TCC2 card,
which terminates the GCC.
4.6.2 OC12 LR/STM4 LH 1550 Card-Level Indicators
Table 4-7 describes the three card-level LED indicators on the OC12 LR/STM4 LH 1550 card.
4.6.3 OC12 LR/STM4 LH 1550 Port-Level Indicators
You can find the status of the OC12 LR/STM4 LH 1550 card ports using the LCD screen on the
ONS 15454 SDH fan-tray assembly. Use the LCD to view the status of any port or card slot; the screen
displays the number and severity of alarms for a given port or slot. Refer to the Cisco ONS 15454 SDH
Troubleshooting Guide for a complete description of the alarm messages.
4.7 OC12 IR/STM4 SH 1310-4 Card
Note For specifications, see the “A.6.6 OC12 IR/STM4 SH 1310-4 Card Specifications” section on
page A-33.
The OC12 IR/STM4 SH 1310-4 card provides four intermediate or short range SDH STM-4 ports
compliant with ITU-T G.707, and ITU-T G.957. Each port operates at 622.08 Mbps over a single-mode
fiber span. The card supports concatenated or nonconcatenated payloads on a per VC-4 basis.
Table 4-7 OC12 LR/STM4 LH 1550 Card-Level Indicators
Card-Level LED Description
Red FAIL LED The red FAIL LED indicates that the card processor is not ready. The FAIL
LED is on during reset and flashes during the boot process. Replace the card
if the red FAIL LED persists.
Green/Amber ACT LED The green ACT LED indicates that the card is operational and ready to carry
traffic. The amber ACT LED indicates that the card is in standby mode or is
part of an active ring switch (MS-SPRing).
Amber SF LED The amber SF LED indicates a signal failure or condition such as LOS, LOF,
MS-AIS, or high BERs on one or more card ports. The amber SF LED is also
on if the transmit and receive fibers are incorrectly connected. If the fibers
are properly connected and the link is working, the light turns off.