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IETF RFC 6913 – Indicating Fax over IP Capability in SIP

This RFC document, entitled “Indicating Fax over IP Capability in the Session Initiation Protocol (SIP)”, authored by David Hanes, Gonzalo Salgueiro, and Kevin Fleming, defines and registers with IANA the new “fax” media feature tag for use with the Session Initiation Protocol (SIP). Currently, fax calls are indistinguishable from voice calls at call initiation. Consequently,…

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