JPS6489653A - Communication system - Google Patents

Communication system

Info

Publication number
JPS6489653A
JPS6489653A JP24391287A JP24391287A JPS6489653A JP S6489653 A JPS6489653 A JP S6489653A JP 24391287 A JP24391287 A JP 24391287A JP 24391287 A JP24391287 A JP 24391287A JP S6489653 A JPS6489653 A JP S6489653A
Authority
JP
Japan
Prior art keywords
data
transmission
band
modulates
outputs
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
JP24391287A
Other languages
Japanese (ja)
Inventor
Tsutomu Takaku
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP24391287A priority Critical patent/JPS6489653A/en
Publication of JPS6489653A publication Critical patent/JPS6489653A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To perform telephone speech without interrupting the transmission of data by lowering a data transmission rate down to the rate at which the data is frequency-separable from a sound signal, at the time of the telephone speech during the data transmission. CONSTITUTION:At first, in a case of the transmission of only the data, a high speed modulating device 3 modulates the data so that the data can be put within the data transmission bands 8 and 11 having the center frequency of 1700Hz and the band width of A, and outputs it to a public line. On the other hand, in a case of the telephone speech during the data transmission, a low speed modulator 4 modulates the data so that the data can be put within the transmission band 9 having the center frequency of 2800Hz and the band width of A/2, and outputs it to the public line. Thus, speech communication can be performed by a communication band 10.
JP24391287A 1987-09-30 1987-09-30 Communication system Pending JPS6489653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24391287A JPS6489653A (en) 1987-09-30 1987-09-30 Communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24391287A JPS6489653A (en) 1987-09-30 1987-09-30 Communication system

Publications (1)

Publication Number Publication Date
JPS6489653A true JPS6489653A (en) 1989-04-04

Family

ID=17110855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24391287A Pending JPS6489653A (en) 1987-09-30 1987-09-30 Communication system

Country Status (1)

Country Link
JP (1) JPS6489653A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035671B2 (en) * 1977-12-06 1985-08-15 正一 石川 Board materials for modeling, their manufacturing method, and shaped objects
JPS6218164A (en) * 1985-07-16 1987-01-27 Sanyo Electric Co Ltd Drawn picture communication equipment
JPS63155861A (en) * 1986-12-19 1988-06-29 Nippon Telegr & Teleph Corp <Ntt> Picture communication equipment
JPS6477264A (en) * 1987-09-18 1989-03-23 Hitachi Telecomm Tech Voice data multiplex communication terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6035671B2 (en) * 1977-12-06 1985-08-15 正一 石川 Board materials for modeling, their manufacturing method, and shaped objects
JPS6218164A (en) * 1985-07-16 1987-01-27 Sanyo Electric Co Ltd Drawn picture communication equipment
JPS63155861A (en) * 1986-12-19 1988-06-29 Nippon Telegr & Teleph Corp <Ntt> Picture communication equipment
JPS6477264A (en) * 1987-09-18 1989-03-23 Hitachi Telecomm Tech Voice data multiplex communication terminal

Similar Documents

Publication Publication Date Title
ES2063123T3 (en) METHOD AND APPARATUS FOR THE BROADBAND TRANSMISSION OF DIGITAL SIGNALS BETWEEN, FOR EXAMPLE, A TELEPHONE CENTER AND SUBSCRIBER ADDRESSES.
AU543339B2 (en) Electronic tone ringer, for telephone subset
JPS6489653A (en) Communication system
JPS52149903A (en) Data transmitter
GB1291444A (en) A frequency modulation communication system
JPS5325309A (en) Radio call unit
JPS5541005A (en) Composite terminals
JPS51128205A (en) Telephone device
JPS5236401A (en) Time reduction method for information transmission circuit and its dev ice which used telephone circuit
JPS52153302A (en) Privacy telephone set
JPS5656053A (en) Multiplex communication system for sound signal and data or picture signal
JPS547811A (en) Noise reduction unit of companding system
JPS53117308A (en) Network telephone call system in loop shape
JPS53138203A (en) Communication system
JPS5375706A (en) Frequency modulator of carrier summing type
JPS54162905A (en) Radiotelephony equipment
JPS52101919A (en) Data transmission system
JPS535902A (en) Digital communication system
JPS54146508A (en) Cordless telephone system
JPS57145447A (en) Cordless telephone system
JPS5399803A (en) Separating signal system for subscriber&#39;s line
JPS5590172A (en) Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission
JPS52105708A (en) Talkie equipment using polyphase sound generator
JPS5235907A (en) High sound simultaneous communication unit
JPS5625866A (en) Transmission system of communication signal