JPH0260359U

JPH0260359U -

Info

Publication number: JPH0260359U
Application number: JP13933588U
Authority: JP
Priority date: 1988-10-26
Filing date: 1988-10-26
Publication date: 1990-05-02

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の報知ユニツトの回
路図、第２図は電話コンセントの回路図、第３図
は報知ユニツトの分解斜視図、第４図は報知ユニ
ツトを取付枠に取り付けた状態を示す斜視図、第
５図は電話交換システムのシステム構成図である
。１は交換装置本体、４は報知ユニツト、５は電
話コンセント、６は電話機、１０は秘話回路であ
る。 Figure 1 is a circuit diagram of a notification unit according to an embodiment of the present invention, Figure 2 is a circuit diagram of a telephone outlet, Figure 3 is an exploded perspective view of the notification unit, and Figure 4 shows the notification unit attached to the mounting frame. FIG. 5, which is a perspective view showing the state, is a system configuration diagram of the telephone exchange system. Reference numeral 1 designates the main body of the switching device, 4 a notification unit, 5 a telephone outlet, 6 a telephone set, and 10 a secret line circuit.

Claims

[Scope of utility model registration request]

The main body of the switching device is connected to the central office by an outside line and connected to the doorbell by a telephone line, and the main body of the switching device is connected to the main body of the switching device by an extension line consisting of a control line and a voice line. In a telephone switching system comprising a notification unit for displaying the extension call status and a telephone outlet connected to the telephone line of the extension, the notification unit and the telephone outlet are connected by a sending wire. A telephone switching system in which each notification unit and telephone outlet is equipped with a confidential circuit that connects only those telephones whose handset has been picked up during an outside call to the telephone line from the main body of the switching apparatus.