NZ182849A - Line powered sub-set for push-button calling - Google Patents

Line powered sub-set for push-button calling

Info

Publication number
NZ182849A
NZ182849A NZ182849A NZ18284976A NZ182849A NZ 182849 A NZ182849 A NZ 182849A NZ 182849 A NZ182849 A NZ 182849A NZ 18284976 A NZ18284976 A NZ 18284976A NZ 182849 A NZ182849 A NZ 182849A
Authority
NZ
New Zealand
Prior art keywords
push
line powered
powered sub
button calling
calling
Prior art date
Application number
NZ182849A
Inventor
B Athey
Original Assignee
Gen Electric 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 Gen Electric Co Ltd filed Critical Gen Electric Co Ltd
Publication of NZ182849A publication Critical patent/NZ182849A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/06—Current supply arrangements for telephone systems in which current supply sources at subordinate switching centres are charged from the main exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
NZ182849A 1975-12-16 1976-12-09 Line powered sub-set for push-button calling NZ182849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB51430/75A GB1556168A (en) 1975-12-16 1975-12-16 Telephone apparatus

Publications (1)

Publication Number Publication Date
NZ182849A true NZ182849A (en) 1981-02-11

Family

ID=10459992

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ182849A NZ182849A (en) 1975-12-16 1976-12-09 Line powered sub-set for push-button calling

Country Status (3)

Country Link
GB (1) GB1556168A (en)
NZ (1) NZ182849A (en)
ZA (1) ZA767328B (en)

Also Published As

Publication number Publication date
GB1556168A (en) 1979-11-21
ZA767328B (en) 1977-11-30

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