GB8319839D0 - Interface circuit - Google Patents

Interface circuit

Info

Publication number
GB8319839D0
GB8319839D0 GB838319839A GB8319839A GB8319839D0 GB 8319839 D0 GB8319839 D0 GB 8319839D0 GB 838319839 A GB838319839 A GB 838319839A GB 8319839 A GB8319839 A GB 8319839A GB 8319839 D0 GB8319839 D0 GB 8319839D0
Authority
GB
United Kingdom
Prior art keywords
interface circuit
interface
circuit
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
GB838319839A
Other versions
GB2126049A (en
GB2126049B (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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB8319839D0 publication Critical patent/GB8319839D0/en
Publication of GB2126049A publication Critical patent/GB2126049A/en
Application granted granted Critical
Publication of GB2126049B publication Critical patent/GB2126049B/en
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
    • H04B1/38—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
GB08319839A 1982-07-22 1983-07-22 Interface circuit Expired GB2126049B (en)

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 (3)

Publication Number Publication Date
GB8319839D0 true GB8319839D0 (en) 1983-08-24
GB2126049A GB2126049A (en) 1984-03-14
GB2126049B GB2126049B (en) 1985-10-02

Family

ID=3541110

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08319839A Expired GB2126049B (en) 1982-07-22 1983-07-22 Interface circuit

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.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305080A1 (en) * 1975-03-20 1976-10-15 Jeumont Schneider ELECTRONIC TERMINER
US4150260A (en) * 1975-06-18 1979-04-17 Hitachi, Ltd. Subscriber's circuit for four-wire-system local switch
CH599731A5 (en) * 1976-03-02 1978-05-31 Ibm
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
NL7802423A (en) * 1978-03-06 1979-09-10 Philips Nv POWER SUPPLY FOR A LINE CURRENT.
CH641299A5 (en) * 1978-11-13 1984-02-15 Landis & Gyr Ag Width-pause duration modulator for measurement purposes.

Also Published As

Publication number Publication date
FI832645A0 (en) 1983-07-20
FI79431B (en) 1989-08-31
DE3326037A1 (en) 1984-01-26
ATA283982A (en) 1987-03-15
MX154966A (en) 1988-01-14
BE897350A (en) 1984-01-23
ES524385A0 (en) 1984-08-01
FI79431C (en) 1989-12-11
GB2126049A (en) 1984-03-14
AU1692883A (en) 1984-01-26
FI832645A (en) 1984-01-23
CH662023A5 (en) 1987-08-31
AT384337B (en) 1987-10-27
GB2126049B (en) 1985-10-02
ES8500689A1 (en) 1984-08-01
DE3326037C2 (en) 1990-09-06

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee