A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Alert-Info header URNs for Session Initiation Protocol (SIP)
Author(s) : D. Alexeitsev
Filename : draft-alexeitsev-bliss-alert-info-urns-01.txt
Pages : 12
Date : 2008-09-02
The Session Initiation Protocol (SIP) supports the capability to
provide a reference to the alternative ringback tone (RBT) for
caller, or ring tone (RT) for callee using the Alert-Info header.
However, the reference addresses only the network resources with
specific rendering properties. There is currently no support for
predefined standard identifiers for ringback tones or semantic
indications without tied rendering. To overcome this limitations and
support new applications a family of the URNs is defined in this
specification.Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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http://www.ietf.org/internet-drafts/draft-alexeitsev-bliss-alert-info-urns-01.txt
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