GB712013A - Improvements in or relating to circuit arrangements for automatic telephone installations - Google Patents

Improvements in or relating to circuit arrangements for automatic telephone installations

Info

Publication number
GB712013A
GB712013A GB18689/52A GB1868952A GB712013A GB 712013 A GB712013 A GB 712013A GB 18689/52 A GB18689/52 A GB 18689/52A GB 1868952 A GB1868952 A GB 1868952A GB 712013 A GB712013 A GB 712013A
Authority
GB
United Kingdom
Prior art keywords
outlet
selector
pulses
busy
relating
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
GB18689/52A
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 Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Corp filed Critical Siemens and Halske AG
Publication of GB712013A publication Critical patent/GB712013A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
GB18689/52A 1951-12-13 1952-07-23 Improvements in or relating to circuit arrangements for automatic telephone installations Expired GB712013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE304209X 1951-12-13

Publications (1)

Publication Number Publication Date
GB712013A true GB712013A (en) 1954-07-14

Family

ID=6116240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18689/52A Expired GB712013A (en) 1951-12-13 1952-07-23 Improvements in or relating to circuit arrangements for automatic telephone installations

Country Status (5)

Country Link
US (1) US2744164A (en:Method)
BE (1) BE514161A (en:Method)
CH (1) CH304209A (en:Method)
FR (1) FR1062981A (en:Method)
GB (1) GB712013A (en:Method)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL57800C (nl) * 1941-04-15 1946-07-15 Bell Telephone Manf Co Sa Electrisch seinstelsel
NL55386C (en:Method) * 1941-06-21
FR960696A (en:Method) * 1942-06-15 1950-04-22

Also Published As

Publication number Publication date
BE514161A (en:Method)
CH304209A (de) 1954-12-31
US2744164A (en) 1956-05-01
FR1062981A (fr) 1954-04-28

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