FR2236313A1 - Converter unit for telephone channel links - allows connection of frequency and time multiplex channels - Google Patents

Converter unit for telephone channel links - allows connection of frequency and time multiplex channels

Info

Publication number
FR2236313A1
FR2236313A1 FR7324746A FR7324746A FR2236313A1 FR 2236313 A1 FR2236313 A1 FR 2236313A1 FR 7324746 A FR7324746 A FR 7324746A FR 7324746 A FR7324746 A FR 7324746A FR 2236313 A1 FR2236313 A1 FR 2236313A1
Authority
FR
France
Prior art keywords
frequency
band
converter unit
allows connection
time multiplex
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.)
Granted
Application number
FR7324746A
Other languages
French (fr)
Other versions
FR2236313B1 (en
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7324746A priority Critical patent/FR2236313A1/en
Publication of FR2236313A1 publication Critical patent/FR2236313A1/en
Application granted granted Critical
Publication of FR2236313B1 publication Critical patent/FR2236313B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

The converter, comprises an A/D unit obtaining the amplitude levels corresponding to the message to be transmitted, and a demultiplexer (6) operating at the sampling frequency of the amplitude levels. The demultiplexed sample channels (Vo-Vn) are transposed within the band of frequency multiplex group, by a pass-band filter (7) inserted in each channel, the upper frequency of which is equal to the highest frequency contained in the message, and the lower cut-off frequency being equal to an integral multiple of the sampling frequency. A modulator (8) follows the filter (7) its carrier frequency transposing the pass-band of the filter (7) into the band of the frequency multiplex group, the modulator supplying a line coupler (3).
FR7324746A 1973-07-05 1973-07-05 Converter unit for telephone channel links - allows connection of frequency and time multiplex channels Granted FR2236313A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7324746A FR2236313A1 (en) 1973-07-05 1973-07-05 Converter unit for telephone channel links - allows connection of frequency and time multiplex channels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324746A FR2236313A1 (en) 1973-07-05 1973-07-05 Converter unit for telephone channel links - allows connection of frequency and time multiplex channels

Publications (2)

Publication Number Publication Date
FR2236313A1 true FR2236313A1 (en) 1975-01-31
FR2236313B1 FR2236313B1 (en) 1976-11-12

Family

ID=9122141

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7324746A Granted FR2236313A1 (en) 1973-07-05 1973-07-05 Converter unit for telephone channel links - allows connection of frequency and time multiplex channels

Country Status (1)

Country Link
FR (1) FR2236313A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2072546A5 (en) * 1969-11-29 1971-09-24 Licentia Gmbh

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2072546A5 (en) * 1969-11-29 1971-09-24 Licentia Gmbh

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
UE GB: THE RADIO AND ELECTRONIC ENGINEER", VOL.39 NO.2, FEVRIER 1970. ARTICLE: " "INTERCONNEXION OF FREQUENCY-DIVISION AND TIME-DIVISION MULTIPLEX TRANSMISSION SYSTEMS", AUTEURS: FLOOD, PONDER: PAGES 67 A 76) *

Also Published As

Publication number Publication date
FR2236313B1 (en) 1976-11-12

Similar Documents

Publication Publication Date Title
ES470733A1 (en) Method and apparatus for signaling and framing in a time division multiplex communication system
ATE70927T1 (en) TDMA TDM INTERFACE.
GB1456103A (en) Vocoder system
GB2030822B (en) Method of and apparatus for digital audio/fdm and pcm/fdm conversion
ATE49091T1 (en) TIME-MULTIPLEX COMMUNICATION SYSTEM FOR EFFICIENT SPECTRUM UTILIZATION.
FR2236313A1 (en) Converter unit for telephone channel links - allows connection of frequency and time multiplex channels
FI60474C (en) MODULARING REQUIREMENTS FOR ADJUSTMENT OF TELEPHONE FREQUENCY MULTIPLEXSYSTEM
GB1437205A (en) Digital equipment for forming a frequency multiplex system
IE38356B1 (en) Frequency multiplex apparatus
SU1478359A1 (en) Analog-to-digital converter for signal transmission system with frequency multiplexing
GB1534470A (en) Terminal equipment for a multiplex carrier current telephone system
ES426502A1 (en) Frequency division multiplex switching system
FR2241170A1 (en) Multiplexing telephonic channels - enables the construction of a frequency multiplex group of 12 channels
FR2379207A1 (en) Establishing high priority connection in radio-electric network - involves using sequential period of silence on channels for message transmission
JPS53123013A (en) Time-division switching network of multiple connection
JPS56169951A (en) Band split type spectrum diffusion multiplex communication system
JPS5380112A (en) Time division multiplexing communication unit
JPS51130113A (en) Multiplex signal converter
FR2250250A1 (en) Switchboard-to-station telephone connecting equipment - has concentrator, time-division multiplex lines and two wire line for speech
GB1445275A (en) Telecommunications systems including
GB986425A (en) Improvements relating to carrier frequency communication apparatus
GB806087A (en) Multichannel signal system
GB602229A (en) Improvements in or relating to multi-channel carrier communication systems
GB773687A (en) Improvements in audio-frequency signalling arrangements in multiplex carrier wave telephone systems
FR2286563A1 (en) Multiple access telephone system for data - has stations connected in parallel to single loop coaxial cable

Legal Events

Date Code Title Description
ST Notification of lapse