| 摘要 |
PROBLEM TO BE SOLVED: To provide multifunctional radio communication equipment which is easy to handle about ratio communication equipment for performing speech communication in accordance with visitor's calling by an interphone, etc. SOLUTION: This equipment has an outdoor master unit 3 which is arranged on an entrance and a gate and transmits a calling signal in accordance with the operation of a calling button, an indoor master unit 4 which is connected to the unit 3 through a connection line 6, can answer calling from the unit 3, also feeds power supply and can also communicate with slave units 5-1 to 5-n by spread spectrum communication and the units 5-1 to 5-n which are portable and can be communicated with the unit 4 by spread spectrum communication.
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