GB2209907B - Telephone ringing circuit - Google Patents

Telephone ringing circuit

Info

Publication number: GB2209907B
Authority: GB; United Kingdom
Prior art keywords: ringing circuit; telephone ringing; telephone; circuit; ringing
Prior art date: 1987-09-10
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

GB8818487A

Other versions

GB2209907A (en

GB8818487D0 (en

Inventor

Peter David Hargreaves

Anthony James Chatterton

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.)

Telent Technologies Services Ltd

Plessey Telecommunications Ltd

Original Assignee

Telent Technologies Services Ltd

Plessey Telecommunications Ltd

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.)

1987-09-10

Filing date

1988-08-03

Publication date

1991-05-29

1988-08-03 Application filed by Telent Technologies Services Ltd, Plessey Telecommunications Ltd filed Critical Telent Technologies Services Ltd

1988-09-07 Publication of GB8818487D0 publication Critical patent/GB8818487D0/en

1989-05-24 Publication of GB2209907A publication Critical patent/GB2209907A/en

1991-05-29 Application granted granted Critical

1991-05-29 Publication of GB2209907B publication Critical patent/GB2209907B/en

2008-08-03 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)

GB8818487A 1987-09-10 1988-08-03 Telephone ringing circuit Expired - Fee Related GB2209907B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB878721322A GB8721322D0 (en)	1987-09-10	1987-09-10	Telephone ringing circuit

Publications (3)

Publication Number	Publication Date
GB8818487D0 GB8818487D0 (en)	1988-09-07
GB2209907A GB2209907A (en)	1989-05-24
GB2209907B true GB2209907B (en)	1991-05-29

Family

ID=10623578

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
GB878721322A Pending GB8721322D0 (en)	1987-09-10	1987-09-10	Telephone ringing circuit
GB8818487A Expired - Fee Related GB2209907B (en)	1987-09-10	1988-08-03	Telephone ringing circuit

Family Applications Before (1)

Application Number	Title	Priority Date	Filing Date
GB878721322A Pending GB8721322D0 (en)	1987-09-10	1987-09-10	Telephone ringing circuit

Country Status (1)

Country	Link
GB (2)	GB8721322D0 (en)

1987
- 1987-09-10 GB GB878721322A patent/GB8721322D0/en active Pending
1988
- 1988-08-03 GB GB8818487A patent/GB2209907B/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
GB8721322D0 (en)	1987-10-14
GB2209907A (en)	1989-05-24
GB8818487D0 (en)	1988-09-07

Similar Documents

Publication	Publication Date	Title
EP0484051A3 (en)	1993-08-18	Telephone interface circuit
GB2213679B (en)	1991-06-26	Telephone station circuit
GB2206016B (en)	1991-03-27	Telephone terminal equipment
EP0323223A3 (en)	1990-08-08	Telephone interface circuit
GB2251359B (en)	1995-05-17	Telephone circuit
GB8704778D0 (en)	1987-04-01	Telephone
GB2189968B (en)	1990-01-04	Telephone interface circuit
GB2225517B (en)	1993-03-31	Telephone circuits
GB2187915B (en)	1989-11-15	Ringing circuit
GB2209907B (en)	1991-05-29	Telephone ringing circuit
EP0430578A3 (en)	1992-03-18	Telephone interface circuit
AU103090S (en)	1989-02-23	Telephone handset
GB2211376B (en)	1991-07-10	Telephone set
AU100653S (en)	1988-06-30	Telephone set
GB8721477D0 (en)	1987-10-21	Speech circuit for telephone
CA58249S (en)	1987-02-24	Telephone handset
CA57839S (en)	1987-01-13	Telephone handset
CA58036S (en)	1987-02-04	Telephone handset
CA62469S (en)	1989-02-14	Telephone answering set
AU100654S (en)	1988-06-30	Telephone handset
PL273032A1 (en)	1989-12-11	Telephone set circuit arrangement
EP0295533A3 (en)	1990-05-30	Subscriber connecting circuit
CA58778S (en)	1987-05-26	Telephone set
CA57847S (en)	1987-01-13	Telephone set
CA59784S (en)	1987-12-08	Telephone set

Legal Events

Date	Code	Title	Description
1993-03-31	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19920803