| 摘要 |
A telephony service system employing a cable network and a telephony service method. The system includes a directory unit, a plurality of network segment units each including a headend unit, and a plurality of routers respectively formed in each network segment unit. The directory unit stores the IP address corresponding to a telephone number of a first cable phone. The plurality of network segment units each having a headend unit read IP addresses stored in the directory unit based on a received telephone number of a second cable phone, and determine a connection audio session using an Internet protocol from the read IP address to set a call path with the first cable phone. The plurality of routers set a call path between the network segment units. According to the cable network of a packet type, unlike a PSTN network of a switch network, the local call charge is reduced. A wide bandwidth of the cable suppresses deterioration in quality of audio service of the cable network, which may be caused by compression or delay in the PSTN network.
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