(Shandong Luneng Enterprise Conference TV Business Solution--(Computer Copy of Shandong Unicom Engineer) Unicom's "Bao Shitong" network structure can be divided into three layers: IP bearer layer, video exchange layer and operation support layer, of which the IP bearer layer is constructed in China Unicom On the ATM backbone network, it provides network access for video switching equipment, operation support equipment and users' "Bao Shi Tong" terminals, and also realizes the following functions: network optimization routing strategy, access control, QoS guarantee, etc. The video switching layer is composed of Unicom's MCU/GK and the user's "Bao Shitong" terminal, which realizes the switching and mixing of video and audio signals in each conference. Its attribute is that it can easily support H.323/H.320 hybrid conferences, and support "Provision" terminals of different manufacturers and different capabilities in the same conference, realize mixed network, mixed speed, mixed protocol, and provide carrier-grade quality.)
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