AT384337B - INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS - Google Patents

INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS

Info

Publication number
AT384337B
AT384337B AT283982A AT283982A AT384337B AT 384337 B AT384337 B AT 384337B AT 283982 A AT283982 A AT 283982A AT 283982 A AT283982 A AT 283982A AT 384337 B AT384337 B AT 384337B
Authority
AT
Austria
Prior art keywords
wire
interface switching
conversion
pabx systems
telephone
Prior art date
Application number
AT283982A
Other languages
German (de)
Other versions
ATA283982A (en
Inventor
Erich Ing Naiwirt
Original Assignee
Alcatel Austria Ag
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 Austria Ag filed Critical Alcatel Austria Ag
Priority to AT283982A priority Critical patent/AT384337B/en
Priority to MX19804083A priority patent/MX154966A/en
Priority to AU16928/83A priority patent/AU1692883A/en
Priority to FI832645A priority patent/FI79431C/en
Priority to DE19833326037 priority patent/DE3326037A1/en
Priority to CH399583A priority patent/CH662023A5/en
Priority to BE2/60166A priority patent/BE897350A/en
Priority to ES524385A priority patent/ES8500689A1/en
Priority to GB08319839A priority patent/GB2126049B/en
Publication of ATA283982A publication Critical patent/ATA283982A/en
Application granted granted Critical
Publication of AT384337B publication Critical patent/AT384337B/en

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
    • H04B1/38—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
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/587—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using opto-couplers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/50—Conversion between different kinds of signals
AT283982A 1982-07-22 1982-07-22 INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS AT384337B (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
AT283982A AT384337B (en) 1982-07-22 1982-07-22 INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS
MX19804083A MX154966A (en) 1982-07-22 1983-07-14 IMPROVEMENTS TO THE INTERFACE CIRCUIT FOR A TELEPHONE TRANSMISSION SYSTEM
AU16928/83A AU1692883A (en) 1982-07-22 1983-07-18 Hybrid circuit
DE19833326037 DE3326037A1 (en) 1982-07-22 1983-07-20 CIRCUIT ARRANGEMENT FOR ANALOGUE TRANSMISSION OF VOICE SIGNALS AND COMMUNICATION TAGS
FI832645A FI79431C (en) 1982-07-22 1983-07-20 KOPPLINGSANORDNING MED TVAOTRAODS-FYRTRAODSOMVANDLING.
CH399583A CH662023A5 (en) 1982-07-22 1983-07-21 CIRCUIT ARRANGEMENT FOR ANALOGUE TRANSMISSION OF VOICE SIGNALS AND MEDIATION-SPECIFIC TAGS.
BE2/60166A BE897350A (en) 1982-07-22 1983-07-22 CIRCUIT ARRANGEMENT FOR THE ANALOGUE TRANSMISSION OF CONVERSATION AND CONTROL SIGNALS,
ES524385A ES8500689A1 (en) 1982-07-22 1983-07-22 Interface circuit
GB08319839A GB2126049B (en) 1982-07-22 1983-07-22 Interface circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT283982A AT384337B (en) 1982-07-22 1982-07-22 INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS

Publications (2)

Publication Number Publication Date
ATA283982A ATA283982A (en) 1987-03-15
AT384337B true AT384337B (en) 1987-10-27

Family

ID=3541110

Family Applications (1)

Application Number Title Priority Date Filing Date
AT283982A AT384337B (en) 1982-07-22 1982-07-22 INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS

Country Status (9)

Country Link
AT (1) AT384337B (en)
AU (1) AU1692883A (en)
BE (1) BE897350A (en)
CH (1) CH662023A5 (en)
DE (1) DE3326037A1 (en)
ES (1) ES8500689A1 (en)
FI (1) FI79431C (en)
GB (1) GB2126049B (en)
MX (1) MX154966A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841814C2 (en) * 1988-12-12 1995-05-24 Ferenc J Horvath Connection circuit
ES2048683B1 (en) * 1992-11-19 1997-07-01 Univ Cordoba OPTO-COUPLING SYSTEM OF ELECTRICAL DIGITAL SIGNALS FOR PROTECTION AND ISOLATION OF ELECTRONIC DEVICES FROM STATIONARY AND TRANSITORY OVERVOLTAGES.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039766A (en) * 1975-03-20 1977-08-02 Jeumont-Schneider Electric two-to-four wire conversion circuit for use in telephone systems
DE2649024A1 (en) * 1976-03-02 1977-09-08 Ibm SUBSCRIBER CONNECTION
DE2844304A1 (en) * 1977-10-11 1979-04-12 Burr Brown Res Corp TELEPHONE INTERFACE CIRCUIT
EP0011093A1 (en) * 1978-11-13 1980-05-28 LGZ LANDIS & GYR ZUG AG Mark-to-space ratio pulse modulator
DE2627140B2 (en) * 1975-06-18 1980-09-18 Hitachi, Ltd., Tokio Hybrid circuit in subscriber circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7802423A (en) * 1978-03-06 1979-09-10 Philips Nv POWER SUPPLY FOR A LINE CURRENT.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039766A (en) * 1975-03-20 1977-08-02 Jeumont-Schneider Electric two-to-four wire conversion circuit for use in telephone systems
DE2627140B2 (en) * 1975-06-18 1980-09-18 Hitachi, Ltd., Tokio Hybrid circuit in subscriber circuit
DE2649024A1 (en) * 1976-03-02 1977-09-08 Ibm SUBSCRIBER CONNECTION
DE2844304A1 (en) * 1977-10-11 1979-04-12 Burr Brown Res Corp TELEPHONE INTERFACE CIRCUIT
EP0011093A1 (en) * 1978-11-13 1980-05-28 LGZ LANDIS & GYR ZUG AG Mark-to-space ratio pulse modulator

