GB709406A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB709406A
GB709406A GB1971053A GB1971053A GB709406A GB 709406 A GB709406 A GB 709406A GB 1971053 A GB1971053 A GB 1971053A GB 1971053 A GB1971053 A GB 1971053A GB 709406 A GB709406 A GB 709406A
Authority
GB
United Kingdom
Prior art keywords
impulse
voice
dialled
july
automatic
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
GB1971053A
Other languages
English (en)
Inventor
Charles Edmond Beale
Gilbert Jessop Becket
John Leslie Galvin
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Publication of GB709406A publication Critical patent/GB709406A/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
    • H04Q1/446—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)
GB1971053A 1951-07-06 1951-07-06 Improvements in or relating to telephone systems Expired GB709406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1605051A GB709399A (en) 1951-07-06 1951-07-06 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB709406A true GB709406A (en) 1954-05-26

Family

ID=10070232

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1605051A Expired GB709399A (en) 1951-07-06 1951-07-06 Improvements in or relating to telephone systems
GB1971053A Expired GB709406A (en) 1951-07-06 1951-07-06 Improvements in or relating to telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1605051A Expired GB709399A (en) 1951-07-06 1951-07-06 Improvements in or relating to telephone systems

Country Status (3)

Country Link
BE (1) BE512649A (forum.php)
GB (2) GB709399A (forum.php)
NL (2) NL83809C (forum.php)

Also Published As

Publication number Publication date
NL170585B (nl)
GB709399A (en) 1954-05-26
BE512649A (forum.php)
NL83809C (forum.php)

Similar Documents

Publication Publication Date Title
GB1171833A (en) Telephone Exchange.
GB645867A (en) Telecommunication exchange
GB560807A (en) Improvements in telephone or like systems
GB709406A (en) Improvements in or relating to telephone systems
GB672149A (en) Improvements in or relating to inter-exchange system
GB1066589A (en) Telephone switching systems
JPS54154202A (en) Talking protective circuit for multi-telephone
GB680607A (en) Toll switching telephone system
GB1032966A (en) Private automatic branch exchanges
GB990545A (en) Telephone concentrator systems
US2726285A (en) Dial cord circuit
GB609474A (en) Improvements in or relating to telecommunication exchange systems
GB831617A (en) Improvements in or relating to telephone systems
GB970273A (en) A circuit arrangement for sending signals through a junction line between two automatic telephone exchanges
GB678503A (en) Party-line telecommunication system
JPS5754494A (ja) Bunsanseigyoshikijidokokankinochakushinkobunpaihoshiki
GB1143667A (forum.php)
GB1395193A (en) Telecommunications exchange systems
GB1179781A (en) Telephone Exchange System with Automatic Operation over a Carrier-Frequency Section
GB584725A (en) Improvements in or relating to telephone systems
GB1077325A (en) Line circuit
GB663587A (en) Improvements in or relating to signalling over electric pulse communication systems
FR2295592A1 (fr) Bougies d'allumage
GB1253530A (en) A communication switching system
GB574312A (en) Improvements in or relating to automatic switches for use in telephone or like systems