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.
ITU-T H.450.4-2013由国际电信联盟 IX-ITU 发布于 2013-03-01。
ITU-T H.450.4-2013 在中国标准分类中归属于: M21 各种通信业务服务。
* 在 ITU-T H.450.4-2013 发布之后有更新,请注意新发布标准的变化。
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