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Title : Extensions to the 'tel' and 'fax' URLs to Support
Number Portability and Freephone Service
Author(s) : J. Yu
Filename : draft-yu-tel-url-03.txt
Pages : 12
Date : 14-Nov-01
This document proposes some extensions to the 'tel' and 'fax' Uniform
Resource Locators (URLs) for supporting number portability (NP) and
freephone service. Those proposed extensions allow the Session
Initiation Protocol (SIP) to carry those URLs or to convert those
URLs 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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