June 30, 2005
15600 - 15600-192L4LR1550
15600 - 15600-192L4LR1550=
CNH080400UF CNH080400UG CNH080400UR CNH080400US CNH080400UT CNH080600HQ CNH08290001 CNH08290003 CNH08290005 CNH08290007 SAG06483H20 SAG06483H23 SAG06483H25 SAG06483H26 SAG06483H28 SAG06483H2D SAG06483H2F SAG07056QFX SAG07056QFY SAG07056QG1 SAG07056QG3 SAG07056QG5 SAG07076ZBJ SAG07076ZY9 SAG07076ZYA SAG07076ZYE SAG07147X5A SAG07147X5H SAG07198MJ0 SAG07198MJC SAG07198MJG SAG07198MJH SAG07198MJK SAG07198MJM SAG07198MJP SAG07198MJQ SAG07198MJU
The calibration data for the 10G optical module was not correctly written to the EEPROM on the board.
Certain OC192-LR modules require a longer period of time when reading the EEPROM data in the optical module. If an adequate amount of time is not provided the module may periodically not allow the Vendor ID to be read. If this should occur, the calibration station will identify the vendor as ?UNKNOWN?.
When the Vendor ID is ?UNKNOWN? incorrect resistor values are used for calibration. When this occurs, the calculation for the Laser Bias Current will be incorrectly calculated and the system software will read a value of infinity. The systems interpretation of infinity will vary and will periodically raise a Laser Bias Current High alarm incorrectly.
The calibration test station has been upgraded to provide the necessary time period to allow the data to be properly read.
Customer will see a Laser Bias Current alarm. Traffic is not affected.
It is possible for the Cisco TAC to correct the calibration data while the board is in service. Customers affected by this issue should contact the TAC who will follow the appropriate process (EDCS-435742)to correct the issue.
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:
Receive Email Notification For New Field Notices
Product Alert Tool - Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.