GB2373133B - Apparatus for transmitting tone signals - Google Patents

Apparatus for transmitting tone signals

Info

Publication number
GB2373133B
GB2373133B GB0207489A GB0207489A GB2373133B GB 2373133 B GB2373133 B GB 2373133B GB 0207489 A GB0207489 A GB 0207489A GB 0207489 A GB0207489 A GB 0207489A GB 2373133 B GB2373133 B GB 2373133B
Authority
GB
United Kingdom
Prior art keywords
tone signals
transmitting tone
transmitting
signals
tone
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 - Fee Related
Application number
GB0207489A
Other versions
GB2373133A (en
GB0207489D0 (en
Inventor
Eiji Otsuka
Takeshi Yamashita
Yoshiko Hase
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.)
Toshiba Corp
Original Assignee
Toshiba 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 JP2000354330A external-priority patent/JP2001218238A/en
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of GB0207489D0 publication Critical patent/GB0207489D0/en
Publication of GB2373133A publication Critical patent/GB2373133A/en
Application granted granted Critical
Publication of GB2373133B publication Critical patent/GB2373133B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
    • 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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB0207489A 1999-11-24 2000-11-23 Apparatus for transmitting tone signals Expired - Fee Related GB2373133B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP33337199 1999-11-24
JP2000354330A JP2001218238A (en) 1999-11-24 2000-11-21 Tone signal receiver, tone signal transmitter and tone signal transmitter receiver
GB0028568A GB2362780B (en) 1999-11-24 2000-11-23 Apparatus for receiving tone signal and apparatus for transmitting or receiving or receiving tone signal

Publications (3)

Publication Number Publication Date
GB0207489D0 GB0207489D0 (en) 2002-05-08
GB2373133A GB2373133A (en) 2002-09-11
GB2373133B true GB2373133B (en) 2003-03-19

Family

ID=27255983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0207489A Expired - Fee Related GB2373133B (en) 1999-11-24 2000-11-23 Apparatus for transmitting tone signals

Country Status (1)

Country Link
GB (1) GB2373133B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058805A (en) * 1975-06-16 1977-11-15 Comdial Corporation Digital multitone generator for telephone dialing
EP0349162A2 (en) * 1988-06-27 1990-01-03 Advanced Micro Devices, Inc. Methods of generating waveforms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058805A (en) * 1975-06-16 1977-11-15 Comdial Corporation Digital multitone generator for telephone dialing
EP0349162A2 (en) * 1988-06-27 1990-01-03 Advanced Micro Devices, Inc. Methods of generating waveforms

Also Published As

Publication number Publication date
GB2373133A (en) 2002-09-11
GB0207489D0 (en) 2002-05-08

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Legal Events

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

Effective date: 20091123