METHOD FOR INTERFACING A TELEPHONY AND AN ATM NETWORK TO ESTABLISH VOICE COMMUNICATION

摘要

A method is provided for establishing a communication session over a path supported at least in part by a telephony network and an ATM network. The telephony network includes ingress and egress telephony switches and the ATM network includes ingress and egress ATM switches. A first call set-up request is received at the ingress telephony switch from an originating node and the ingress telephony switch selects a first available trunk from the ingress telephony switch to the ingress ATM switch. A communications path is established over the available trunk to the ingress telephony switch. A second call set-up request is transmitted from the ingress telephony switch to the egress telephony switch and the egress telephony switch selects a second available trunk from the egress telephony switch to the egress ATM switch. A third party set-up command is transmitted from one of the telephony switches to one of the ATM switches requesting establishment of a virtual connection between the ingress and egress ATM switches over the ATM network. A virtual connection is established between the ingress and egress ATM switches. The egress telephony switch connects the second available trunk to a third trunk in communication with a destination node such that the destination node is informed of a request to establish a communication session with the originating node.