CH454967A - Dial-up method for keypad code characters which are formed from a direct current key character and a speech-safe audio-frequency signal frequency combination, and device for carrying out the method - Google Patents

Dial-up method for keypad code characters which are formed from a direct current key character and a speech-safe audio-frequency signal frequency combination, and device for carrying out the method

Info

Publication number
CH454967A
CH454967A CH1715665A CH1715665A CH454967A CH 454967 A CH454967 A CH 454967A CH 1715665 A CH1715665 A CH 1715665A CH 1715665 A CH1715665 A CH 1715665A CH 454967 A CH454967 A CH 454967A
Authority
CH
Switzerland
Prior art keywords
dial
speech
carrying
direct current
current key
Prior art date
Application number
CH1715665A
Other languages
German (de)
Inventor
Baade Otto
Gasser Lorenz
Original Assignee
Int Standard Electric 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
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH454967A publication Critical patent/CH454967A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
CH1715665A 1964-12-15 1965-12-13 Dial-up method for keypad code characters which are formed from a direct current key character and a speech-safe audio-frequency signal frequency combination, and device for carrying out the method CH454967A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEST23082A DE1232213B (en) 1964-12-15 1964-12-15 Tone-frequency tactile dialing method for telecommunications, in particular telephone systems
DEST23083A DE1232214B (en) 1964-12-15 1964-12-15 Tone-frequency tactile dialing method for telecommunications, in particular telephone systems
DE1232213 1964-12-15
DEST23097A DE1236026B (en) 1964-12-15 1964-12-17 Dial-up device for touch-dial code characters, which are formed from a direct current preparation character and a speech-safe audio-frequency character frequency combination
DEST23111A DE1232215B (en) 1964-12-15 1964-12-19 Tone-frequency touch dialing method in telecommunications, in particular telephone systems

Publications (1)

Publication Number Publication Date
CH454967A true CH454967A (en) 1968-04-30

Family

ID=27509827

Family Applications (5)

Application Number Title Priority Date Filing Date
CH1702565A CH444239A (en) 1964-12-15 1965-12-09 Tone-frequency touch dialing method
CH1702665A CH437439A (en) 1964-12-15 1965-12-09 Tone-frequency touch dialing method
CH1715765A CH444240A (en) 1964-12-15 1965-12-13 Tone-frequency touch dialing method
CH1715665A CH454967A (en) 1964-12-15 1965-12-13 Dial-up method for keypad code characters which are formed from a direct current key character and a speech-safe audio-frequency signal frequency combination, and device for carrying out the method
CH797566A CH454067A (en) 1964-12-15 1966-06-02 Method for reducing the cross-section of a plurality of elements and their product

Family Applications Before (3)

Application Number Title Priority Date Filing Date
CH1702565A CH444239A (en) 1964-12-15 1965-12-09 Tone-frequency touch dialing method
CH1702665A CH437439A (en) 1964-12-15 1965-12-09 Tone-frequency touch dialing method
CH1715765A CH444240A (en) 1964-12-15 1965-12-13 Tone-frequency touch dialing method

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH797566A CH454067A (en) 1964-12-15 1966-06-02 Method for reducing the cross-section of a plurality of elements and their product

Country Status (8)

Country Link
US (1) US3482051A (en)
AT (1) AT277329B (en)
BE (4) BE673760A (en)
CH (5) CH444239A (en)
DE (4) DE1232214B (en)
FR (1) FR1459635A (en)
NL (4) NL6516301A (en)
SE (1) SE331301B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911223A (en) * 1971-12-02 1975-10-07 Siemens Ag Circuit arrangement for subscriber stations in telecommunications installations, especially telephone installations with auxiliary data traffic

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332912A (en) * 1942-05-01 1943-10-26 Bell Telephone Labor Inc Telephone system
FR81782E (en) * 1961-06-19 1964-01-31
US3319011A (en) * 1964-05-11 1967-05-09 Bell Telephone Labor Inc Multifrequency signal receiver circuit

Also Published As

Publication number Publication date
CH437439A (en) 1967-06-15
BE673759A (en) 1966-06-15
DE1232213B (en) 1967-01-12
FR1459635A (en) 1966-11-18
CH454067A (en) 1968-04-15
US3482051A (en) 1969-12-02
DE1236026B (en) 1967-03-09
NL6516307A (en) 1966-06-20
BE673897A (en) 1966-06-17
AT277329B (en) 1969-12-29
CH444239A (en) 1967-09-30
NL6516300A (en) 1966-06-16
NL6516301A (en) 1966-06-16
NL6516306A (en) 1966-06-20
DE1232214B (en) 1967-01-12
SE331301B (en) 1970-12-21
DE1232215B (en) 1967-01-12
CH444240A (en) 1967-09-30
BE673760A (en) 1966-06-15
BE673896A (en) 1966-06-17

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