GB8313429D0 - Telephone instruments - Google Patents

Telephone instruments

Info

Publication number
GB8313429D0
GB8313429D0 GB838313429A GB8313429A GB8313429D0 GB 8313429 D0 GB8313429 D0 GB 8313429D0 GB 838313429 A GB838313429 A GB 838313429A GB 8313429 A GB8313429 A GB 8313429A GB 8313429 D0 GB8313429 D0 GB 8313429D0
Authority
GB
United Kingdom
Prior art keywords
telephone instruments
instruments
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.)
Withdrawn
Application number
GB838313429A
Other versions
GB2123254A (en
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.)
ANSWERCALL Ltd
General Electric Co PLC
Original Assignee
ANSWERCALL Ltd
General Electric Co 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 ANSWERCALL Ltd, General Electric Co PLC filed Critical ANSWERCALL Ltd
Priority to GB08313429A priority Critical patent/GB2123254A/en
Publication of GB8313429D0 publication Critical patent/GB8313429D0/en
Publication of GB2123254A publication Critical patent/GB2123254A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/2745—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
    • H04M1/27495—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips implemented by means of discrete electronic components, i.e. neither programmable nor microprocessor-controlled
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Discrete Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB08313429A 1982-05-14 1983-05-16 Telephone instruments Withdrawn GB2123254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08313429A GB2123254A (en) 1982-05-14 1983-05-16 Telephone instruments

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8214099 1982-05-14
GB8217329 1982-06-15
GB08313429A GB2123254A (en) 1982-05-14 1983-05-16 Telephone instruments

Publications (2)

Publication Number Publication Date
GB8313429D0 true GB8313429D0 (en) 1983-06-22
GB2123254A GB2123254A (en) 1984-01-25

Family

ID=27261583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08313429A Withdrawn GB2123254A (en) 1982-05-14 1983-05-16 Telephone instruments

Country Status (1)

Country Link
GB (1) GB2123254A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE54755B1 (en) * 1983-09-08 1990-01-31 Lake Electronics Ltd Telephone security device
FR2646980A1 (en) * 1989-05-10 1990-11-16 Carreel Eric Call discriminator apparatus for telephone sets
GR900100888A (en) * 1990-12-31 1992-11-23 Nikolaos Filippakopoulos Automatic telephone selector
FR2758678B1 (en) * 1997-01-17 1999-04-16 Laurent Casado ACCESS RESTRICTION DEVICE FOR TELEPHONE SET
GB2411072A (en) * 2004-02-10 2005-08-17 Mmtel Ltd Limiting call duration according to call type and user

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045619A (en) * 1975-03-17 1977-08-30 Aristonics Corporation Telephone control system
GB1569257A (en) * 1975-11-17 1980-06-11 Murray L Q Of a telephone instrument telephone security device for preventing unauthorised use
GB1579873A (en) * 1978-05-31 1980-11-26 Murray L Q Telefone security device for preventing unauthorised use of a subscribers set
GB2104347A (en) * 1981-06-19 1983-03-02 Interaction Resources Limited Improvements in or relating to telephone sets

Also Published As

Publication number Publication date
GB2123254A (en) 1984-01-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)