Network telephone system and main apparatus of the network...

Details Network telephone system and main apparatus of the network... Network telephone system and main apparatus of the network...

H - Electricity

04

L

H04L 12/66 (2006.01) H04L 12/26 (2006.01) H04M 3/22 (2006.01) H04M 11/06 (2006.01) H04Q 3/64 (2006.01)

Patent

CA 2529191

A main apparatus is used in a network telephone system for connecting a plurality of main apparatuses each accommodating at least one telephone terminal, through a communication network for packet transmission. The main apparatus includes a communication unit and a detection unit. The communication unit transmits and receives a connection confirmation signal used to confirm connection between the main apparatus and another main apparatus when a connection request is issued between telephone terminals on the communication network. The connection confirmation signal is defined by a communication protocol on the communication network. The detection unit detects a connection fault on the communication network on a basis of a result of the transmitting/receiving of the connection confirmation signal by the communication unit.

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