ES353890A1 - Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica. - Google Patents

Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica.

Info

Publication number
ES353890A1
ES353890A1 ES353890A ES353890A ES353890A1 ES 353890 A1 ES353890 A1 ES 353890A1 ES 353890 A ES353890 A ES 353890A ES 353890 A ES353890 A ES 353890A ES 353890 A1 ES353890 A1 ES 353890A1
Authority
ES
Spain
Prior art keywords
switching network
subscriber
translation
devices
legally binding
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
ES353890A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to ES353890A priority Critical patent/ES353890A1/es
Publication of ES353890A1 publication Critical patent/ES353890A1/es
Expired legal-status Critical Current

Links

Landscapes

  • Interface Circuits In Exchanges (AREA)
ES353890A 1968-05-14 1968-05-14 Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica. Expired ES353890A1 (es)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES353890A ES353890A1 (es) 1968-05-14 1968-05-14 Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES353890A ES353890A1 (es) 1968-05-14 1968-05-14 Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica.

Publications (1)

Publication Number Publication Date
ES353890A1 true ES353890A1 (es) 1969-10-16

Family

ID=8449025

Family Applications (1)

Application Number Title Priority Date Filing Date
ES353890A Expired ES353890A1 (es) 1968-05-14 1968-05-14 Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica.

Country Status (1)

Country Link
ES (1) ES353890A1 (es)

Similar Documents

Publication Publication Date Title
GB1297565A (es)
FR1426970A (fr) Système pour le traitement de informations commandé par programme
GB990823A (en) Time division multiplex telecommunication exchange
US3249698A (en) Pentaconta semi-electronic telephone system
GB1288917A (es)
GB1065540A (en) Circuit arrangement for dial pulse receiving facilities in a telephone exchange system
ES373468A1 (es) Circuito para un sistema de conmutacion telefonica.
US3588362A (en) Automatic digital impulse transmission system
US3626101A (en) Loop extender for subscribers connected to a central office by abnormally long telephone lines
ES353890A1 (es) Perfeccionamientos en los dispositivos de senalizacion, en particular en una central telefonica automatica.
US3576399A (en) Scanning means for central-controlled switching systems
US3065305A (en) Connecting device for private automatic branch exchanges
US3057964A (en) Multifrequency signaling receiver
US2659770A (en) Ringing control circuit for telephone systems
US3855420A (en) Supervisory circuit
GB1471364A (en) Electronic telephone system
US3604854A (en) Arrangement at a called subscriber{3 s instrument for indicating the calling instrument
US3493686A (en) Telephone switching system serving long customer loops and short customer loops
JPS5718153A (en) Plural trunk connection system
ES345366A1 (es) Circuito de identificacion de abonado que llama.
ES326301A1 (es) Una disposicion de circuito para instalaciones de conmutacion de telecomunicaciones, en especial para instalaciones de telefonia.
GB1369669A (en) Line circuits for communication systems
GB1536452A (en) Electronic telephone switching equipment
US3461246A (en) Revertive call circuit
US3231684A (en) Control register for a multi-exchange telephone system