I-D ACTION:draft-foster-mgcp-returncodes-01.txt

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	Title		: Media Gateway Control Protocol (MGCP) Return Code 
                          Usage
	Author(s)	: B. Foster, C. Sivachelvan
	Filename	: draft-foster-mgcp-returncodes-01.txt
	Pages		: 21
	Date		: 2003-2-7
	
It is neither possible, nor necessary, to come up with an error code 
for all possible error situations that might occur. Consequently, 
some error codes in the MGCP Protocol (RFC 3435) are indications of 
very specific errors, whereas others are more generic in nature. In 
general, the choice of which error code to use in a given error 
situation may not always be clear. However, Call Agents may take very 
different action depending on which error code is being used. The 
objective is thus, to make sure that Call Agents behave the same for 
a given error situation that occurs in a Media Gateway. This document 
enables this by categorizing error codes based on expected Call Agent 
behavior. It also expands on the descriptions of the error codes in 
RFC 3435, giving additional guidelines for usage. The purpose is to 
improve interoperability between Call Agents and Gateways.

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