JPH0475455U - - Google Patents

Info

Publication number
JPH0475455U
JPH0475455U JP11765890U JP11765890U JPH0475455U JP H0475455 U JPH0475455 U JP H0475455U JP 11765890 U JP11765890 U JP 11765890U JP 11765890 U JP11765890 U JP 11765890U JP H0475455 U JPH0475455 U JP H0475455U
Authority
JP
Japan
Prior art keywords
pseudo
transmission line
call
band ringer
sent
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.)
Pending
Application number
JP11765890U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP11765890U priority Critical patent/JPH0475455U/ja
Publication of JPH0475455U publication Critical patent/JPH0475455U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Description

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

第１図は本考案の一実施例による簡易擬似呼出
し防止装置を含むシステムを示すブロツク図、第
２図は従来の擬似呼出し防止装置を含むシステム
を示すブロツク図である。 １１……伝送路、１２……光端局装置（ＯＰＴ
）１２、１３……多重変換装置（ＭＵＸ）１３、
１４……インバンドリンガ装置（ＩＢＲ）１４、
１５……消防警察中継装置（ＦＰＲＥＰ）、１６
……電話機１６、１７……リレー回路（ＲＬ）１
７。 FIG. 1 is a block diagram showing a system including a simple pseudo call prevention device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a system including a conventional pseudo call prevention device. 11...Transmission line, 12...Optical terminal equipment (OPT)
) 12, 13...Multiple conversion device (MUX) 13,
14...In-band ringer device (IBR) 14,
15...Fire and Police Relay Equipment (FPREP), 16
... Telephone 16, 17 ... Relay circuit (RL) 1
7.

Claims (1)

【実用新案登録請求の範囲】 １ 電話機へ呼出し信号を送出するインバンドリ
ンガ装置と、該インバンドリンガ装置と伝送路と
の間に接続された多重変換装置とを有し、伝送路
断の場合に前記インバンドリンガ装置から送出さ
れる擬似呼出し信号が前記電話機へ送出されるの
を防止する簡易擬似呼出し防止装置であつて、 前記インバンドリンガ装置の送信側に、前記伝
送路断の場合に多重変換装置から送出される警報
に応答して、前記擬似呼出し信号の送出を停止す
る停止手段を挿入したことを特徴とする簡易擬似
呼出し防止装置。 ２ 前記停止手段が、前記警報に応答して接点を
開放するリレー回路である請求項１記載の簡易擬
似呼出し防止装置。[Claims for Utility Model Registration] 1. An in-band ringer device that sends a ringing signal to a telephone set, and a multiplex conversion device connected between the in-band ringer device and a transmission line, and in the case of a disconnection of the transmission line. A simple pseudo-call prevention device that prevents a pseudo-call signal sent from the in-band ringer device from being sent to the telephone set, the device including a device on the transmitting side of the in-band ringer device, in the case of the transmission line disconnection. A simple pseudo-call prevention device characterized in that a stop means for stopping the sending of the pseudo-call signal is inserted in response to an alarm sent from a multiplex conversion device. 2. The simple pseudo-call prevention device according to claim 1, wherein the stopping means is a relay circuit that opens a contact in response to the alarm.
JP11765890U 1990-11-13 1990-11-13 Pending JPH0475455U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11765890U JPH0475455U (en) 1990-11-13 1990-11-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11765890U JPH0475455U (en) 1990-11-13 1990-11-13

Publications (1)

Publication Number Publication Date
JPH0475455U true JPH0475455U (en) 1992-07-01

Family

ID=31865559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11765890U Pending JPH0475455U (en) 1990-11-13 1990-11-13

Country Status (1)

Country Link
JP (1) JPH0475455U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685949A (en) * 1979-12-14 1981-07-13 Nec Corp Carrier-frequency terminal equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685949A (en) * 1979-12-14 1981-07-13 Nec Corp Carrier-frequency terminal equipment

Similar Documents

Publication Publication Date Title
JPS61264947A (en) Apparatus for forming voice conversation link
JPH0475455U (en)
JPS628061B2 (en)
JPS6413847A (en) Emergency call unit
JPH0451111B2 (en)
JPS5977750A (en) Telephone transfer device with incoming announcement
JPS62281648A (en) Automatic telephone answering equipment
JPS6259948B2 (en)
JPS5924595B2 (en) Central line holding system
JPH0434611Y2 (en)
JPH0426266B2 (en)
JP2990888B2 (en) False response signal monitoring circuit
JPS609260A (en) Proxy response system
JPS63151096U (en)
JPH01186047A (en) Howler signal transmission system
JPH03278667A (en) Talking line setting system
JPS639260A (en) Sending system for call waiting incoming call service sender side identification tone
JPH03166895A (en) Talking propriety notice system for radio telephone set
JPS6291051A (en) Interruption talking system
JPH0197046A (en) intercom device
JPS5945596B2 (en) Elevator emergency call device
EP0278451A3 (en) Facsimile communication having call transfer means
JPH0338156A (en) New service offering system
JPS63187759A (en) Incoming call transfer system by voice accumulating device
JPH03209933A (en) Signal system of radio telephone equipment