GB2446095A - Telecommunications interface for providing unbalanced ringing - Google Patents

Telecommunications interface for providing unbalanced ringing

Info

Publication number
GB2446095A
GB2446095A GB0809464A GB0809464A GB2446095A GB 2446095 A GB2446095 A GB 2446095A GB 0809464 A GB0809464 A GB 0809464A GB 0809464 A GB0809464 A GB 0809464A GB 2446095 A GB2446095 A GB 2446095A
Authority
GB
United Kingdom
Prior art keywords
ringing
customer
interface
exchange
balanced
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
GB0809464A
Other versions
GB0809464D0 (en
GB2446095B (en
Inventor
Michael Davey Hoy
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
Publication of GB0809464D0 publication Critical patent/GB0809464D0/en
Publication of GB2446095A publication Critical patent/GB2446095A/en
Application granted granted Critical
Publication of GB2446095B publication Critical patent/GB2446095B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Abstract

In order to provide unbalanced ringing when an exchange line card provides a balanced ringing output the interface provides a ringing detector in circuit with a customer pair. On detecting balanced ringing signals from the line card, the interface takes over the customer line pair and provides unbalanced ringing signals to the customer and monitors for customer answer. By inserting the interface in circuit at the main distribution frame of an exchange, legacy customer premises equipment which is unable to respond to balanced signalling can be provided with an appropriate ringing signal without the necessity to provide differing line cards at the exchange.
GB0809464A 2005-12-23 2008-05-23 Telecommunications interface for providing unbalanced ringing Active GB2446095B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05258060A EP1802088A1 (en) 2005-12-23 2005-12-23 Telecommunications interface for providing unbalanced ringing
PCT/GB2006/004440 WO2007071906A1 (en) 2005-12-23 2006-11-28 Telecommunications interface for providing unbalanced ringing

Publications (3)

Publication Number Publication Date
GB0809464D0 GB0809464D0 (en) 2008-07-02
GB2446095A true GB2446095A (en) 2008-07-30
GB2446095B GB2446095B (en) 2010-01-13

Family

ID=36129897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0809464A Active GB2446095B (en) 2005-12-23 2008-05-23 Telecommunications interface for providing unbalanced ringing

Country Status (5)

Country Link
US (1) US8538007B2 (en)
EP (1) EP1802088A1 (en)
CA (1) CA2631511A1 (en)
GB (1) GB2446095B (en)
WO (1) WO2007071906A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030003A1 (en) * 1996-12-27 1998-07-09 Scientific-Atlanta, Inc. Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit
WO2000074328A2 (en) * 1999-05-28 2000-12-07 Broadcom Corporation Slic architecture and interfaces
US20040120507A1 (en) * 2002-12-18 2004-06-24 Nasser Pooladian Ring signal voltage offset for subscriber line interface circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156263A (en) * 1977-12-29 1979-05-22 Bell Telephone Laboratories, Incorporated Hazardous voltage protector for telephone line
JPS5921237B2 (en) * 1978-02-01 1984-05-18 ミテル・コ−ポレ−シヨン telephone line circuit
US7349536B1 (en) * 1999-08-31 2008-03-25 Verizon Services Corp. Techniques for providing uninterrupted digital communications to customers coupled to local loop generation equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998030003A1 (en) * 1996-12-27 1998-07-09 Scientific-Atlanta, Inc. Unbalanced ringing using a balanced ringing generator of a subscriber line interface circuit
WO2000074328A2 (en) * 1999-05-28 2000-12-07 Broadcom Corporation Slic architecture and interfaces
US20040120507A1 (en) * 2002-12-18 2004-06-24 Nasser Pooladian Ring signal voltage offset for subscriber line interface circuit

Also Published As

Publication number Publication date
US8538007B2 (en) 2013-09-17
WO2007071906B1 (en) 2007-08-16
EP1802088A1 (en) 2007-06-27
WO2007071906A1 (en) 2007-06-28
GB0809464D0 (en) 2008-07-02
US20080279365A1 (en) 2008-11-13
CA2631511A1 (en) 2007-06-28
GB2446095B (en) 2010-01-13

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