@techreport{elwell-sip-e164-problem-statement-01,
	number =	{draft-elwell-sip-e164-problem-statement-01},
	type =		{Internet-Draft},
	institution =	{Internet Engineering Task Force},
	publisher =	{Internet Engineering Task Force},
	note =		{Work in Progress},
	url =		{https://datatracker.ietf.org/doc/html/draft-elwell-sip-e164-problem-statement-01},
        author =	{John Elwell},
	title =		{{SIP E.164 Problem Statement}},
	pagetotal =	9,
	year =		2008,
	month =		oct,
	day =		25,
	abstract =	{SIP has long supported the use of both email-style addresses (user@host) and telephone-style addresses (number@host) in the "From:" address. A significant number of SIP deployments use the latter style with E.164 numbers. This document describes the problems that occur when such E.164 numbers are used in SIP.},
}