GB947767A - Improvements in or relating to automatic telephone systems - Google Patents

Improvements in or relating to automatic telephone systems

Info

Publication number
GB947767A
GB947767A GB15382/60A GB1538260A GB947767A GB 947767 A GB947767 A GB 947767A GB 15382/60 A GB15382/60 A GB 15382/60A GB 1538260 A GB1538260 A GB 1538260A GB 947767 A GB947767 A GB 947767A
Authority
GB
United Kingdom
Prior art keywords
subscriber
row
identity
speech
pulse
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
GB15382/60A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB947767A publication Critical patent/GB947767A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • 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
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Interface Circuits In Exchanges (AREA)
GB15382/60A 1959-04-30 1960-05-02 Improvements in or relating to automatic telephone systems Expired GB947767A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE422159 1959-04-30
SE840959 1959-09-10

Publications (1)

Publication Number Publication Date
GB947767A true GB947767A (en) 1964-01-29

Family

ID=26654502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15382/60A Expired GB947767A (en) 1959-04-30 1960-05-02 Improvements in or relating to automatic telephone systems

Country Status (5)

Country Link
US (1) US3112369A (US07582779-20090901-C00044.png)
BE (1) BE590059A (US07582779-20090901-C00044.png)
DE (1) DE1263860B (US07582779-20090901-C00044.png)
GB (1) GB947767A (US07582779-20090901-C00044.png)
NL (2) NL134704C (US07582779-20090901-C00044.png)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624294A (US07582779-20090901-C00044.png) * 1961-11-03
US3542956A (en) * 1967-05-31 1970-11-24 Communications Satellite Corp Pcm telephone communication system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL181666B (nl) * 1953-09-28 Degussa Inrichting voor het bereiden van ovenroet.
US2927962A (en) * 1954-04-26 1960-03-08 Bell Telephone Labor Inc Transmission systems employing quantization
BE562956A (US07582779-20090901-C00044.png) * 1956-12-05
US2986602A (en) * 1958-10-07 1961-05-30 Gen Dynamics Corp Multiplex communication system

Also Published As

Publication number Publication date
NL251071A (US07582779-20090901-C00044.png)
DE1263860B (de) 1968-03-21
US3112369A (en) 1963-11-26
BE590059A (fr) 1960-08-16
NL134704C (US07582779-20090901-C00044.png)

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