GB695870A - Improvements in or relating to audio frequency signalling in communication installations - Google Patents

Improvements in or relating to audio frequency signalling in communication installations

Info

Publication number
GB695870A
GB695870A GB8602/50A GB860250A GB695870A GB 695870 A GB695870 A GB 695870A GB 8602/50 A GB8602/50 A GB 8602/50A GB 860250 A GB860250 A GB 860250A GB 695870 A GB695870 A GB 695870A
Authority
GB
United Kingdom
Prior art keywords
relay
preparatory
impulsing
signal
impulses
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
GB8602/50A
Other languages
English (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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB695870A publication Critical patent/GB695870A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
GB8602/50A 1949-04-05 1950-04-05 Improvements in or relating to audio frequency signalling in communication installations Expired GB695870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP38936A DE831416C (de) 1949-04-05 1949-04-05 Tonfrequenzzeichengabe in Fernmelde-, insbesondere Fernsprechanlagen

Publications (1)

Publication Number Publication Date
GB695870A true GB695870A (en) 1953-08-19

Family

ID=27797498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8602/50A Expired GB695870A (en) 1949-04-05 1950-04-05 Improvements in or relating to audio frequency signalling in communication installations

Country Status (5)

Country Link
BE (1) BE494968A (US06262066-20010717-C00424.png)
CH (1) CH285957A (US06262066-20010717-C00424.png)
DE (1) DE831416C (US06262066-20010717-C00424.png)
FR (1) FR1019909A (US06262066-20010717-C00424.png)
GB (1) GB695870A (US06262066-20010717-C00424.png)

Also Published As

Publication number Publication date
FR1019909A (fr) 1953-01-29
BE494968A (US06262066-20010717-C00424.png)
CH285957A (de) 1952-09-30
DE831416C (de) 1952-02-14

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