GB2179523B - Private telephone system - Google Patents

Private telephone system

Info

Publication number
GB2179523B
GB2179523B GB8521182A GB8521182A GB2179523B GB 2179523 B GB2179523 B GB 2179523B GB 8521182 A GB8521182 A GB 8521182A GB 8521182 A GB8521182 A GB 8521182A GB 2179523 B GB2179523 B GB 2179523B
Authority
GB
United Kingdom
Prior art keywords
telephone system
private telephone
private
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.)
Expired
Application number
GB8521182A
Other versions
GB2179523A (en
GB8521182D0 (en
Inventor
Nigel John Heath
David Eric Plews
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.)
Ferranti International PLC
Ferranti GTE Ltd
Original Assignee
Ferranti International Signal PLC
Ferranti GTE Ltd
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 Ferranti International Signal PLC, Ferranti GTE Ltd filed Critical Ferranti International Signal PLC
Priority to GB8521182A priority Critical patent/GB2179523B/en
Publication of GB8521182D0 publication Critical patent/GB8521182D0/en
Publication of GB2179523A publication Critical patent/GB2179523A/en
Application granted granted Critical
Publication of GB2179523B publication Critical patent/GB2179523B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
GB8521182A 1985-08-23 1985-08-23 Private telephone system Expired GB2179523B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8521182A GB2179523B (en) 1985-08-23 1985-08-23 Private telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8521182A GB2179523B (en) 1985-08-23 1985-08-23 Private telephone system

Publications (3)

Publication Number Publication Date
GB8521182D0 GB8521182D0 (en) 1985-10-02
GB2179523A GB2179523A (en) 1987-03-04
GB2179523B true GB2179523B (en) 1989-07-19

Family

ID=10584247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8521182A Expired GB2179523B (en) 1985-08-23 1985-08-23 Private telephone system

Country Status (1)

Country Link
GB (1) GB2179523B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2207325A (en) * 1987-06-23 1989-01-25 Boon Chen Lim Telephone with intercom facility

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1356927A (en) * 1970-10-06 1974-06-19 Post Office Telephone intercommunication systems
GB1480226A (en) * 1974-07-10 1977-07-20 Gte International Inc Telephone intercommunication systems
GB1492542A (en) * 1974-04-03 1977-11-23 Gte International Inc Telephone intercommunication system incorporating dialling arrangement
GB1501704A (en) * 1974-04-11 1978-02-22 Ericsson Telefon Ab L M Telephone installations and telephone sets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1356927A (en) * 1970-10-06 1974-06-19 Post Office Telephone intercommunication systems
GB1492542A (en) * 1974-04-03 1977-11-23 Gte International Inc Telephone intercommunication system incorporating dialling arrangement
GB1501704A (en) * 1974-04-11 1978-02-22 Ericsson Telefon Ab L M Telephone installations and telephone sets
GB1480226A (en) * 1974-07-10 1977-07-20 Gte International Inc Telephone intercommunication systems

Also Published As

Publication number Publication date
GB2179523A (en) 1987-03-04
GB8521182D0 (en) 1985-10-02

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950823