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Cisco 7600 Series Routers

Field Notice: OSM-1OC48-POS-SS Line Cards Do Not Recover from Power Cycle with Receive Signal Present


Revised March 12, 2004

August 12, 2002


Products Affected

Product

Top Assembly

Printed Circuit Assembly

Comments

HW Rev.

Part Number

Rev.

Part Number

Rev.

OSM-1OC48-POS-SS

68-0905-04

C0 and all prior versions

73-4792-04

B0 and all prior versions

1-PORT OC-48/STM-16 SONET/SDH OSM, SM-SR

1.1

Problem Description

When the OSM-1OC48-POS-SS is reloaded, show interface pos x/y will show down/down state. show controller pos x/y will show loss of signal (LOS) alarm. Shutting down or reloading the line card will not clear the problem.

Background

The Optical module latches up when Optical energy is applied before Electrical energy is provided to the module.

Note:?Optical modules that are version 68-0905-05 Rev.A0 and 73-4792-05 Rev.A0 have the fixed optics incorporated in the fab. All versions prior to this are affected by this field notice.

Problem Symptoms

MPLS3_w76e_nat#show interface p5/1
    POS5/1 is down, line protocol is down
    MPLS3_w76e_nat#sh contr pos 5/1
    Active Defects: SLOF SLOS PUNEQ
    Active Alarms: SLOS

Workaround/Solution

Use the standard RMA process to replace affected products.

Note:?In order to use the replacement card you must use IOS release 12.1(12)E or higher. Earlier versions will not recognize the replacement product.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdx27957 (registered customers only)

OSM OC48 POS interface not coming up sometimes

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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