JPS5981153U - Call quality assurance circuit for button telephone equipment during power outage - Google Patents

Call quality assurance circuit for button telephone equipment during power outage

Info

Publication number
JPS5981153U
JPS5981153U JP17493782U JP17493782U JPS5981153U JP S5981153 U JPS5981153 U JP S5981153U JP 17493782 U JP17493782 U JP 17493782U JP 17493782 U JP17493782 U JP 17493782U JP S5981153 U JPS5981153 U JP S5981153U
Authority
JP
Japan
Prior art keywords
power outage
telephone
quality assurance
balanced circuit
call quality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP17493782U
Other languages
Japanese (ja)
Other versions
JPH0230949Y2 (en
Inventor
大島　節雄
望月　啓介
田中　勤二
雅明 斉藤
Original Assignee
日通工株式会社
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日通工株式会社, 日本電信電話株式会社 filed Critical 日通工株式会社
Priority to JP17493782U priority Critical patent/JPS5981153U/en
Publication of JPS5981153U publication Critical patent/JPS5981153U/en
Application granted granted Critical
Publication of JPH0230949Y2 publication Critical patent/JPH0230949Y2/ja
Granted legal-status Critical Current

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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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例を示す回路図である。 Ｎ・・・電話機、２．・・・電源供給時の平衡回路網、
Ｚ２・・・停電時の平衡回路網、ｂ・・・図面にはない
リレーＢの接点、Ｒ・・・受話器、Ｔ・・・送話器、Ｍ
Ｅ・・・主装置、Ｚｓ・・・通話回路、３１〜ａ、・−
・図面にないリレーＡの接点、Ｌ、、　Ｌ２・・・局線
。 第２図は前記ｚ１の一実施例を示す回路図、第３図は前
記Ｚ２の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention. N...Telephone, 2. ...Balanced circuit network during power supply,
Z2... Balanced circuit network during power outage, b... Contact of relay B not shown in the drawing, R... Receiver, T... Transmitter, M
E...Main device, Zs...Talking circuit, 31~a,...
・Contacts of relay A not shown in the drawing, L, L2...Station line. FIG. 2 is a circuit diagram showing an embodiment of the Z1, and FIG. 3 is a circuit diagram showing an embodiment of the Z2.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 通電時の主装置の通話路に停電時にバイパスルートを設
け１、電話機側から局線側をみたインピータンスが通電
時と停電時とて異なる電子化ボタン電話装置において、
電話機か該主装置の通話路を経由して局線に接続される
場合に設けた該電話機の第１の平衡回路網と、該電話機
が該通話路のバイパスルートて局線に接続される場合に
設けた第２の平衡回路網と、第１と第２の平衡回路網を
切替える手段とからなることを特徴とする停電時におけ
るボタン電話装置の通話品質保証回路。In an electronic button telephone device, a bypass route is provided in the case of a power outage in the communication path of the main device when the power is on, and the impedance seen from the telephone side to the central office line side is different when the power is on and during a power outage.
A first balanced circuit network of the telephone set provided when the telephone set is connected to the central office line via the telephone line of the main device, and a first balanced circuit network of the telephone set provided when the telephone set is connected to the central office line via a bypass route of the telephone line. 1. A call quality assurance circuit for a button telephone device during a power outage, comprising: a second balanced circuit network provided in the second balanced circuit network; and means for switching between the first and second balanced circuit networks.
JP17493782U 1982-11-20 1982-11-20 Call quality assurance circuit for button telephone equipment during power outage Granted JPS5981153U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17493782U JPS5981153U (en) 1982-11-20 1982-11-20 Call quality assurance circuit for button telephone equipment during power outage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17493782U JPS5981153U (en) 1982-11-20 1982-11-20 Call quality assurance circuit for button telephone equipment during power outage

Publications (2)

Publication Number Publication Date
JPS5981153U true JPS5981153U (en) 1984-06-01
JPH0230949Y2 JPH0230949Y2 (en) 1990-08-21

Family

ID=30380719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17493782U Granted JPS5981153U (en) 1982-11-20 1982-11-20 Call quality assurance circuit for button telephone equipment during power outage

Country Status (1)

Country Link
JP (1) JPS5981153U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623945U (en) * 1979-07-31 1981-03-04
JPS5686563A (en) * 1979-12-17 1981-07-14 Nec Corp Button telephone set

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623945U (en) * 1979-07-31 1981-03-04
JPS5686563A (en) * 1979-12-17 1981-07-14 Nec Corp Button telephone set

Also Published As

Publication number Publication date
JPH0230949Y2 (en) 1990-08-21

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