| 摘要 |
PROBLEM TO BE SOLVED: To provide an interphone system integrated with an information trunk facility in a single facility whereby the single facility is enough to build up the interphone system and the information trunk facility. SOLUTION: The interphone system is provided with: a controller 1 for performing exchange control of interphone speeches; a plurality of terminals 3a, 3b, 3c,..., subjected to the exchange control by the control apparatus to make speeches, and the control apparatus is provided with a control apparatus line concentration circuit 12 for concentrating the information trunks 5 such as a local area network LAN and accommodating them. COPYRIGHT: (C)2004,JPO
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