GB2231240B - Telecommunications access control device - Google Patents

Telecommunications access control device

Info

Publication number
GB2231240B
GB2231240B GB9008937A GB9008937A GB2231240B GB 2231240 B GB2231240 B GB 2231240B GB 9008937 A GB9008937 A GB 9008937A GB 9008937 A GB9008937 A GB 9008937A GB 2231240 B GB2231240 B GB 2231240B
Authority
GB
United Kingdom
Prior art keywords
control device
access control
telecommunications access
telecommunications
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
GB9008937A
Other versions
GB2231240A (en
GB9008937D0 (en
Inventor
Keith Anthony Treanor
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 GB9008937D0 publication Critical patent/GB9008937D0/en
Publication of GB2231240A publication Critical patent/GB2231240A/en
Application granted granted Critical
Publication of GB2231240B publication Critical patent/GB2231240B/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
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H04M1/673—Preventing unauthorised calls from a telephone set by electronic means the user being required to key in a code
GB9008937A 1989-04-20 1990-04-20 Telecommunications access control device Expired - Fee Related GB2231240B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898908917A GB8908917D0 (en) 1989-04-20 1989-04-20 Telecommunications access control device

Publications (3)

Publication Number Publication Date
GB9008937D0 GB9008937D0 (en) 1990-06-20
GB2231240A GB2231240A (en) 1990-11-07
GB2231240B true GB2231240B (en) 1993-12-08

Family

ID=10655344

Family Applications (2)

Application Number Title Priority Date Filing Date
GB898908917A Pending GB8908917D0 (en) 1989-04-20 1989-04-20 Telecommunications access control device
GB9008937A Expired - Fee Related GB2231240B (en) 1989-04-20 1990-04-20 Telecommunications access control device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB898908917A Pending GB8908917D0 (en) 1989-04-20 1989-04-20 Telecommunications access control device

Country Status (1)

Country Link
GB (2) GB8908917D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5938767A (en) * 1996-08-19 1999-08-17 Horn; Douglas Electronic information lockout system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200516A (en) * 1987-01-27 1988-08-03 Richard Drewnicki Call barring apparatus
GB2211695A (en) * 1987-10-27 1989-07-05 Gina Parmar Security device for a telephone
GB2219444A (en) * 1988-04-09 1989-12-06 Rathdown Ind Ltd A lockable telephone extension plug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200516A (en) * 1987-01-27 1988-08-03 Richard Drewnicki Call barring apparatus
GB2211695A (en) * 1987-10-27 1989-07-05 Gina Parmar Security device for a telephone
GB2219444A (en) * 1988-04-09 1989-12-06 Rathdown Ind Ltd A lockable telephone extension plug

Also Published As

Publication number Publication date
GB2231240A (en) 1990-11-07
GB9008937D0 (en) 1990-06-20
GB8908917D0 (en) 1989-06-07

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Legal Events

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

Effective date: 19940420