IT1112398B - Apparecchio e procedimento per far funzionare un impianto di trasmissione di codice a piu' frequenze foniche per l'inizio di chiamate telefoniche - Google Patents

Apparecchio e procedimento per far funzionare un impianto di trasmissione di codice a piu' frequenze foniche per l'inizio di chiamate telefoniche

Info

Publication number
IT1112398B
IT1112398B IT21202/79A IT2120279A IT1112398B IT 1112398 B IT1112398 B IT 1112398B IT 21202/79 A IT21202/79 A IT 21202/79A IT 2120279 A IT2120279 A IT 2120279A IT 1112398 B IT1112398 B IT 1112398B
Authority
IT
Italy
Prior art keywords
procedure
operate
transmission system
telephone calls
code transmission
Prior art date
Application number
IT21202/79A
Other languages
English (en)
Other versions
IT7921202A0 (it
Original Assignee
Gte Automatic Electric Lab Inc
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 Automatic Electric Lab Inc filed Critical Gte Automatic Electric Lab Inc
Publication of IT7921202A0 publication Critical patent/IT7921202A0/it
Application granted granted Critical
Publication of IT1112398B publication Critical patent/IT1112398B/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
    • 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
    • H04M1/505—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 signals generated in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
IT21202/79A 1978-03-30 1979-03-22 Apparecchio e procedimento per far funzionare un impianto di trasmissione di codice a piu' frequenze foniche per l'inizio di chiamate telefoniche IT1112398B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/891,883 US4156115A (en) 1978-03-30 1978-03-30 Apparatus and method for a multiple tone code sender system for automatic call initiation

Publications (2)

Publication Number Publication Date
IT7921202A0 IT7921202A0 (it) 1979-03-22
IT1112398B true IT1112398B (it) 1986-01-13

Family

ID=25398988

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21202/79A IT1112398B (it) 1978-03-30 1979-03-22 Apparecchio e procedimento per far funzionare un impianto di trasmissione di codice a piu' frequenze foniche per l'inizio di chiamate telefoniche

Country Status (4)

Country Link
US (1) US4156115A (it)
BE (1) BE872074A (it)
CA (1) CA1107420A (it)
IT (1) IT1112398B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336529A (en) * 1980-02-19 1982-06-22 Pitney Bowes Inc. Postage meter having shielded keyboard to protect against electromagnetic radiation
JPH01311745A (ja) * 1988-06-10 1989-12-15 Fujitsu Ltd ダイヤル信号送出装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719897A (en) * 1971-11-26 1973-03-06 Gte Automatic Electric Lab Inc Digital tone generator

Also Published As

Publication number Publication date
US4156115A (en) 1979-05-22
BE872074A (fr) 1979-03-16
CA1107420A (en) 1981-08-18
IT7921202A0 (it) 1979-03-22

Similar Documents

Publication Publication Date Title
GB2032153B (en) Telephone reservation-processing system
GB2014798A (en) Telephone network/subscriber interface device
JPS5549063A (en) Telephone set connecting block
JPS5514695A (en) Telephone cable
JPS5542494A (en) Telephone set
GB2014825B (en) Telephone subscriber apparatus
GB1540553A (en) Subscriber's telephone line equipment
ZA79633B (en) Telephone subscriber apparatus
GB2013069B (en) Telephone answering device
GB2014823B (en) Telephone handset
IT1112398B (it) Apparecchio e procedimento per far funzionare un impianto di trasmissione di codice a piu' frequenze foniche per l'inizio di chiamate telefoniche
JPS5583366A (en) Telephone set
GB1538017A (en) Subscriber's telephone line equipment
GB2016876B (en) Telephone transmission apparatus
GB2023966B (en) Telephone subscriber's apparatus
GB2020948B (en) Telephone answering machines
IT1131125B (it) Dispositivo di appliazione di segnali di attesa di chiamata telefonica
GB2023374B (en) Telephone set
JPS54148310A (en) Telephone set
CA43804S (en) Telephone handset
IT1095809B (it) Dispositivo mobile per l'utilizzazione a distanza di apparecchiature telefoniche
KR780001620Y1 (en) Tone ringer for telephone
JPS55102962A (en) Telephone dial system
IE44788L (en) Telephone subscriber connection device
GB1557547A (en) Telephone call transfer device