GB2183423B - Telephone tone caller - Google Patents

Telephone tone caller

Info

Publication number
GB2183423B
GB2183423B GB8528886A GB8528886A GB2183423B GB 2183423 B GB2183423 B GB 2183423B GB 8528886 A GB8528886 A GB 8528886A GB 8528886 A GB8528886 A GB 8528886A GB 2183423 B GB2183423 B GB 2183423B
Authority
GB
United Kingdom
Prior art keywords
telephone tone
tone caller
caller
telephone
tone
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
GB8528886A
Other versions
GB8528886D0 (en
GB2183423A (en
Inventor
John Michael Flavin
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
Application filed by STC PLC filed Critical STC PLC
Priority to GB8528886A priority Critical patent/GB2183423B/en
Publication of GB8528886D0 publication Critical patent/GB8528886D0/en
Publication of GB2183423A publication Critical patent/GB2183423A/en
Application granted granted Critical
Publication of GB2183423B publication Critical patent/GB2183423B/en
Expired legal-status Critical Current

Links

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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB8528886A 1985-11-23 1985-11-23 Telephone tone caller Expired GB2183423B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8528886A GB2183423B (en) 1985-11-23 1985-11-23 Telephone tone caller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8528886A GB2183423B (en) 1985-11-23 1985-11-23 Telephone tone caller

Publications (3)

Publication Number Publication Date
GB8528886D0 GB8528886D0 (en) 1986-01-02
GB2183423A GB2183423A (en) 1987-06-03
GB2183423B true GB2183423B (en) 1989-10-04

Family

ID=10588668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8528886A Expired GB2183423B (en) 1985-11-23 1985-11-23 Telephone tone caller

Country Status (1)

Country Link
GB (1) GB2183423B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6399656A (en) * 1986-10-15 1988-04-30 Toshiba Corp Telephone terminal equipment
GB2287377B (en) * 1991-06-12 1995-12-13 Mitel Corp Digitally controlled ringer signal generation
IES950210A2 (en) * 1995-03-24 1995-10-18 Lake Electronic Tech A ringing voltage trigger circuit
GB2377125B (en) * 2001-06-27 2004-08-18 Nec Technologies Configurable mobile telephone light display

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875348A (en) * 1973-10-23 1975-04-01 Gte Automatic Electric Lab Inc Common audible signaling circuit
US4359610A (en) * 1978-12-29 1982-11-16 Chang Pan W Telephone ringing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875348A (en) * 1973-10-23 1975-04-01 Gte Automatic Electric Lab Inc Common audible signaling circuit
US4359610A (en) * 1978-12-29 1982-11-16 Chang Pan W Telephone ringing circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WO A1 84/03405 *

Also Published As

Publication number Publication date
GB8528886D0 (en) 1986-01-02
GB2183423A (en) 1987-06-03

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
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)
PE20 Patent expired after termination of 20 years