I-D ACTION:draft-ietf-sigtran-performance-req-01.txt

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This draft is a work item of the Signaling Transport Working Group of the IETF.

	Title		: VoIP Signaling Performance Requirements and 
                          Expectations
	Author(s)	: H. Lin,  K. Yang, T. Seth, C. Huitema
        Filename	: draft-ietf-sigtran-performance-req-01.txt
	Pages		: 20
	Date		: 27-Oct-99
	
This document serves as input into the IETF SIGTRAN requirements 
process. It includes call setup delay requirements, derived from 
relevant ISDN and SS7 standards published by ITU-T (International 
Telecommunications Union--Telecommunications Standardization Sector) and 
generic requirements published by Telcordia Technologies (formerly 
Bellcore). To gain user acceptance of Voice-over-IP (VoIP) services and 
to enable interoperability between Switched Circuit Networks (SCNs) and 
VoIP systems, it is imperative that the VoIP signaling performance be 
comparable to that of the current SCNs. The requirements given in this 
Internet Draft are intended to be the worst-case requirements, for at 
least in the United States SCN calls are typically set up at a faster 
speed than the derived requirements. At the end of the draft, several 
VoIP call connection scenarios based on the latest megaco protocol are 
analyzed and compared with similar cases in the PSTN. It indicates the 
PDD performance of VoIP systems is somewhat worst but not by much. An
improvement in some network element can bring VoIP systems to have
comparable PDD performance as the PSTN.

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