Also Published As

Publication number Publication date
CH662023A5 (en) 1987-08-31
FI832645A (en) 1984-01-23
DE3326037C2 (en) 1990-09-06
BE897350A (en) 1984-01-23
FI79431C (en) 1989-12-11
ATA283982A (en) 1987-03-15
MX154966A (en) 1988-01-14
ES524385A0 (en) 1984-08-01
GB2126049B (en) 1985-10-02
FI832645A0 (en) 1983-07-20
AU1692883A (en) 1984-01-26
GB2126049A (en) 1984-03-14
GB8319839D0 (en) 1983-08-24
FI79431B (en) 1989-08-31
DE3326037A1 (en) 1984-01-26
ES8500689A1 (en) 1984-08-01

Similar Documents

Publication Publication Date Title
DE3676063D1 (en) TELEPHONE LINE INTERFACE SWITCHING FOR TELECOMMUNICATION SYSTEM.
IT8320355A0 (en) TELEPHONE CALL COVERAGE ARRANGEMENT.
GB8405820D0 (en) Telephone switching system
MX147516A (en) IMPROVEMENTS TO THE CONFERENCE CIRCUIT FOR A DIGITAL TELECOMMUNICATION SWITCHING SYSTEM
GB2134749B (en) Telephone call cost calculator
FR2472896B1 (en) TELECOMMUNICATIONS SWITCHING SYSTEM
SG39590G (en) A telephone switching arrangement
DE3577255D1 (en) HANDSET FOR TELEPHONE.
DE3369445D1 (en) Circuit arrangement for telecommunication installations, especially for telephone exchange installations, with direct voltage converters
AT384337B (en) INTERFACE SWITCHING WITH TWO-WIRE-FOUR-WIRE CONVERSION FOR TELEPHONE PABX SYSTEMS
FR2523387B1 (en) TELEPHONE CONFERENCE CIRCUIT
FR2538662B1 (en) TELEPHONE SWITCHING SYSTEM
DE3686192T2 (en) SWITCHING ARRANGEMENTS FOR DIGITAL TELECOMMUNICATION SWITCHING SYSTEMS.
GB2131257B (en) Switching network with suppressed switching transients
GB2097631B (en) Time division telephone switching systems
AT384919B (en) CIRCUIT ARRANGEMENT FOR TELEPHONE NETWORKS
DE3685680D1 (en) SWITCHING FOR DIGITAL SIGNALS.
IT8567455A0 (en) SUBSCRIBER CIRCUIT CONNECTION INTERFACE FOR AUTO-SWITCHED TELEPHONE RE
GB2113043B (en) Telephone dialling system
BR8202162A (en) CONFERENCE CIRCUIT FOR NUMBER TYPE SWITCHING PHONES
ATE58985T1 (en) TELEPHONE LINE INTERFACE CIRCUIT FOR TELECOMMUNICATION SYSTEM.
IT1098032B (en) DEVICE TO PROVIDE THE CALL CURRENT IN TELECOMMUNICATIONS SYSTEMS WITH CENTRALIZED CONTROLS, ESPECIALLY IN TELEPHONE SWITCHING SYSTEMS
BR6301751U (en) DIGITAL EQUIPMENT FOR DIRECT DIALING AT A PRIVATE TELEPHONE SWITCHING CENTER
AT381424B (en) SWITCHING DEVICE FOR INTERCOM SYSTEMS, ESPECIALLY SUBSCRIBER STATIONS
KR840002490U (en) Telephone handset

Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee