GB2280333B - Noise reduction - Google Patents

Noise reduction

Info

Publication number
GB2280333B
GB2280333B GB9314842A GB9314842A GB2280333B GB 2280333 B GB2280333 B GB 2280333B GB 9314842 A GB9314842 A GB 9314842A GB 9314842 A GB9314842 A GB 9314842A GB 2280333 B GB2280333 B GB 2280333B
Authority
GB
United Kingdom
Prior art keywords
noise reduction
noise
reduction
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 - Fee Related
Application number
GB9314842A
Other versions
GB2280333A (en
GB9314842D0 (en
Inventor
John Peter Whelan
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications 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 British Telecommunications PLC filed Critical British Telecommunications PLC
Priority to GB9314842A priority Critical patent/GB2280333B/en
Publication of GB9314842D0 publication Critical patent/GB9314842D0/en
Publication of GB2280333A publication Critical patent/GB2280333A/en
Application granted granted Critical
Publication of GB2280333B publication Critical patent/GB2280333B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB9314842A 1993-07-16 1993-07-16 Noise reduction Expired - Fee Related GB2280333B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9314842A GB2280333B (en) 1993-07-16 1993-07-16 Noise reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9314842A GB2280333B (en) 1993-07-16 1993-07-16 Noise reduction

Publications (3)

Publication Number Publication Date
GB9314842D0 GB9314842D0 (en) 1993-09-01
GB2280333A GB2280333A (en) 1995-01-25
GB2280333B true GB2280333B (en) 1997-08-06

Family

ID=10738998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9314842A Expired - Fee Related GB2280333B (en) 1993-07-16 1993-07-16 Noise reduction

Country Status (1)

Country Link
GB (1) GB2280333B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199719A (en) * 1986-12-24 1988-07-13 Mitel Corp Dc control unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199719A (en) * 1986-12-24 1988-07-13 Mitel Corp Dc control unit

Also Published As

Publication number Publication date
GB2280333A (en) 1995-01-25
GB9314842D0 (en) 1993-09-01

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Legal Events

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

Effective date: 20020716