ITU-T H.450.4
Call hold supplementary service for ITU-T H.323 systems
| Organization: | ITU-T |
| Publication Date: | 1 March 2013 |
| Status: | active |
| Page Count: | 30 |
scope:
This Recommendation specifies the Call Hold supplementary service (SS-HOLD), which is applicable to various basic services supported by ITU-T H.323 Multimedia Endpoints.
SS-HOLD enables the Served (Holding) User A to put User B (with whom User A has an active call) into a hold condition (Held User) and subsequently to retrieve that User again.
During this hold condition, User B may be provided with music and/or video on hold. The Served (Holding) User A may perform other actions while User B is being held, e.g., consulting with another User C.
The call between User A and User B has to be in the active state before SS-HOLD may be invoked. This Recommendation makes use of the "Generic functional protocol for the support of supplementary services in ITU-T H.323 systems" as defined in Recommendation ITU-T H.450.1.
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