IT8622726A0 - Circuito d'interfaccia per trasmettere codici in chiave a un sistema di comunicazione telefonica centrex.! - Google Patents

Circuito d'interfaccia per trasmettere codici in chiave a un sistema di comunicazione telefonica centrex.!

Info

Publication number
IT8622726A0
IT8622726A0 IT8622726A IT2272686A IT8622726A0 IT 8622726 A0 IT8622726 A0 IT 8622726A0 IT 8622726 A IT8622726 A IT 8622726A IT 2272686 A IT2272686 A IT 2272686A IT 8622726 A0 IT8622726 A0 IT 8622726A0
Authority
IT
Italy
Prior art keywords
communication system
interface circuit
telephone communication
key codes
transmitting key
Prior art date
Application number
IT8622726A
Other languages
English (en)
Other versions
IT1214581B (it
Inventor
James B Black
Original Assignee
Gte Communication Syst
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 Gte Communication Syst filed Critical Gte Communication Syst
Publication of IT8622726A0 publication Critical patent/IT8622726A0/it
Application granted granted Critical
Publication of IT1214581B publication Critical patent/IT1214581B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • 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
    • H04Q11/06—Time-space-time switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Communication Control (AREA)
  • Exchange Systems With Centralized Control (AREA)
IT8622726A 1985-12-24 1986-12-17 Circuito d'interfaccia per trasmettere codici in chiave a un sistema di comunicazione telefonica centrex.! IT1214581B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/813,188 US4706278A (en) 1985-12-24 1985-12-24 Interface circuit for transmitting keycodes to a CENTREX

Publications (2)

Publication Number Publication Date
IT8622726A0 true IT8622726A0 (it) 1986-12-17
IT1214581B IT1214581B (it) 1990-01-18

Family

ID=25211706

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8622726A IT1214581B (it) 1985-12-24 1986-12-17 Circuito d'interfaccia per trasmettere codici in chiave a un sistema di comunicazione telefonica centrex.!

Country Status (4)

Country Link
US (1) US4706278A (it)
BE (1) BE905942A (it)
CA (1) CA1256184A (it)
IT (1) IT1214581B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4882746A (en) * 1987-03-22 1989-11-21 Masatoshi Shimada Cordless telephone system
US5712173A (en) * 1996-01-24 1998-01-27 Advanced Micro Devices, Inc. Method of making semiconductor device with self-aligned insulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254304A (en) * 1977-09-26 1981-03-03 E-Systems, Inc. Signal processor for use with a telephone system and a digital transmission line

Also Published As

Publication number Publication date
IT1214581B (it) 1990-01-18
BE905942A (fr) 1987-04-16
CA1256184A (en) 1989-06-20
US4706278A (en) 1987-11-10

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