| 摘要 |
A system for carrying packetized voice and other delay-intolerant traffic, for example, a voice call for transmission over the Internet, over a circuit switched connection when such a connection is available. Incoming packets from a packet data network are identified by a gateway node as having voice characteristics and diverted to travel over a bridge to a circuit-switched network to a terminal, instead of a packet network. This reduces the load on the packet network, which is less suited to voice-type calls than is the circuit-switched network. In the reverse direction, suitable packets generated by the terminal may be routed to the gateway node by way of the circuit-switched network under the control of the terminal itself, or under the control of the network's interface with the terminal, either under the control of the gateway node or autonomously.
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