A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Telephony Tones Using MIDI in SIP
Author(s) : D. Bryan, et. al.
Filename : draft-bryan-sipping-midi-00.txt
Pages : 65
Date : 2003-10-20
This document describes conventions for using MIDI to generate tones
on SIP UAs. This does not define any changes to SIP but describes how
to use the existing Alert-Info header to play tones that can be used
to indicate specialized PSTN tones such as the ringback tones from
various countries. The tones are described using MIDI which results
in a compact representation that is simple for a UA to generate and
easy to render into audio.
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