JPS6447149U

JPS6447149U -

Info

Publication number: JPS6447149U
Application number: JP14177587U
Authority: JP
Priority date: 1987-09-17
Filing date: 1987-09-17
Publication date: 1989-03-23

Description

[Brief explanation of the drawing]

第１図は本考案に係る電話装置の一実施例を示
すブロツク的電気回路図である。１乃至６……電話機、１′乃至６′……内線通
話路、７……クロスポイントスイツチ回路、ａ乃
至ｆ……接点、９乃至１４……呼出信号接続スイ
ツチ、１５……呼出信号発生回路、１６……ダイ
ヤル検出回路部、８……クロスポイント制御回路
、１７……中央制御回路。 FIG. 1 is a block electrical circuit diagram showing an embodiment of the telephone device according to the present invention. 1 to 6...Telephone, 1' to 6'...Extension communication path, 7...Cross point switch circuit, a to f...Contacts, 9 to 14...Call signal connection switch, 15...Call signal generation circuit , 16...Dial detection circuit section, 8...Cross point control circuit, 17...Central control circuit.

Claims

[Scope of claim for utility model registration] A plurality of telephones, a communication path that enables calls between the above-mentioned telephones,
contact means respectively provided in the communication path corresponding to each of the above-mentioned telephones; dial detection means for detecting on-hook or off-hook of the above-mentioned telephone and also detecting dial pulses sent from the off-hook telephone; contact control means for opening or closing contact means corresponding to the on-hook or off-hook telephone based on the detection of on-hook or off-hook; and the above-mentioned telephone being off-hook based on the detection of a dial pulse of the dial detecting means. a ringing signal generating means for transmitting a ringing signal to all on-hook telephones other than the telephone set, and a switch means for stopping the transmission of the ringing signal to the telephone when the telephone to which the ringing signal is being transmitted is taken off-hook. A telephone device consisting of