GB1315927A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
GB1315927A
GB1315927A GB945972A GB945972A GB1315927A GB 1315927 A GB1315927 A GB 1315927A GB 945972 A GB945972 A GB 945972A GB 945972 A GB945972 A GB 945972A GB 1315927 A GB1315927 A GB 1315927A
Authority
GB
United Kingdom
Prior art keywords
signalling
binary
signals
word
speech
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
GB945972A
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 Corp
Original Assignee
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
Priority claimed from DE19712109909 external-priority patent/DE2109909C/de
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of GB1315927A publication Critical patent/GB1315927A/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
    • 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)
GB945972A 1971-03-02 1972-03-01 Telephone systems Expired GB1315927A (en)

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
GB1315927A true GB1315927A (en) 1973-05-09

Family

ID=5800298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB945972A Expired GB1315927A (en) 1971-03-02 1972-03-01 Telephone systems

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
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
IT949746B (it) 1973-06-11
NL7202120A (enExample) 1972-09-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee