MCS Ringback and Treatment Service
33
•
connection to a MAS to provide ringback through the use of the existing
treatment pooled service mechanisms
•
connection to a MAS to provide treatments appropriate to the call
failure reason through the use of the existing treatment pooled service
mechanisms
•
reconnect of far end media should the SIP signaling indicate that the far
end media is providing that instead
•
differential ringback styles based on the locale of the home domain for
the endpoint to which ringback is applied
Triggering of ringback
The MCS handles transfer (SIP REFER) for any endpoint where the
discriminator file for that endpoint indicates no support for this capability.
This is accomplished by means of the PIVOT attribute, that is False in
such instances.
Currently, the main use case is the Communication Server 2100 (CS 2100)
in the Succession Network 06 release (SN06) and the Virtual Router
Distribution Node (VRDN)-based CS 2100 in the Succession Network 07
release (SN07). The MCS, on detection of this, after a SIP indication of
transfer-to party alerting is received, apply audible ringback to the originator
by means of the network-based ringback available on the MAS.
The VRDN discriminator for the SN06 CS 2100 is illustrated in the following
example.
<?xml version="1.0" encoding="UTF-8"?>
<<!-- edited with XML Spy v3.5 NT (
www.xmlspy.com
) by
Author (Nortel Networks, Corp.) -->
<<!DOCTYPE DEVICE SYSTEM "Discriminator.dtd">
<<DEVICE NAME="cs2k">
<SIGNALING>
<REQUEST ALLOWED="True">
<METHOD VALUE="Bye"/>
<METHOD VALUE="Cancel"/>
<METHOD VALUE="Invite"/>
<METHOD VALUE="Ack"/>
</REQUEST>
<REDIRECTRESP ALLOWED="False"/>
<HEADERS ALLOWED="False">
<HNAME VALUE="referred-by"/>
<HNAME VALUE="contact"/>
<HNAME VALUE="accept"/>
<HNAME VALUE="expires"/>
<HNAME VALUE="History-Info"/>
<HNAME VALUE="x-nt-party-id"/>
<HNAME VALUE="x-nt-location"/>
<HNAME VALUE="Call-Info"/>
Nortel Media Application Server
Media Application Server Planning and Engineering
NN42020-201
01.04
Standard
4.0
27 July 2007
Copyright © 2007, Nortel Networks
.
