GB728859A - Improvements in or relating to telecommunication code selection circuits - Google Patents

Improvements in or relating to telecommunication code selection circuits

Info

Publication number
GB728859A
GB728859A GB3332/53A GB333253A GB728859A GB 728859 A GB728859 A GB 728859A GB 3332/53 A GB3332/53 A GB 3332/53A GB 333253 A GB333253 A GB 333253A GB 728859 A GB728859 A GB 728859A
Authority
GB
United Kingdom
Prior art keywords
relay
line
key
circuit
selector
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
GB3332/53A
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 GB728859A publication Critical patent/GB728859A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of DC signals of alternating polarity, coded pulses or impedance dialling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
GB3332/53A 1952-02-13 1953-02-05 Improvements in or relating to telecommunication code selection circuits Expired GB728859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE728859X 1952-02-13

Publications (1)

Publication Number Publication Date
GB728859A true GB728859A (en) 1955-04-27

Family

ID=6635828

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3332/53A Expired GB728859A (en) 1952-02-13 1953-02-05 Improvements in or relating to telecommunication code selection circuits

Country Status (3)

Country Link
BE (1) BE517550A (enrdf_load_stackoverflow)
FR (1) FR1080545A (enrdf_load_stackoverflow)
GB (1) GB728859A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR1080545A (fr) 1954-12-09
BE517550A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US4000380A (en) Toll restrictor for touch type digit selector
GB728859A (en) Improvements in or relating to telecommunication code selection circuits
US2700069A (en) Measured service telephone system
US2308637A (en) Telephone system
US3376391A (en) Connection layout for a telephone installation with keys
US1785818A (en) Telephone system
US2400148A (en) Telephone call transmitting device
US2049615A (en) Automatic switching system
US2820103A (en) Subscriber line concentrating system
US2415057A (en) Telephone system
US3299211A (en) Telephone signal reporting system
US2906998A (en) Signaling system
US2585023A (en) Testing equipment for automatic telephone systems
US2351766A (en) Telephone system
US1827734A (en) Telephone system
US3057965A (en) Braille telephone switchboard unit
JPS5644257A (en) Telephone set
US2101254A (en) Testing circuit
US2751434A (en) Automatic telephone systems provided with party lines
US1378231A (en) Automatic telephone system
US4025727A (en) Balanced tone application system
US2767250A (en) Automatic telephone exchange
US2707211A (en) Adapter circuit
US3542964A (en) Telephone call forwarding method and apparatus
JPS5810944A (ja) テレツクス通信方式