GB2082420B - Telephone systems - Google Patents

Telephone systems

Info

Publication number
GB2082420B
GB2082420B GB8124117A GB8124117A GB2082420B GB 2082420 B GB2082420 B GB 2082420B GB 8124117 A GB8124117 A GB 8124117A GB 8124117 A GB8124117 A GB 8124117A GB 2082420 B GB2082420 B GB 2082420B
Authority
GB
United Kingdom
Prior art keywords
telephone systems
telephone
systems
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
GB8124117A
Other versions
GB2082420A (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.)
General Electric Co PLC
Original Assignee
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB8124117A priority Critical patent/GB2082420B/en
Publication of GB2082420A publication Critical patent/GB2082420A/en
Application granted granted Critical
Publication of GB2082420B publication Critical patent/GB2082420B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
GB8124117A 1980-08-06 1981-08-06 Telephone systems Expired GB2082420B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8124117A GB2082420B (en) 1980-08-06 1981-08-06 Telephone systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8025663 1980-08-06
GB8124117A GB2082420B (en) 1980-08-06 1981-08-06 Telephone systems

Publications (2)

Publication Number Publication Date
GB2082420A GB2082420A (en) 1982-03-03
GB2082420B true GB2082420B (en) 1984-05-16

Family

ID=26276472

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8124117A Expired GB2082420B (en) 1980-08-06 1981-08-06 Telephone systems

Country Status (1)

Country Link
GB (1) GB2082420B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2048217C (en) * 1991-07-31 1996-12-17 Stephen J. Boyle Abandoned call control and indication
GB0200746D0 (en) 2002-01-14 2002-02-27 Mitel Knowledge Corp Method and apparatus for establishing and maintaining voice communication among a community of interest

Also Published As

Publication number Publication date
GB2082420A (en) 1982-03-03

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Legal Events

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