| 摘要 |
PROBLEM TO BE SOLVED: To select a desired communication network without performing any special operation. SOLUTION: An apparatus is equipped with a 1st switch which is provided between a PSTN, an ADSL, and a LAN and a telephone set and connects the telephone set to the PSTN, ADSL, or LAN, a receiving means (S03) which receives a sent signal from the telephone set, a storage part which previously stores a correspondence table wherein the correspondence between the sent signal and a communication network is defined, and a determining means (S09) which determines a communication network where the telephone set should be connected by retrieval from the corresponding table using the received sent signal. Consequently, the communication network to be connected to is determined only by receiving the sent signal. COPYRIGHT: (C)2003,JPO
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