PT67902B - Improvements in or relating to electronic detection circuits - Google Patents

Improvements in or relating to electronic detection circuits

Info

Publication number
PT67902B
PT67902B PT67902A PT6790278A PT67902B PT 67902 B PT67902 B PT 67902B PT 67902 A PT67902 A PT 67902A PT 6790278 A PT6790278 A PT 6790278A PT 67902 B PT67902 B PT 67902B
Authority
PT
Portugal
Prior art keywords
relating
detection circuits
electronic detection
electronic
circuits
Prior art date
Application number
PT67902A
Other languages
English (en)
Other versions
PT67902A (en
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
Publication of PT67902A publication Critical patent/PT67902A/pt
Publication of PT67902B publication Critical patent/PT67902B/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
PT67902A 1977-04-26 1978-04-13 Improvements in or relating to electronic detection circuits PT67902B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17383/77A GB1583513A (en) 1977-04-26 1977-04-26 Electronic detection circuits

Publications (2)

Publication Number Publication Date
PT67902A PT67902A (en) 1978-05-01
PT67902B true PT67902B (en) 1979-10-12

Family

ID=10094235

Family Applications (1)

Application Number Title Priority Date Filing Date
PT67902A PT67902B (en) 1977-04-26 1978-04-13 Improvements in or relating to electronic detection circuits

Country Status (9)

Country Link
BR (1) BR7802565A (pt)
GB (1) GB1583513A (pt)
HK (1) HK31583A (pt)
KE (1) KE3277A (pt)
MY (1) MY8400352A (pt)
NZ (1) NZ186847A (pt)
PT (1) PT67902B (pt)
SG (1) SG49483G (pt)
ZA (1) ZA781263B (pt)

Also Published As

Publication number Publication date
HK31583A (en) 1983-09-02
BR7802565A (pt) 1979-02-13
GB1583513A (en) 1981-01-28
MY8400352A (en) 1984-12-31
SG49483G (en) 1985-03-08
KE3277A (en) 1983-05-13
ZA781263B (en) 1979-02-28
PT67902A (en) 1978-05-01
NZ186847A (en) 1982-02-23

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