GB1201093A - Improvements in or relating to telephone line loop-detecting circuits - Google Patents

Improvements in or relating to telephone line loop-detecting circuits

Info

Publication number
GB1201093A
GB1201093A GB4078667A GB4078667A GB1201093A GB 1201093 A GB1201093 A GB 1201093A GB 4078667 A GB4078667 A GB 4078667A GB 4078667 A GB4078667 A GB 4078667A GB 1201093 A GB1201093 A GB 1201093A
Authority
GB
United Kingdom
Prior art keywords
relating
telephone line
detecting circuits
line loop
loop
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
GB4078667A
Inventor
Roger Sidney Nye
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB4078667A priority Critical patent/GB1201093A/en
Priority to GB963970A priority patent/GB1274957A/en
Publication of GB1201093A publication Critical patent/GB1201093A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
GB4078667A 1967-09-06 1967-09-06 Improvements in or relating to telephone line loop-detecting circuits Expired GB1201093A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4078667A GB1201093A (en) 1967-09-06 1967-09-06 Improvements in or relating to telephone line loop-detecting circuits
GB963970A GB1274957A (en) 1967-09-06 1970-02-27 Improvements in or relating to telephone line loop-detecting circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4078667A GB1201093A (en) 1967-09-06 1967-09-06 Improvements in or relating to telephone line loop-detecting circuits

Publications (1)

Publication Number Publication Date
GB1201093A true GB1201093A (en) 1970-08-05

Family

ID=10416601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4078667A Expired GB1201093A (en) 1967-09-06 1967-09-06 Improvements in or relating to telephone line loop-detecting circuits

Country Status (1)

Country Link
GB (1) GB1201093A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772477A (en) * 1972-07-17 1973-11-13 Bell Telephone Labor Inc Telephone dial pulse detection circuit
US4049919A (en) * 1976-11-03 1977-09-20 Gte Automatic Electric Laboratories Incorporated Communication system trunk circuit
US4079208A (en) * 1975-11-26 1978-03-14 The Post Office Telecommunications transmission and signalling circuits
US4297531A (en) * 1978-11-24 1981-10-27 Siemens Aktiengesellschaft Circuit for suppressing noise influences in the evaluation of signal states on transmission lines
US4389543A (en) * 1980-12-18 1983-06-21 Martus Granirer Telephone-activated audio control circuit
US4935959A (en) * 1989-04-28 1990-06-19 Northern Telecom Limited Two-wire telecommunications line detection arrangements

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772477A (en) * 1972-07-17 1973-11-13 Bell Telephone Labor Inc Telephone dial pulse detection circuit
US4079208A (en) * 1975-11-26 1978-03-14 The Post Office Telecommunications transmission and signalling circuits
US4049919A (en) * 1976-11-03 1977-09-20 Gte Automatic Electric Laboratories Incorporated Communication system trunk circuit
US4297531A (en) * 1978-11-24 1981-10-27 Siemens Aktiengesellschaft Circuit for suppressing noise influences in the evaluation of signal states on transmission lines
US4389543A (en) * 1980-12-18 1983-06-21 Martus Granirer Telephone-activated audio control circuit
US4935959A (en) * 1989-04-28 1990-06-19 Northern Telecom Limited Two-wire telecommunications line detection arrangements

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years