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GB2176371B - Signal alert systems - Google Patents

Signal alert systems

Info

Publication number
GB2176371B
GB2176371B GB8514345A GB8514345A GB2176371B GB 2176371 B GB2176371 B GB 2176371B GB 8514345 A GB8514345 A GB 8514345A GB 8514345 A GB8514345 A GB 8514345A GB 2176371 B GB2176371 B GB 2176371B
Authority
GB
United Kingdom
Prior art keywords
alert systems
signal alert
signal
systems
alert
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
GB8514345A
Other versions
GB8514345D0 (en
GB2176371A (en
Inventor
Raymond Wood
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.)
Dodd & Co A H
Original Assignee
Dodd & Co A H
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 Dodd & Co A H filed Critical Dodd & Co A H
Priority to GB8514345A priority Critical patent/GB2176371B/en
Publication of GB8514345D0 publication Critical patent/GB8514345D0/en
Publication of GB2176371A publication Critical patent/GB2176371A/en
Application granted granted Critical
Publication of GB2176371B publication Critical patent/GB2176371B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
GB8514345A 1985-06-06 1985-06-06 Signal alert systems Expired GB2176371B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8514345A GB2176371B (en) 1985-06-06 1985-06-06 Signal alert systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8514345A GB2176371B (en) 1985-06-06 1985-06-06 Signal alert systems

Publications (3)

Publication Number Publication Date
GB8514345D0 GB8514345D0 (en) 1985-07-10
GB2176371A GB2176371A (en) 1986-12-17
GB2176371B true GB2176371B (en) 1989-05-10

Family

ID=10580304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8514345A Expired GB2176371B (en) 1985-06-06 1985-06-06 Signal alert systems

Country Status (1)

Country Link
GB (1) GB2176371B (en)

Also Published As

Publication number Publication date
GB8514345D0 (en) 1985-07-10
GB2176371A (en) 1986-12-17

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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