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TS 24.615CT1
Communication Waiting (CW)
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Rapporteur:  Mr. Kreipl, Michael

This TS specifies the stage 3, Protocol Description of the Communication Waiting (CW) service, based on stage 1 and stage 2 of the ISDN call waiting supplementary services. It provides the protocol details in the IP Multimedia (IM) Core Network (CN) subsystem based on the Session Initiation Protocol (SIP) and the Session Description Protocol (SDP).
The Communication Waiting (CW) service enables a user to be informed, that very limited resources are available for an incoming communication. The user then has the choice of accepting, rejecting or ignoring the waiting call (as per basic call procedures).

full Table of Contents for  TS 24.615  Word version:   15.0.0

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1  ScopeWord-p. 6
2  References
3  Definitions and abbreviationsWord-p. 7
4  Communication Waiting (CW)Word-p. 8
4.1  Introduction
4.2  Description
4.3  Operational requirements
4.4  Coding requirementsWord-p. 9
4.5  Signalling requirements
4.6  Interaction with other servicesWord-p. 14
4.7  Parameter values (timers)Word-p. 16
4.8  Service Configuration
5  Extensions within the present documentWord-p. 17
A  Signalling flowsWord-p. 18
B  Example of Filter CriteriaWord-p. 25
C  IANA Registration templatesUp
D  Change historyWord-p. 27

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