GB2185170B - Testing telephone lines - Google Patents

Testing telephone lines

Info

Publication number
GB2185170B
GB2185170B GB08702753A GB8702753A GB2185170B GB 2185170 B GB2185170 B GB 2185170B GB 08702753 A GB08702753 A GB 08702753A GB 8702753 A GB8702753 A GB 8702753A GB 2185170 B GB2185170 B GB 2185170B
Authority
GB
United Kingdom
Prior art keywords
telephone lines
testing telephone
testing
lines
telephone
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
GB08702753A
Other versions
GB2185170A (en
GB8702753D0 (en
Inventor
Bernard Stuart Earl Mills
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.)
STC PLC
Original Assignee
STC 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
Priority claimed from GB08330055A external-priority patent/GB2149616B/en
Application filed by STC PLC filed Critical STC PLC
Priority to GB08702753A priority Critical patent/GB2185170B/en
Publication of GB8702753D0 publication Critical patent/GB8702753D0/en
Publication of GB2185170A publication Critical patent/GB2185170A/en
Application granted granted Critical
Publication of GB2185170B publication Critical patent/GB2185170B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/301—Circuit arrangements at the subscriber's side of the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB08702753A 1983-11-10 1987-02-06 Testing telephone lines Expired GB2185170B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08702753A GB2185170B (en) 1983-11-10 1987-02-06 Testing telephone lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08330055A GB2149616B (en) 1983-11-10 1983-11-10 Testing telephone lines
GB08702753A GB2185170B (en) 1983-11-10 1987-02-06 Testing telephone lines

Publications (3)

Publication Number Publication Date
GB8702753D0 GB8702753D0 (en) 1987-03-11
GB2185170A GB2185170A (en) 1987-07-08
GB2185170B true GB2185170B (en) 1988-06-02

Family

ID=26286991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08702753A Expired GB2185170B (en) 1983-11-10 1987-02-06 Testing telephone lines

Country Status (1)

Country Link
GB (1) GB2185170B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2643200A1 (en) * 1989-02-13 1990-08-17 Cosse Guy Process for remote testing of a datacom subscriber line and corresponding installation
SE9202065L (en) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Ways to improve receiver sensitivity and speech immunity in DTMF reception

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2341224C3 (en) * 1973-08-16 1982-01-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method for frequency recognition in selective character receivers for telecommunication systems, in particular telephone systems
US4061885A (en) * 1975-12-17 1977-12-06 Motorola, Inc. Digital tone decoder
GB1520589A (en) * 1976-06-17 1978-08-09 Gen Instr Microelect Multi-frequency receiver circuits

Also Published As

Publication number Publication date
GB2185170A (en) 1987-07-08
GB8702753D0 (en) 1987-03-11

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee