ES428810A1 - Mejoras en los sistemas duplex de comunicacion vocal. - Google Patents

Mejoras en los sistemas duplex de comunicacion vocal.

Info

Publication number
ES428810A1
ES428810A1 ES428810A ES428810A ES428810A1 ES 428810 A1 ES428810 A1 ES 428810A1 ES 428810 A ES428810 A ES 428810A ES 428810 A ES428810 A ES 428810A ES 428810 A1 ES428810 A1 ES 428810A1
Authority
ES
Spain
Prior art keywords
voice communication
bandwidth
display device
communication system
luminous display
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.)
Expired
Application number
ES428810A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana 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 Espana SA filed Critical Alcatel Espana SA
Publication of ES428810A1 publication Critical patent/ES428810A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Optical Communication System (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
ES428810A 1973-07-31 1974-07-31 Mejoras en los sistemas duplex de comunicacion vocal. Expired ES428810A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732338846 DE2338846C3 (de) 1973-07-31 1973-07-31 Sprachübertragungssystem mit einem Übertragungskanal, bei dem die Verständigung zwischen zwei Teilnehmern in beiden Richtungen möglich ist

Publications (1)

Publication Number Publication Date
ES428810A1 true ES428810A1 (es) 1976-08-16

Family

ID=5888505

Family Applications (1)

Application Number Title Priority Date Filing Date
ES428810A Expired ES428810A1 (es) 1973-07-31 1974-07-31 Mejoras en los sistemas duplex de comunicacion vocal.

Country Status (5)

Country Link
BE (1) BE818287A (fr)
DE (1) DE2338846C3 (fr)
ES (1) ES428810A1 (fr)
FR (1) FR2239824B3 (fr)
GB (1) GB1440047A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737453C2 (de) * 1977-08-19 1984-06-20 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Zeitmultiplexsystem
DE3301351A1 (de) * 1983-01-18 1984-07-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur digitalen sprachuebertragung ueber einen einzigen funkkanal
GB8322992D0 (en) * 1983-08-26 1983-09-28 Gen Electric Co Plc Line transmission systems
GB2151436A (en) * 1983-12-09 1985-07-17 Philips Electronic Associated Duplex speech transmission method and a system therefor
GB2159375A (en) * 1984-05-19 1985-11-27 Advance Electronic Prod Interrupt on priority communication systems
GB8418935D0 (en) * 1984-07-25 1984-08-30 Racal Res Ltd Duplex communications
DE3510353A1 (de) * 1985-03-22 1986-09-25 ANT Nachrichtentechnik GmbH, 7150 Backnang System zur uebertragung insbesondere von sprache
EP0538546B1 (fr) * 1986-03-25 2004-06-23 Motorola Inc. Méthode et appareil de commande d'un dispositif de communication TDM
US4949335A (en) * 1989-01-23 1990-08-14 Motorola, Inc. A TDM quasi-duplex system
EP0523366A3 (en) * 1991-06-27 1993-06-23 Siemens Aktiengesellschaft Method for reducing power consumption in the mobile part of a cordless telephone
GB9420913D0 (en) * 1994-10-17 1994-11-30 Spies Ronald W Data compression transmission and receiving apparatus to economise on call time

Also Published As

Publication number Publication date
DE2338846B2 (de) 1978-07-20
DE2338846C3 (de) 1979-03-15
GB1440047A (en) 1976-06-23
FR2239824B3 (fr) 1977-06-03
DE2338846A1 (de) 1975-02-27
BE818287A (fr) 1975-01-31
AU7177474A (en) 1976-01-29
FR2239824A1 (fr) 1975-02-28

Similar Documents

Publication Publication Date Title
ES428810A1 (es) Mejoras en los sistemas duplex de comunicacion vocal.
JPS523309A (en) Receiving system of exclusive lines in the communication exchange netw ork
CA975479A (en) D.c. compensated subscriber interface transformer for telephone system
JPS5313806A (en) Telephone extension system
JPS5225506A (en) Loud-speaker unit
CA470526A (fr) Systemes de postes groupes de telephone
AU164854B2 (en) Party line telephone systems
CA516175A (fr) Systemes selecteurs telephoniques employant un tube a decharge de gaz a circuit selectif et parlant combines et une disconnexion selective
CA435034A (fr) Systeme telephonique a haut-parleur pour conversation a distance
AU2266653A (en) Party line telephone systems
CA693166A (en) Communication channel signaling arrangement
AU494893B2 (en) Duplex voice communication system
JPS5274201A (en) Display control circuit for key telephone system
CA493399A (fr) Systemes de transmission de telephone porteur
CA686801A (en) Intra-plant voice communication system
CA909982A (en) Band limited telephone line data communication system
AU461875B2 (en) Loudspeaking telephone subset
AU160688B2 (en) Improvements in multichannel carrier transmission systems
CA871259A (en) Voice communications systems
CA508629A (fr) Systeme de telegraphe duplex employant une bande de compression
CA508628A (fr) Systeme de telegraphe duplex employant une bande de compression
CA653701A (en) Loudspeaking telephone using transistors
CA599262A (en) Party line telephone systems
JPS5653774B2 (fr)
CA887330A (en) Arrangement for establishing conference connections in communication switching systems