GB2106345B - Telephone line circuit - Google Patents

Telephone line circuit

Info

Publication number
GB2106345B
GB2106345B GB08200788A GB8200788A GB2106345B GB 2106345 B GB2106345 B GB 2106345B GB 08200788 A GB08200788 A GB 08200788A GB 8200788 A GB8200788 A GB 8200788A GB 2106345 B GB2106345 B GB 2106345B
Authority
GB
United Kingdom
Prior art keywords
telephone line
line circuit
circuit
telephone
line
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
GB08200788A
Other versions
GB2106345A (en
Inventor
Patric R Beirne
Michael C J Cowpland
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.)
Microsemi Semiconductor ULC
Original Assignee
Mitel 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
Priority claimed from CA296,137A external-priority patent/CA1105162A/en
Application filed by Mitel Corp filed Critical Mitel Corp
Priority to GB08200788A priority Critical patent/GB2106345B/en
Publication of GB2106345A publication Critical patent/GB2106345A/en
Application granted granted Critical
Publication of GB2106345B publication Critical patent/GB2106345B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • 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
    • H04B1/586—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 an electronic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
GB08200788A 1978-02-01 1982-01-12 Telephone line circuit Expired GB2106345B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08200788A GB2106345B (en) 1978-02-01 1982-01-12 Telephone line circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA296,137A CA1105162A (en) 1979-06-23 1978-02-01 Telephone line circuit
GB08200788A GB2106345B (en) 1978-02-01 1982-01-12 Telephone line circuit

Publications (2)

Publication Number Publication Date
GB2106345A GB2106345A (en) 1983-04-07
GB2106345B true GB2106345B (en) 1983-10-12

Family

ID=25668638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08200788A Expired GB2106345B (en) 1978-02-01 1982-01-12 Telephone line circuit

Country Status (1)

Country Link
GB (1) GB2106345B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254116A3 (en) * 1986-07-23 1989-09-13 Siemens Aktiengesellschaft Circuit arrangement for adaptation of a two-wire subscriber line circuit for the connection with a coupling device with single wire interconnection in telephone exchanges, especially private branch exchanges
US8107910B2 (en) * 2007-08-29 2012-01-31 Qualcomm, Incorporated Differential to single-ended conversion for radio frequency devices

Also Published As

Publication number Publication date
GB2106345A (en) 1983-04-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee