GB2240903B - Automatic telephone call interceptor and interrogator devices - Google Patents

Automatic telephone call interceptor and interrogator devices

Info

Publication number
GB2240903B
GB2240903B GB9003261A GB9003261A GB2240903B GB 2240903 B GB2240903 B GB 2240903B GB 9003261 A GB9003261 A GB 9003261A GB 9003261 A GB9003261 A GB 9003261A GB 2240903 B GB2240903 B GB 2240903B
Authority
GB
United Kingdom
Prior art keywords
telephone call
automatic telephone
call interceptor
interrogator devices
interrogator
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
GB9003261A
Other versions
GB2240903A (en
GB9003261D0 (en
Inventor
Frans L Bezemer
Amerom Jan H M Van
Claas Cowper
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.)
PROTON COMMUNICATIONS
Original Assignee
PROTON COMMUNICATIONS
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 PROTON COMMUNICATIONS filed Critical PROTON COMMUNICATIONS
Priority to GB9003261A priority Critical patent/GB2240903B/en
Publication of GB9003261D0 publication Critical patent/GB9003261D0/en
Publication of GB2240903A publication Critical patent/GB2240903A/en
Application granted granted Critical
Publication of GB2240903B publication Critical patent/GB2240903B/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
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
GB9003261A 1990-02-13 1990-02-13 Automatic telephone call interceptor and interrogator devices Expired - Fee Related GB2240903B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9003261A GB2240903B (en) 1990-02-13 1990-02-13 Automatic telephone call interceptor and interrogator devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9003261A GB2240903B (en) 1990-02-13 1990-02-13 Automatic telephone call interceptor and interrogator devices

Publications (3)

Publication Number Publication Date
GB9003261D0 GB9003261D0 (en) 1990-04-11
GB2240903A GB2240903A (en) 1991-08-14
GB2240903B true GB2240903B (en) 1994-07-13

Family

ID=10670920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9003261A Expired - Fee Related GB2240903B (en) 1990-02-13 1990-02-13 Automatic telephone call interceptor and interrogator devices

Country Status (1)

Country Link
GB (1) GB2240903B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660571A1 (en) * 1993-06-15 1995-06-28 Texas Instruments Incorporated Automatic call screening for answering machines and smart telephones
BE1008117A3 (en) * 1994-03-18 1996-01-23 Vens Jean Telephone protection device
ES2103638B1 (en) * 1994-05-19 1998-05-01 Aprovisionamiento De Zumos Nat APPARATUS FOR TELEPHONE ACCESS CONTROL.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037540A (en) * 1978-05-30 1980-07-09 Toledo P De Monitoring device for monitoring telephone calls coming through a subscriber station
GB2062410A (en) * 1979-10-25 1981-05-20 Standard Telephones Cables Ltd Call barring arrangement
US4639552A (en) * 1985-03-08 1987-01-27 Leon Hall Apparatus for converting a standard telephone to an unlisted number telephone
GB2203614A (en) * 1987-04-09 1988-10-19 British Broadcasting Corp Control of access to a telephone
US4802202A (en) * 1986-09-10 1989-01-31 Sanyo Electric Co., Ltd. Telephone call selector
US4817133A (en) * 1986-09-16 1989-03-28 Sanyo Electric Co., Ltd. Party selecting circuit arrangement
US4845743A (en) * 1986-09-12 1989-07-04 Lutz Joseph M System for selectively receiving telephone calls

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037540A (en) * 1978-05-30 1980-07-09 Toledo P De Monitoring device for monitoring telephone calls coming through a subscriber station
GB2062410A (en) * 1979-10-25 1981-05-20 Standard Telephones Cables Ltd Call barring arrangement
US4639552A (en) * 1985-03-08 1987-01-27 Leon Hall Apparatus for converting a standard telephone to an unlisted number telephone
US4802202A (en) * 1986-09-10 1989-01-31 Sanyo Electric Co., Ltd. Telephone call selector
US4845743A (en) * 1986-09-12 1989-07-04 Lutz Joseph M System for selectively receiving telephone calls
US4817133A (en) * 1986-09-16 1989-03-28 Sanyo Electric Co., Ltd. Party selecting circuit arrangement
GB2203614A (en) * 1987-04-09 1988-10-19 British Broadcasting Corp Control of access to a telephone

Also Published As

Publication number Publication date
GB2240903A (en) 1991-08-14
GB9003261D0 (en) 1990-04-11

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Legal Events

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

Effective date: 19941013