JPS574649A - Calling system for combined circuit of data terminal and telephone terminal - Google Patents

Calling system for combined circuit of data terminal and telephone terminal

Info

Publication number
JPS574649A
JPS574649A JP7775180A JP7775180A JPS574649A JP S574649 A JPS574649 A JP S574649A JP 7775180 A JP7775180 A JP 7775180A JP 7775180 A JP7775180 A JP 7775180A JP S574649 A JPS574649 A JP S574649A
Authority
JP
Japan
Prior art keywords
circuit
telephone
data terminal
terminal
calling
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
JP7775180A
Other languages
Japanese (ja)
Inventor
Jiro Shimada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7775180A priority Critical patent/JPS574649A/en
Publication of JPS574649A publication Critical patent/JPS574649A/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
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To install an automatic answering circuit to a telephone and the branch circuit of a data terminal, and thus the automatic answering circuit is switched to the data terminal when a special signal arrives at this circuit after receipt of an incoming call and then used as a telephone circuit when no special signal arrives. CONSTITUTION:When a call is received from a calling telephone, a call relay R of an automatic answering circuit 7 works. Then a talking becomes possible when the called subscriber picks up the handset of a telephone 1. In case a call is given from a calling data terminal, the calling system is identical with a connecting method to a telephone. Only in case a special signal is transmitted from the calling data terminal, the signal receiver REC of the circuit 7 actuates the data terminal switch relay DT to switch the telephone circuit to a data terminal 2. Thus a connection to the terminal 2 completes.
JP7775180A 1980-06-11 1980-06-11 Calling system for combined circuit of data terminal and telephone terminal Pending JPS574649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7775180A JPS574649A (en) 1980-06-11 1980-06-11 Calling system for combined circuit of data terminal and telephone terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7775180A JPS574649A (en) 1980-06-11 1980-06-11 Calling system for combined circuit of data terminal and telephone terminal

Publications (1)

Publication Number Publication Date
JPS574649A true JPS574649A (en) 1982-01-11

Family

ID=13642621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7775180A Pending JPS574649A (en) 1980-06-11 1980-06-11 Calling system for combined circuit of data terminal and telephone terminal

Country Status (1)

Country Link
JP (1) JPS574649A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524244A (en) * 1983-08-05 1985-06-18 Cygnet Technologies, Inc. Digital and voice telecommunication apparatus
JPS6269766A (en) * 1985-09-20 1987-03-31 Sharp Corp Telephone additional equipment
JPS6276353A (en) * 1985-09-27 1987-04-08 Mitsubishi Electric Corp Communication equipment
JPS62234454A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing circuit interface equipment
JPS62234452A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing line interface

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139302A (en) * 1976-05-17 1977-11-21 Japanese National Railways<Jnr> Automatic circuit switching unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52139302A (en) * 1976-05-17 1977-11-21 Japanese National Railways<Jnr> Automatic circuit switching unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524244A (en) * 1983-08-05 1985-06-18 Cygnet Technologies, Inc. Digital and voice telecommunication apparatus
JPS6269766A (en) * 1985-09-20 1987-03-31 Sharp Corp Telephone additional equipment
JPS6276353A (en) * 1985-09-27 1987-04-08 Mitsubishi Electric Corp Communication equipment
JPS62234454A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing circuit interface equipment
JPS62234452A (en) * 1986-04-04 1987-10-14 Nippon Telegr & Teleph Corp <Ntt> Plural-terminal storing line interface

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