VIDEO INTERWORKING GATEWAY, SYSTEM AND METHOD FOR REALIZING VIDEO CALL SERVICE

摘要

A video inter-working gateway equipment and a system and a method for realizing video call service are provided, which can deal with the situation that a communication object of a H.324 entity is changed without disconnection. The system for realizing video call service includes video inter-working gateway equipment, wideband resource equipment and carrying connection equipment. The video inter-working gateway equipment performs parameter negotiation with a calling H.324 entity which needs the wideband resource equipment to perform video call service in video playback form, and obtains the negotiation parameter of the calling H.324 entity, then connects the calling H.324 entity to the wideband resource equipment. The video inter-working gateway equipment performs parameter negotiation with a called H.324 entity of video call service, obtains the negotiation parameter of the called H.324 entity, and sends the negotiation parameters of the calling H.324 entity and the called H.324 entity each other, and disconnects the calling H.324 entity and the wideband resource equipment.