JPS5793792A - Signal transmission system in key telephone device - Google Patents

Signal transmission system in key telephone device

Info

Publication number
JPS5793792A
JPS5793792A JP55170240A JP17024080A JPS5793792A JP S5793792 A JPS5793792 A JP S5793792A JP 55170240 A JP55170240 A JP 55170240A JP 17024080 A JP17024080 A JP 17024080A JP S5793792 A JPS5793792 A JP S5793792A
Authority
JP
Japan
Prior art keywords
circuit
pulse
pulse train
transmitted
answer
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
JP55170240A
Other languages
Japanese (ja)
Inventor
Toru Kuroki
Tsunetaka Sakata
Toshifumi Eto
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
Iwasaki Tsushinki KK
Original Assignee
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
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, Iwasaki Tsushinki KK filed Critical Iwatsu Electric Co Ltd
Priority to JP55170240A priority Critical patent/JPS5793792A/en
Publication of JPS5793792A publication Critical patent/JPS5793792A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To simplify the device and to reduce the cost, by controlling the 1st count means in a main device and the 2nd count means in each telephone set are made to be synchronizing. CONSTITUTION:Counter circuits 4, 10 are activated with a basic clock pulse of the same timing from clock pulse generating circuits 5, 11. When a pulse indicating the state of count of the circuit 4 is applied to a start pulse train generating circuit 1, start pulse trains of a plurality of bits of constitution predetermined from the output are formed and transmitted to a telephone set via a transmission line 13. The pulse trains are received at a start pulse generating circuit 7 and the counter circuit 10. The circuit 10 starts a data output circuit 8. The transmitted data ME KT from the main device is transmitted to the circuit 8 via a control circuit 2 and transmission line 13, and outputted to a data output terminal. When the transmission is finished, the circuit 10 transmits an answer pulse train to an answer pulse train generating circuit 11. The circuit 11 transmits the answer pulse train to the main device via an output circuit 9 and a line 13.
JP55170240A 1980-12-04 1980-12-04 Signal transmission system in key telephone device Pending JPS5793792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55170240A JPS5793792A (en) 1980-12-04 1980-12-04 Signal transmission system in key telephone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55170240A JPS5793792A (en) 1980-12-04 1980-12-04 Signal transmission system in key telephone device

Publications (1)

Publication Number Publication Date
JPS5793792A true JPS5793792A (en) 1982-06-10

Family

ID=15901261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55170240A Pending JPS5793792A (en) 1980-12-04 1980-12-04 Signal transmission system in key telephone device

Country Status (1)

Country Link
JP (1) JPS5793792A (en)

Similar Documents

Publication Publication Date Title
JPS5793792A (en) Signal transmission system in key telephone device
JPS56158546A (en) Transmission and reception controlling circuit
JPS57210748A (en) Data transmission system
JPS55162658A (en) Synchronizing system in push-button telephone unit
JPS55147054A (en) Data transmission system
JPS54161816A (en) Time-division type information transmission device
JPS57143957A (en) Serial data transmission system
JPS5723130A (en) Interface control system
JPS5724140A (en) Signal transmission method for train
JPS6461153A (en) Data transmission system
JPS6336177B2 (en)
JPS5735446A (en) Data transmission system
JPS5734234A (en) Extension of data bus
JPS58114543A (en) Transmission and reception system for asynchronous data
SU1062759A1 (en) System for transmitting and receiving supervisory indication signals
JPS5785132A (en) Digital input circuit
JPS5690657A (en) Wire transmission system
JPS5689148A (en) Radio device of switching without instantaneous break
JPS5738040A (en) Signal transmitter
JPS51148336A (en) Pulse signal communication method and receiver
JPS5240155A (en) Process for measuring pulse information at a remote place
UA7624A1 (en) Transmitter and signal remote control receiver
JPS5620362A (en) Error information system
JPS533115A (en) Pcm terminal station unit
JPS56158548A (en) Frame synchronism returning circuit