JPS5590172A - Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission - Google Patents

Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission

Info

Publication number
JPS5590172A
JPS5590172A JP16114978A JP16114978A JPS5590172A JP S5590172 A JPS5590172 A JP S5590172A JP 16114978 A JP16114978 A JP 16114978A JP 16114978 A JP16114978 A JP 16114978A JP S5590172 A JPS5590172 A JP S5590172A
Authority
JP
Japan
Prior art keywords
communication
band
component
data
signal
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
JP16114978A
Other languages
Japanese (ja)
Inventor
Shozo Nakamura
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP16114978A priority Critical patent/JPS5590172A/en
Publication of JPS5590172A publication Critical patent/JPS5590172A/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
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data

Abstract

PURPOSE:To carry out a call and any other communication than the call at the same time by dividing the frequency band of a narrow-band communication circuit and then by using an intermediate band for any other purpose than the call. CONSTITUTION:Intermediate part of a sound signal component for a call is removed by a band-stopping filter, its lower frequency component 3a and higher frequency component 3b are transmitted for calling, and a signal for data communication or picture communication is transmitted by using intermediate frequency band 4 with the sound signal component removed by the filter. Here, the transmission of the higher frequency component is to reduce the lowering of articulation as much as possible. Since calling occupied-frequency width 1 of the subscriber's telephone circuit is 3100Hz between 300Hz and 3400Hz, component 3a and component 3b are used for calling being between 300Hz and 1400Hz, and 2200 and 3400Hz respectively, and the remaining band of 1400-2200Hz is used for data communication. Consequently, it is made possible to attain multiplex communication of telephone service and data, and the circuit can be utilized efficiently.
JP16114978A 1978-12-28 1978-12-28 Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission Pending JPS5590172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16114978A JPS5590172A (en) 1978-12-28 1978-12-28 Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16114978A JPS5590172A (en) 1978-12-28 1978-12-28 Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission

Publications (1)

Publication Number Publication Date
JPS5590172A true JPS5590172A (en) 1980-07-08

Family

ID=15729516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16114978A Pending JPS5590172A (en) 1978-12-28 1978-12-28 Multiplex communication system for sound signal and data for telephone call or signal for picture communication of electric communication circuit for narrow-band transmission

Country Status (1)

Country Link
JP (1) JPS5590172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01238262A (en) * 1988-03-18 1989-09-22 Miyuukomu:Kk Communication system and circuit therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01238262A (en) * 1988-03-18 1989-09-22 Miyuukomu:Kk Communication system and circuit therefor

Similar Documents

Publication Publication Date Title
EP0139405A3 (en) Data transmission system
AU570216B2 (en) Telephone call interceptor
GB2014798A (en) Telephone network/subscriber interface device
JPS5643863A (en) Facsimile equipment
AU543339B2 (en) Electronic tone ringer, for telephone subset
GB2072465B (en) Telephone transmission circuit
GB2014825B (en) Telephone subscriber apparatus
GB1546046A (en) Transmitting and receiving circuit for subscriber telephone sets
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
JPS52139302A (en) Automatic circuit switching unit
ZA816703B (en) Telephone subscriber connection circuits
GB2018093B (en) Telephone subscriber's line circuit
JPS54159114A (en) Electronic telephone circuit for subscriber channel
AU4424079A (en) Telephone handset
GB2073542B (en) Telephone handset
JPS5541005A (en) Composite terminals
AU4524879A (en) Multi-section apparatus for improving signal transmission through telephone transmission lines
JPS5656053A (en) Multiplex communication system for sound signal and data or picture signal
JPS5545299A (en) Loudspeaker telephone circuit device controlled by voice for communication facility such as telephone facility
JPS56119539A (en) Four-wire transmission system
GB2034557B (en) Transmission bridge for telephone subscriber's line circuit
JPS54162905A (en) Radiotelephony equipment
AU546508B2 (en) Loudspeaking telephone transformerless line terminating circuit
JPS54146508A (en) Cordless telephone system
JPS57145447A (en) Cordless telephone system