JPS60149293U

JPS60149293U - Office line extension switching circuit for button telephone equipment

Info

Publication number: JPS60149293U
Application number: JP3414784U
Authority: JP
Inventors: 牧田　雄次郎
Original assignee: 株式会社田村電機製作所
Priority date: 1984-03-12
Filing date: 1984-03-12
Publication date: 1985-10-03

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図は本考案の実施例を示し、第１図は主装置のブロック
図、第２図は第１図におけるインターフェイスの要部回
路図である。Ｌｌ、Ｌ２・・・・・・局線、置、、　ＴＥｊ２・・・
・・・電話機（ボタン電話機）、ＬＫＬ４．ＬＫＬ２・
・・・・・局線リンク゛、ＬＫ工・・・・・・内線リン
ク、ＬＫＴ・・・・・・トーンリンク、ｘｓｌ、ＸＳ２
・・・・・・ラッチングリレー、ＸＳ１゜。届占ｘｓ２゜、　ＸＳ２”−・・・・・・接点、ＣＮＴ
・・・・・・制御部、ＡＣ・・・・・・商用電源、Ｃ，
１亡・・・・コンデンサ、ＴＩＭ・・・・・・タイマー
、Ｑ工１．Ｑｌ。・・・・・・トラ、ンジスタ。 −１゛°　　　　　　尚１服　凡三千＝＝＝■力１づ１７Ｆ　　　　インター７エイ又　　　　　　　　　　
１へ、−−−１− ―會押工The figures show an embodiment of the present invention; FIG. 1 is a block diagram of the main device, and FIG. 2 is a circuit diagram of the main part of the interface in FIG. 1. Ll, L2... Central line, location, TEj2...
...Telephone (key telephone), LKL4. LKL2・
・・・・・・Station line link゛, LK work・・・・・・Extension link, LKT・・・Tone link, xsl, XS2
... Latching relay, XS1゜. Notification xs2゜, XS2”-・・・Contact, CNT
...Control unit, AC...Commercial power supply, C,
1. Capacitor, TIM... Timer, Q engineering 1. Ql. ...Tora, Njista. -1゛° 1st uniform approximately 3,000 = = = ■ force 1 zu17F Inter 7ei also
Go to 1, ---1- - Pressing

Claims

[Scope of utility model registration request]

It is equipped with a central office line link that exchanges and connects the housed central office line and a plurality of key telephones, and an extension link that exchanges and connects each of the button telephones, and in the event of a commercial power outage, a specific one of the key telephones can be connected to the In a button telephone device connected to a central office line link, a latching relay selectively connects the specific button telephone to the central office link and the extension link; a capacitor that holds a control power supply for the relay for a certain period of time; and a capacitor that is activated in response to a power outage of the power supply and controls the clutching relay by the control power supply after a predetermined time that is slightly shorter than the certain period of time to turn on the specific button telephone. A central office line extension switching circuit for a button telephone device, comprising a timer for forcibly connecting to the central office line link.