Field Notice: *Expired* FN - 62357- 15454-OPT-PRE, 15454-OPT-BST, 15454E-OPT-PRE and 15454E-OPT-BST with VendorID 1025 - Possible Traffic Hit During Software Upgrade / False Equipment Failure Alarm

Revised December 31, 2007

June 28, 2006

NOTICE:

THIS FIELD NOTICE HAS BEEN EXPIRED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE, WARRANTY OR SUPPORT. USE OF THE INFORMATION ON THIS FIELD NOTICE OR MATERIALS LINKED FROM THIS FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

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Revision History

Revision	Date	Comment
1.2	31-DEC-2007	Expired Field Notice
1.1	28-AUG-2007	The date of the document extended.
1.0	28-JUN-2006	Initial Public Release

Products Affected

Products Affected	Top Assembly Part Number	Comments
15454-OPT-BST	800-22244-XX	All HW versions are impacted by this issue
15454-OPT-PRE	800-22243-XX	All HW versions are impacted by this issue
15454E-OPT-BST	800-22244-XX	All HW versions are impacted by this issue
15454E-OPT-PRE	800-22243-XX	All HW versions are impacted by this issue

Problem Description

1. Pre-amplifiers and booster amplifiers (15454-OPT-BST, 15454-OPT-PRE) raise an equipment failure alarm (EQPT) and a Communication Failure Condition (COMM-FAIL). The alarm disables APC in the network, preventing circuit creation.

2. A traffic hit is generated during MSTP NE software upgrade.

Background

1. The alarm can be rarely generated under normal operating conditions by pre-amplifiers and booster amplifiers having a VendorID equal to 1025.

2. A traffic hit may be generated by an OPT-BST unit having VendorID equal to 1025 when operating with a Gain higher than 17dB and Total Input Power lower than -10dBm.

Problem Symptoms

1. An affected unit may raise and clear a Communication Failure Alarm (COMM-FAIL) before the equipment failure alarm (EQPT) because of communication problems between the unit and the Node Controller (TCC).

2. Optical Circuits passing through an affected booster amplifier unit may experience a traffic hit of duration between 10 and 300mSec during MSTP NE software upgrade

Workaround/Solution

1. If the problem occurs, perform a non-traffic affecting reset using the CTC craft terminal on the affected amplifier to clear the alarm. This will re-enable APC and allow normal operation for the network.

   This issue is resolved in Releases 6.2 and 7.0.1.

2. If an optical booster amplifier unit is working in the condition reported above, a workaround procedure can be followed to increase the Total Input Power and avoid Traffic Hits. This procedure can be applied only to nodes equipped with OADM (AD-1C-xx.x, AD-2C-xx.x, AD-4C-xx.x, AD-1B-xx.x, AD-4B-xx.x), ROADM (32-WSS and 32-DMX) and MUX/DMUX (32MUX-O and 32-DMX-O) units.

Locate the MSTP node where OPT-BST is used and check the Total Input Power by looking at the COM-RX Port.

If Total Input Power is lower than -10dBm then the following steps should be performed before upgrading the software:

1. Disable APC in the node.

2. Increase the Target Optical Power for the added channels entering the OPT-BST with a step of 1dB by changing the VOA calibration on the OADM, 32-WSS, 32MUX-O units.

3. Check on the far End Trunk Receiver DWDM Unit that no Optical Power Overload Alarm is raised.

4. Repeat the two steps above for all the ADD Channels until the OPT-BST Total Input Power is greater than -10dBm.

5. Perform the NE software upgrade to Release 7.0.1.

6. Remove calibration once the upgrade is completed and re-enable the APC.

   If more than one unit is affected by this problem in the network, it is suggested to adjust the Input Power for all of them before performing the software upgrade.

This issue has been corrected through a software change implemented in Release 7.0.1.

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
CSCsd33492 (registered customers only)	amplifier in equipment failure for communication problem

How To Identify Hardware Levels

To determine if the 15454-OPT-PRE, 15454E-OPT-PRE, 15454-OPT-BST and 15454E-OPT-BST is impacted by this issue:

1. Open CTC

2. Right-click on the amplifier module

3. Click on the Inventory tab

4. Review the Info tab

5. If the Vendor ID is 1025, the module may be impacted by the issues noted above.

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:

• Open a service request on Cisco.com
• By email
• By telephone

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