Field Notice: ONS 15454-MRP-L1-XXX and 15454-MR-1-XXX Multi-rate Transponder Card SFP's Diagnostic Lock-up

Revised April 19, 2004

December 05, 2003

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Products Affected

Product	Top Assembly		Random #
	Part Number	Rev.
15454-SFP-OC48-IR=	10-1422	01	SFP - OC-48/STM-16 - 1310nm IR - SM - LC. Problem is fixed in 10-1975-01
15454-SFP-GEFC-SX=	10-1833	01	SFP - GE/1G-FC/2G-FC - 850nm - MM - LC. Problem is fixed in revision 02
15454-SFP-GE+-LX=	10-1832	01	SFP - GE/1G-FC/2G-FC/HDTV - 1310nm - SM - LC Problem is fixed in revision 02

Problem Description

Digital diagnostic of the above listed units may lock-up reporting constant value for laser current, RX and TX power even in the case that the physical value would change.

This lock-up does not affect traffic.

The MDS9000 product line is not affected by this change

Background

The problem is caused by a memory device used inside the Cisco Small Form-factor Pluggable (SFP) module that, under particular timing conditions, enter a lock-up state in which the last PM value is continuously reported.

The probability of lock-up condition occurring under normal operating condition is very low.

Problem Symptoms

Reference to the tables below for detailed systems descriptions.

TX Power

Client to Trunk	Transition		Behavior of Unit in All Cases
	From	To
	Output power within specified operating range	No Input Power (eg. Fiber Cut)	According to specification
	Output power within specified operating range	Input power below specified operating range	No Alarms for TX POWER LOW but BER degradation
	No output power	Input power withing specified operating range	Alarm of TX POWER LOW

RX Power

Trunk to Client	Transition		Behavior of Unit in All Cases
	From	To
	Input power within specified operating range	No output power (eg. Fiber cut)	According to specifications
	No input power	Output power within specified range	Alarm of RX POWER LOW

Laser Bias Current

Trunk to Client	Transition		Behavior of Unit in All Cases
	From	To
	TX laser operating within specired operating range	RX laser below the specified operating range	No Alarms

Workaround/Solution

No workaround is available. In case of component failure and diagnostic information is required, SFP has to be replaced.

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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