JPS5558657A - Switching system - Google Patents

Switching system

Info

Publication number
JPS5558657A
JPS5558657A JP13219978A JP13219978A JPS5558657A JP S5558657 A JPS5558657 A JP S5558657A JP 13219978 A JP13219978 A JP 13219978A JP 13219978 A JP13219978 A JP 13219978A JP S5558657 A JPS5558657 A JP S5558657A
Authority
JP
Japan
Prior art keywords
pulses
pulse
terminal equipment
switch
transmission line
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
JP13219978A
Other languages
Japanese (ja)
Inventor
Katsuichi Kajima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13219978A priority Critical patent/JPS5558657A/en
Publication of JPS5558657A publication Critical patent/JPS5558657A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To switch automatically an automatic telephone set and other terminal equipments by transmitting a specific dial signal. CONSTITUTION:Pulse generator PG generates a pulse equivalent to a dial signal of 11 or more pulses, and transmission-side switch SW1 performs switching from the TEL side to the other terminal equipment side at a fixed time after transmission of this pulse. Pulses transmitted from generator PG pass through a sound band transmission line, and the number of pulses is counted by pulse detector PD. When the number of pulses reaches a set value, receiving-side switch SW2 is driven to perform switching from the TEL side to the other terminal equipment side. As a result, one sound band transmission line can be used for the telephone set and the terminal equipment effectively.
JP13219978A 1978-10-27 1978-10-27 Switching system Pending JPS5558657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13219978A JPS5558657A (en) 1978-10-27 1978-10-27 Switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13219978A JPS5558657A (en) 1978-10-27 1978-10-27 Switching system

Publications (1)

Publication Number Publication Date
JPS5558657A true JPS5558657A (en) 1980-05-01

Family

ID=15075703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13219978A Pending JPS5558657A (en) 1978-10-27 1978-10-27 Switching system

Country Status (1)

Country Link
JP (1) JPS5558657A (en)

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