Carrying voice traffic over broad band networks

摘要

Voice traffic is transported between first and second media gateways over a virtual channel connection incorporated in a virtual trunk group in a packet or cell based network The virtual channel connection (VCC) is agreed between the gateways via a mutual exchange of session descriptors. Typically, the VCC is selected or created by a terminating gateway, and this information is relayed in a returned session descriptor to an originating gateway so that the connection can then be established. The session descriptor may also be used to carry information whereby the gateways can negotiate an adaptation layer and/or a connection fabric to be used.