IT949746B - Sistema di selezione digitale a tastiera per apparecchi telefoni ci di utente che lavorano con modulazione a delta - Google Patents

Sistema di selezione digitale a tastiera per apparecchi telefoni ci di utente che lavorano con modulazione a delta

Info

Publication number
IT949746B
IT949746B IT2124072A IT2124072A IT949746B IT 949746 B IT949746 B IT 949746B IT 2124072 A IT2124072 A IT 2124072A IT 2124072 A IT2124072 A IT 2124072A IT 949746 B IT949746 B IT 949746B
Authority
IT
Italy
Prior art keywords
user
selection system
delta modulation
telephones
digital selection
Prior art date
Application number
IT2124072A
Other languages
English (en)
Italian (it)
Original Assignee
Siemens Ag
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
Priority claimed from DE19712109909 external-priority patent/DE2109909C/de
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of IT949746B publication Critical patent/IT949746B/it

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
    • 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
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Time-Division Multiplex Systems (AREA)
IT2124072A 1971-03-02 1972-03-01 Sistema di selezione digitale a tastiera per apparecchi telefoni ci di utente che lavorano con modulazione a delta IT949746B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712109909 DE2109909C (de) 1971-03-02 Digitales Tastwahlsystem für mit Deltamodulation arbeitende Fernsprech-Teilnehmerstellen

Publications (1)

Publication Number Publication Date
IT949746B true IT949746B (it) 1973-06-11

Family

ID=5800298

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2124072A IT949746B (it) 1971-03-02 1972-03-01 Sistema di selezione digitale a tastiera per apparecchi telefoni ci di utente che lavorano con modulazione a delta

Country Status (9)

Country Link
AT (1) AT323813B (enExample)
BE (1) BE780132A (enExample)
CH (1) CH537133A (enExample)
FR (1) FR2127852A5 (enExample)
GB (1) GB1315927A (enExample)
IT (1) IT949746B (enExample)
LU (1) LU64863A1 (enExample)
NL (1) NL7202120A (enExample)
SE (1) SE369019B (enExample)

Also Published As

Publication number Publication date
DE2109909A1 (enExample) 1972-08-24
CH537133A (de) 1973-05-15
DE2109909B2 (de) 1972-08-24
GB1315927A (en) 1973-05-09
AT323813B (de) 1975-07-25
SE369019B (enExample) 1974-07-29
LU64863A1 (enExample) 1972-07-05
FR2127852A5 (enExample) 1972-10-13
BE780132A (fr) 1972-09-04
NL7202120A (enExample) 1972-09-05

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