JPS54131802A - Composite exchange network - Google Patents

Composite exchange network

Info

Publication number
JPS54131802A
JPS54131802A JP3958078A JP3958078A JPS54131802A JP S54131802 A JPS54131802 A JP S54131802A JP 3958078 A JP3958078 A JP 3958078A JP 3958078 A JP3958078 A JP 3958078A JP S54131802 A JPS54131802 A JP S54131802A
Authority
JP
Japan
Prior art keywords
exchange
telephone
modulator
demodulator
data
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
JP3958078A
Other languages
Japanese (ja)
Inventor
Yoshirou Nishimura
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 JP3958078A priority Critical patent/JPS54131802A/en
Publication of JPS54131802A publication Critical patent/JPS54131802A/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)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To realize the multiple communication with a single call by sending out the selected number through telephone exchange after calling out the special number corresponding to the multiple modulator/demodulator, carrying out the telephone exchange via the receiving exchange of the selected number and giving the aural multiplication to the data information via the data exchange. CONSTITUTION:Subscriber telephone 1 and data terminal 2 are connected to telephone exchange 5 via multiplying modulator/demdoulator 3, and the output side is connected to multiplying modulator/demodulator 6 and then connected to multiplying modulator/demodulator via the circuit as well as to data exchange 7. Here if the caller requests the telephone call, the procedure is identical to that of the normal telephone call. But in case the data communication is given, the special number allotted corresponding to modulator/demodulator 3 is called out and the selected number is sent out through exchange 5. And the subscriber exchange which receives the special number performs the exchange within the telephone network. On the other hand, the data information separated through modulator/ demodulator 3 receives the exchange connection through the aural multiplication system and by means of exchange 7 which is controlled by exchange 5 subordinately. Thus, the multiple communication is possible with a single call.
JP3958078A 1978-04-03 1978-04-03 Composite exchange network Pending JPS54131802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3958078A JPS54131802A (en) 1978-04-03 1978-04-03 Composite exchange network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3958078A JPS54131802A (en) 1978-04-03 1978-04-03 Composite exchange network

Publications (1)

Publication Number Publication Date
JPS54131802A true JPS54131802A (en) 1979-10-13

Family

ID=12557017

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3958078A Pending JPS54131802A (en) 1978-04-03 1978-04-03 Composite exchange network

Country Status (1)

Country Link
JP (1) JPS54131802A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972462A (en) * 1987-09-29 1990-11-20 Hitachi, Ltd. Multimedia mail system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972462A (en) * 1987-09-29 1990-11-20 Hitachi, Ltd. Multimedia mail system

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