GB2227628B - Call control device for telephones - Google Patents

Call control device for telephones

Info

Publication number
GB2227628B
GB2227628B GB9000949A GB9000949A GB2227628B GB 2227628 B GB2227628 B GB 2227628B GB 9000949 A GB9000949 A GB 9000949A GB 9000949 A GB9000949 A GB 9000949A GB 2227628 B GB2227628 B GB 2227628B
Authority
GB
United Kingdom
Prior art keywords
telephones
control device
call control
call
control
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
GB9000949A
Other versions
GB2227628A (en
GB9000949D0 (en
Inventor
Brian Maclean Leroy Marten
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9000949D0 publication Critical patent/GB9000949D0/en
Publication of GB2227628A publication Critical patent/GB2227628A/en
Application granted granted Critical
Publication of GB2227628B publication Critical patent/GB2227628B/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
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • 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
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
GB9000949A 1989-01-26 1990-01-16 Call control device for telephones Expired - Fee Related GB2227628B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898901680A GB8901680D0 (en) 1989-01-26 1989-01-26 Call control device for telephones

Publications (3)

Publication Number Publication Date
GB9000949D0 GB9000949D0 (en) 1990-03-14
GB2227628A GB2227628A (en) 1990-08-01
GB2227628B true GB2227628B (en) 1993-06-16

Family

ID=10650619

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898901680A Pending GB8901680D0 (en) 1989-01-26 1989-01-26 Call control device for telephones
GB9000949A Expired - Fee Related GB2227628B (en) 1989-01-26 1990-01-16 Call control device for telephones

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898901680A Pending GB8901680D0 (en) 1989-01-26 1989-01-26 Call control device for telephones

Country Status (1)

Country Link
GB (2) GB8901680D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243050B (en) * 1990-04-12 1994-06-29 Pullway Ltd Telephone call control device and method
GB2355864A (en) * 1999-10-27 2001-05-02 R W Data Ltd Switched data outlet socket assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683583A (en) * 1985-04-01 1987-07-28 Kossor Michael G Method and apparatus for controlling telephone line access
GB2219444A (en) * 1988-04-09 1989-12-06 Rathdown Ind Ltd A lockable telephone extension plug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683583A (en) * 1985-04-01 1987-07-28 Kossor Michael G Method and apparatus for controlling telephone line access
GB2219444A (en) * 1988-04-09 1989-12-06 Rathdown Ind Ltd A lockable telephone extension plug

Also Published As

Publication number Publication date
GB8901680D0 (en) 1989-03-15
GB2227628A (en) 1990-08-01
GB9000949D0 (en) 1990-03-14

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Legal Events

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

Effective date: 19960116