| 摘要 |
PROBLEM TO BE SOLVED: To reduce traffic of D-channel by connecting a PHS connection device (1st device) and a connection controller (2nd device) with a specific basic form without setting of common use of the control channel (D-channel). SOLUTION: In the communication system conducting multiple address communication, the configuration of 'm×B-channel + D-channel' consisting of (m) (m is an integer being 1 or over) sets of information channels (B-channels) and a control channel (D channel) is used for a basic form. The 1st equipment 1 and the 2nd equipment 4 are connected by a plurality of the basic forms and all the connected D channels are used to send a setup message from the 1st equipment 1 to the 2nd equipment 4 to conduct channel call connection control. When a B channel 2 is referred to as B11, B12, a B channel 13 is referred to as B21, B22, and D channels 3, 8, 10, 14 are referred to as D11, D12, Dr1, Dr2 respectively, then the B11, B12 and D11 and the B21, B22, D12 form respectively basic interfaces (basic forms).
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