Cisco ONS 15200 Series DWDM Systems

Field Notice 15169: Unprotected NAM 0/100 Has Incorrect B Label on Optical Fiber to CLIP Card

September 11, 2001

Products Affected


Top Assembly


Part Number





NAM, Unprotecting, 0/100, 15252 Multi-Channel Unit

Problem Description

The Unprotected Network Adaptor Module (NAM) 0/100 has a 'B' label on the side connecting to the Client Layer Interface Port (CLIP) board.

As an unprotected CLIP board only has a receiver on the the A-side of the CLIP, connecting the NAM 0/100 'B' fiber to the CLIP 'B' side results in no traffic.

The unprotected CLIP 'B' input does not have a receiver.


An Engineering Change Order (ECO) (C049898) was issued to correct this problem. The resolution was that the current NAM 0/100 label 'B' was replaced by 'A'.

Note: The current documentation correctly states how to connect the NAM 0/100 fiber to the CLIP. See Section 3.5 ONS15252 MCU Module installation (Non-ATO) > Procedure: Install the Network Adaptation Module.

For an unprotected channel, connect the optical-fiber jumper cable labeled A to the A-side MU adapter on the associated CLIP module.

Problem Symptoms

If the NAM 0/100 'B' fiber is connected to the CLIP 'B' side there is no traffic.

This situation should only occur when:

  • a Field Replaceable Unit (FRU) is replaced in the ONS15252 chassis.

  • a system is non-ATO and assembled by the customer.


In order to resolve the issue, the NAM 0/100 'B' labelled side should always be connected to the unprotected CLIP 'A' side.

Engineering Change Order (ECO)




ONS15200 - NAM 0/100, changing label from B to A on optical fiber.

How To Identify Hardware Levels

All affected NAM 0/100 can be identified, since they carry the 'B' label on the side to connect to the CLIP card (instead of the 'A' label).

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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