JPH0223182U

JPH0223182U -

Info

Publication number: JPH0223182U
Application number: JP9900688U
Authority: JP
Priority date: 1988-07-26
Filing date: 1988-07-26
Publication date: 1990-02-15

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を使用した電話交換
システムの全体構成図、第２図は同上の電話コン
セントの回路構成図、第３図は同上の主装置の回
路構成図、第４図は同上の動作説明用タイムチヤ
ート、第５図は同上の動作説明用フローチヤート
である。１は主装置、３は外線、４はドアホン子器、５
は通話線、６は信号線、７は内線、８は電話コン
セント、１０は電話機、３４は制御回路、３５は
呼び出しスイツチである。 Fig. 1 is an overall configuration diagram of a telephone exchange system using an embodiment of the present invention, Fig. 2 is a circuit configuration diagram of the telephone outlet of the same, Fig. 3 is a circuit diagram of the main device of the same, and Fig. 4 is a time chart for explaining the same operation as above, and FIG. 5 is a flow chart for explaining the same operation. 1 is the main device, 3 is the outside line, 4 is the doorphone slave unit, 5
1 is a telephone line, 6 is a signal line, 7 is an extension line, 8 is a telephone outlet, 10 is a telephone set, 34 is a control circuit, and 35 is a call switch.

Claims

[Scope of utility model registration request]

When a call is received from an external line, the telephone connected to the extension is connected to the external line, when a telephone connected to the extension calls the extension, the internal line is connected, and when a call is received from the doorphone slave, the telephone is connected to the extension. A main device that forms a communication path between the telephone line and the extension, respectively, and sends out a ring tone signal via the signal line when an extension is called or a door intercom slave device is called, and a telephone that connects the telephone to the extension from the main device. Within a predetermined period of time after the first ringing operation of the ringing switch provided on the doorbell subunit, in a telephone exchange consisting of at least a connecting means for connection, and a speaker connected to a signal line from the main device and broadcasting a ringing tone signal. If there is a re-operation, the main device is equipped with a door intercom simultaneous broadcast mode switching function that superimposes and transmits the call signal of the door intercom sub unit sent through the call line on the signal line within a certain period of time after the re-operation. Characteristic telephone exchange.