Ringback tones in SIP-Based Telephony

Document Type Expired Internet-Draft (individual)
Author Adam Roach 
Last updated 2000-11-09
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a mechanism by which an appropriate ringback tone may be played to the calling party when the called party's device is alerting. It is written specifcally to address the case where the Session Initiation Protocol (SIP) is used to initiate voice-over-IP calls. It also lists ringback characteristics for several countries.


Adam Roach (adam@nostrum.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)