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H.450 defines the Supplementary Services of H.323.
- H.450.1, Supplementary Services Framework
The supplementary services messages are exchanged by means of ROSE (Remote Operations Service Extension).
The fundamentals are explained in this paper.
- H.450.2, Call Transfer Supplementary Service
E.g. explains how a party-B can turn an active call between party-A and party-B into a call between party-A and a new party-C.
- H.450.3, Call Diversion Supplementary Service
E.g. explains how an IP phone can activate a diversion to e.g. a cell phone.
E.g. explains how an IP phone can interrogate whether it has any active diversion.
- H.450.4, Call Hold Supplementary Service
E.g. explains how a call can be put on hold an be fed with a music on hold.
- H.450.5, Call Park and Pickup Supplementary Service
Think of big warehouse, where a call is coming in at the front-desk for Mrs. Smith.
The front-desk parks the call and broadcasts via the intercom: "Mrs. Smith, please 223".
Mrs. Smith proceeds soon after to the next wall phone, dials 223 and gets the call.
- H.450.6, Call Waiting Supplementary Service
Explains how to signal a second call to an IP phone already engaged in an active call.
- H.450.7, Message Waiting Indication Supplementary Service
Explains elements related to voicebox systems and how these can be implemented by means of H.323.
- H.450.8, Name Identification Supplementary Service
Explains how names are displayed or how to intentionally call incognito.
- H.450.9, Call Completion Supplementary Service
Explains how to schedule an automatic call-back request in case of a remote party being busy in a call or being absent for a while and becoming available later on.
- H.450.10, Call Offer Supplementary Service
- H.450.11, Call Intrusion Supplementary Service
Explains how e.g. chief secretary can intentionally and legally intrude into call of her chief, in order to communicate urgent informations.
- H.450.12, Common Information Additional Network Feature for H.323
--82.141.49.78 19:30, 20 Jun 2004 (UTC)nit-RAM
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