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Cisco ONS 15454 Series Multiservice Provisioning Platforms

Field Notice: FN - 63014 - 15454W-32-DMX and 15454W-40-DMX Have a Power Degrade On the Output Ports of the Card


Revised August 18, 2008
March 25, 2008

NOTICE:

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


Revision History

Revision

Date

Comment

1.1 18-AUG-2008 Added references to 15454-40-DMX-C= throughout field notice and updated instructions accordingly. Added DDTS CSCsl26125.

1.0

25-MAR-2008

Initial Public Release

   

Products Affected

Product

Top Assembly

Comments

Hardware Revision

Part Number

Revision

15454-32-DMX

800-24664-03

Old - D0

The only Defective and affected parts are with Vendor ID #2049, 2050. The New revision is required because of a CLEI number change.

New - 800-24664-04 - E0

15454-32-DMX=

800-24664-03

Old - E0

The only Defective and affected parts are with Vendor ID #2049, 2050. The New revision is required because of a CLEI number change.

New - 800-24664-04 - F0

15454-32-DMX

800-24664-03

Old - D0

The only Defective and affected parts are with Vendor ID #2049, 2050. The New revision is required because of a CLEI number change.

New - 800-24664-04 - E0

15454-32-DMX=

800-24664-03

Old - E0

The only Defective and affected parts are with Vendor ID #2049, 2050. The New revision is required because of a CLEI number change.

New - 800-24664-04 - F0

15454-40-DMX-C= 800-27455-02 Old - B0 The only Defective and affected parts are with Vendor ID #2304, 2306. New - C0

   

Problem Description

During field installation, the 15454-32-DMX and 15454-40-DMX-C= have shown a power degrade on the channel TX (output) ports.

The problem was triggered when the optical power was counter-propagating into the card. The variable optical attenuator (VOA) control routine is confused by the unexpected counter-propagating light, triggering the VOA regulation.

The regulation ends only when the VOA attenuation reaches its maximum value.

Adding new channels in a node equipped with the 32-DMX, or 40-DMX can cause an automatic reduction of the in-service TX channels ports by the system, and result in optical power related alarms.

The affected vendor parts are cards with ID# 2049, and 2050 for the 32-DMX, and ID# 2304 and 2306 for the 40-DMX= only.

Background

The in-service wavelengths were working properly until new services/wavelengths were added, and a transponder's patch-cord was connected incorrectly, which resulted in light being injected at the output (TX) of the 15454-32-DMX and the 15454-40-DMX-C= cards.

We found that the counter-propagating light was the problem causing power degrade on that port.

Problem Symptoms

Condition: Wrong cabling of transponders or line-cards to fiber patch-panel, in particular, swapping the receive(RX) with the transmit (TX) patch-cords.

With the 32-DMC-C, 32-DMX-L, and the 40-DMX-C= cards condition above, the counter-propagating light resulting from the bad cabling can impact the internal variable optical attenuator (VOA) control loop, leading to an increased optical path attenuation.

Workaround/Solution

To prevent traffic being affected at creation of a new circuit, the following procedure is suggested to quickly detect improper cabling of 32-DMX or 40-DMX cards:

  1. TXP is pre-provisioned, but not installed:

    Set the Trunk-TX Administration State to Out Of Service then move to step 2.

  2. Install the TXP(transponder):

    Do not wire the Trunk-TX/RX port to the patch-panel.

    Wait until the TXP (transponder)completes the boot procedure, then verify with the Trunk-TX Administration State to see if it is already Out Of Service. If not, manually change it to Out of Service.

  3. Wire the Trunk-TX/RX port of the TXP (transponder) to the patch-panel.

  4. Turn up the TXP (transponder):

    Change the Trunk-TX Administration state to IS

  5. Go to the WSS card and verify the "Power ADD" field on the CHAN-RX port connected to the TXP.

    1. If a valid power level is present, the cabling is ok.

      Move back the Administration state to the original (desired) state.

    2. If NO power level is present, the cabling is wrong.

      Move back the Administration state of the TXP to Out Of Service state and revert the cabling.

Replace the affected hardware if you still have the problem.

As of approximately January 15, 2008, new products that were manufactured under an Engineering Change Order are guaranteed to be free of this problem.

Refer to How to Identify Hardware Levels below for instructions on how to view the version of in-service product.

Cisco recommends a fix-on-fail strategy for this problem.

Service Logistics has known-good inventory at this time. The standard RMA process and delivery times are in effect.

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

CSCsk80116 (registered customers only)

VOA Accuracy affected by counterpropagating light

CSCsl26125 (registered customers only) [40-DMX] VOA Accuracy affected by counterpropagating light

   

How To Identify Hardware Levels

Cisco Serial Number Validation Tool

Note: Only the combination of the cards with the ID #2049, or ID #2050 and the Serial Numbers in the validation tool are affected.

Note: The 15454-40-DMX-C= cards are not included in the Serial validation tool.

To determine the Part Number of your ONS 15454-32-DMX or 15454-40-DMX-C= cards:

Open Cisco Transport Controller.

From the Shelf View, select Inventory

From the Inventory tab, locate the 15454-32-DMX or 15454-40-DMX-C= boards and compare the information from the Inventory tab against the Products Affected.

The Vendor ID# 2049, or 2050 for the 15454-32-DMX, or the Vendor ID# 2304, or 2306 for the 15454-40-DMX-C= is visible under the "Value section" of the inventory tab.

If you are using TL1 commands.

1. >ACT-USER::

2. >RTRV-INV::ALL

3. >CANC-USER::

Compare the information from the TL1 inventory command against the Products Affected section above, and the Vendor ID#.

Note: Only the specified Vendor ID#'s in this field notice are affected.

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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