Abstract:
Independently operated switching systems which are actuated on every call are disclosed for establishing via one system audioonly communication paths and via the other system wideband as well as audio communication paths. Initially, both systems are connected on a call and one of them is released by the caller for determining the particular switching system and therefore the necessary switching facilities to be utilized on the call.
Abstract:
A video switching system is provided for augmenting an existing audio switching system to extend video paths between customer video equipments. The video and audio paths are essentially independently established via separate switching system networks and equipment is included for coordinating and verifying each system connection to assure only matching audio and video paths are established.