I-D ACTION:draft-yu-tel-url-07.txt

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	Title		: Extensions to the 'tel' URL to Support Number 
                          Portability and Freephone Service
	Author(s)	: J. Yu
	Filename	: draft-yu-tel-url-07.txt
	Pages		: 12
	Date		: 2003-1-8
	
This document proposes three extensions to the 'tel' Uniform Resource 
Locator for supporting number portability (NP) and freephone service.  
Those proposed extensions allow the Session Initiation Protocol to 
carry the tel URL or to convert the tel URL to the SIP URL so as to 
support NP and freephone service.  The proposed extensions allow the 
SIP protocol to be used to derive the routing number for the ported 
geographical numbers, identify the freephone service provider/carrier 
or the Plain Old Telephone Service (POTS) number for a freephone 
number, and carry the NP- and freephone-related information in the 
SIP messages.

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