JPS56161750A - Synchronizing system in telephone set - Google Patents

Synchronizing system in telephone set

Info

Publication number
JPS56161750A
JPS56161750A JP6408080A JP6408080A JPS56161750A JP S56161750 A JPS56161750 A JP S56161750A JP 6408080 A JP6408080 A JP 6408080A JP 6408080 A JP6408080 A JP 6408080A JP S56161750 A JPS56161750 A JP S56161750A
Authority
JP
Japan
Prior art keywords
circuit
control
power supply
signal
transmission
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
JP6408080A
Other languages
Japanese (ja)
Inventor
Hirozo Shintani
Takeo Oba
Eiji Morikami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP6408080A priority Critical patent/JPS56161750A/en
Publication of JPS56161750A publication Critical patent/JPS56161750A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To realize the reception of a control information surely with a simple circuit constitution and to cost, by the transmission that a control signal and a synchronizing signal to detect it can be transmitted through separated trunk line channels and extension line channels. CONSTITUTION:An incoming (trunk incoming) from a station is detected at a master device 2 and transmitted to a slave device 3 with a control signal. The power supply for the master set 2 and the slave set 3 is fed with a route of power supply 1 signal transmission line 5 LPF23, or LPF51 power supply smoothing circuit 24 or power supply smoothing circuit 52. A digital signal as the control information outputted from a control circuit 25 is input to a control circuit 55 with a route of FSK modulation/demodulation circuit 26 HPF27 signal transmission line 5 HPF53 FSK modulation/demodulation circuit 54. This is true for the transmission from the slave device 3 to the master device 2. The synchronizing information is transmitted to a control circuit 55 at the same time as the transmission of the control information with the route of FSK modulation/demodulation circuit 28 trunk line 4 FSK demodulation circuit 57.
JP6408080A 1980-05-16 1980-05-16 Synchronizing system in telephone set Pending JPS56161750A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6408080A JPS56161750A (en) 1980-05-16 1980-05-16 Synchronizing system in telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6408080A JPS56161750A (en) 1980-05-16 1980-05-16 Synchronizing system in telephone set

Publications (1)

Publication Number Publication Date
JPS56161750A true JPS56161750A (en) 1981-12-12

Family

ID=13247745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6408080A Pending JPS56161750A (en) 1980-05-16 1980-05-16 Synchronizing system in telephone set

Country Status (1)

Country Link
JP (1) JPS56161750A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031394A (en) * 1983-08-01 1985-02-18 Meisei Electric Co Ltd Synchronizing system of key telephone set
JPS62261297A (en) * 1986-05-08 1987-11-13 Taiko Denki Seisakusho:Kk Synchronizing pulse sending control system for key telephone system
JPH0494252A (en) * 1990-08-09 1992-03-26 Oki Electric Ind Co Ltd Extension communication system in isdn and isdn terminal equipment used therefor
JP2003513583A (en) * 1999-11-03 2003-04-08 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Apparatus and method for implementing a universal home network on an ISDN bus at a customer premises
JP2003513548A (en) * 1999-11-03 2003-04-08 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Apparatus and method for coupling home network signals between an analog telephone line and a digital bus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031394A (en) * 1983-08-01 1985-02-18 Meisei Electric Co Ltd Synchronizing system of key telephone set
JPS62261297A (en) * 1986-05-08 1987-11-13 Taiko Denki Seisakusho:Kk Synchronizing pulse sending control system for key telephone system
JPH0494252A (en) * 1990-08-09 1992-03-26 Oki Electric Ind Co Ltd Extension communication system in isdn and isdn terminal equipment used therefor
JP2003513583A (en) * 1999-11-03 2003-04-08 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Apparatus and method for implementing a universal home network on an ISDN bus at a customer premises
JP2003513548A (en) * 1999-11-03 2003-04-08 アドバンスト・マイクロ・ディバイシズ・インコーポレイテッド Apparatus and method for coupling home network signals between an analog telephone line and a digital bus

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