GB696503A - Voice frequency signalling system - Google Patents

Voice frequency signalling system

Info

Publication number
GB696503A
GB696503A GB948/51A GB94851A GB696503A GB 696503 A GB696503 A GB 696503A GB 948/51 A GB948/51 A GB 948/51A GB 94851 A GB94851 A GB 94851A GB 696503 A GB696503 A GB 696503A
Authority
GB
United Kingdom
Prior art keywords
line
exchange
signal
over
junction
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
GB948/51A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB696503A publication Critical patent/GB696503A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB948/51A 1950-01-12 1951-01-12 Voice frequency signalling system Expired GB696503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE696503X 1950-01-12

Publications (1)

Publication Number Publication Date
GB696503A true GB696503A (en) 1953-09-02

Family

ID=20315345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB948/51A Expired GB696503A (en) 1950-01-12 1951-01-12 Voice frequency signalling system

Country Status (3)

Country Link
BE (1) BE500568A (en:Method)
FR (1) FR1032717A (en:Method)
GB (1) GB696503A (en:Method)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564150A (en) * 1968-06-18 1971-02-16 Int Standard Electric Corp Mobile radio telephone and paging system
US3609246A (en) * 1967-05-05 1971-09-28 Int Standard Electric Corp Radiotelephone communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609246A (en) * 1967-05-05 1971-09-28 Int Standard Electric Corp Radiotelephone communication system
US3564150A (en) * 1968-06-18 1971-02-16 Int Standard Electric Corp Mobile radio telephone and paging system

Also Published As

Publication number Publication date
FR1032717A (fr) 1953-07-03
BE500568A (en:Method)

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