Some OC-48 line cards will not properly detect receive optical carrier when power cycled.
If a line card is powered up with a receive optical signal already present, it may experience this problem. If a line card is powered up and an optical signal is subsequently applied, this problem will not occur. An in-service product that experiences power cycling is at risk for this problem.
The line card fails to detect receive optical carrier, which renders the line card inoperative.
Replace the affected hardware. Return materials authorizations (RMAs) must be coded as shown below.
Service Level: Mfg New - 3rd Business Day NON BILLABLE
RMAs will be shipped next business day, standard delivery only.
How To Identify Hardware Levels
Using the Command Line Interface (CLI)
Use the show diag slot command to view the line card deviation and serial number. In the example shown below, the line card was built to deviation D012224 and has a top assembly number (TAN) of 800-5619-01. This line card is within the affected serial number range, but is guaranteed not to exhibit this problem because it was manufactured under deviation D012224.
The line card serial number, deviation number, (TAN) and printed circuit board (PCB) assembly number can all be found on stickers that are located on the PCB. Refer to the picture below.
Note: Photo below is not of an OC48E/POS or OC48/SRP line card.
Note: Stickers may not always be in this exact location on the PCB.
The OC48E/POS-SR-FC(=) product is not affected by this problem because it was never manufactured with the defective optical module.
See also Field Notice 13833 for other products affected by this problem but with different recommend workarounds.
How to Identify Optics Modules
Not all products within the affected serial number range listed in the "Products Affected" section above are susceptible to the symptom described in this field notice. For customers who wish to be more selective in identifying and replacing potentially affected line cards the following information is provided.
All types of OC48E/POS line cards that have optics modules with a silver cover are not susceptible to the symptom described in this field notice. The photo below shows an example of this type of optics module. A yellow rectangle has been added to the photo to identify the optics module.
Note: No OC48E/SRP line cards use this type of optics module.
Some optics modules with a black case are susceptible to the symptom described in this field notice. This type of optics module was used on both the OC48E/POS and OC48/SRP line cards. The photo below shows an example of this type of optics module on an OC48E/POS line card. A yellow rectangle has been added to the photo to identify the optics module.
Optics modules having a black case (as shown above) that may be susceptible to the symptom described in this field notice have serial numbers that fall within the serial number range shown below. Modules with serial numbers that are not listed are not susceptible.
The optical module serial number can be obtained by examining the white sticker on the top of the optics module. The photo below shows an example of this sticker. A yellow rectangle has been added to the photo to identify the serial number.
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: