GB2024481B - Exchange controlled alarm detection systemj - Google Patents

Exchange controlled alarm detection systemj

Info

Publication number
GB2024481B
GB2024481B GB7920804A GB7920804A GB2024481B GB 2024481 B GB2024481 B GB 2024481B GB 7920804 A GB7920804 A GB 7920804A GB 7920804 A GB7920804 A GB 7920804A GB 2024481 B GB2024481 B GB 2024481B
Authority
GB
United Kingdom
Prior art keywords
systemj
alarm detection
controlled alarm
exchange controlled
exchange
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
GB7920804A
Other versions
GB2024481A (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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB7920804A priority Critical patent/GB2024481B/en
Publication of GB2024481A publication Critical patent/GB2024481A/en
Application granted granted Critical
Publication of GB2024481B publication Critical patent/GB2024481B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB7920804A 1978-06-24 1979-06-14 Exchange controlled alarm detection systemj Expired GB2024481B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7920804A GB2024481B (en) 1978-06-24 1979-06-14 Exchange controlled alarm detection systemj

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7827816 1978-06-24
GB7920804A GB2024481B (en) 1978-06-24 1979-06-14 Exchange controlled alarm detection systemj

Publications (2)

Publication Number Publication Date
GB2024481A GB2024481A (en) 1980-01-09
GB2024481B true GB2024481B (en) 1982-07-07

Family

ID=26268047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7920804A Expired GB2024481B (en) 1978-06-24 1979-06-14 Exchange controlled alarm detection systemj

Country Status (1)

Country Link
GB (1) GB2024481B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047267A4 (en) * 1980-03-10 1982-07-12 Denis James Morgan Communication system.

Also Published As

Publication number Publication date
GB2024481A (en) 1980-01-09

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Legal Events

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