WO2001022742A2 - Telephone communication system based on dual-tone multi-frequency signaling - Google Patents
Telephone communication system based on dual-tone multi-frequency signaling Download PDFInfo
- Publication number
- WO2001022742A2 WO2001022742A2 PCT/DE2000/003234 DE0003234W WO0122742A2 WO 2001022742 A2 WO2001022742 A2 WO 2001022742A2 DE 0003234 W DE0003234 W DE 0003234W WO 0122742 A2 WO0122742 A2 WO 0122742A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency
- arrangement
- arrangement according
- memory
- tone generator
- Prior art date
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
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
- H04M1/2725—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial using electronic memories
-
- 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
Definitions
- the invention relates to an arrangement for telephone communication according to the multi-frequency dialing method with an operating voltage source, a clock generator, and a tone generator, consisting of a frequency oscillator and a loudspeaker, the frequency of the tone generator being controllable via a selection unit.
- the multi-frequency dialing method which is also known as tone dialing or dual-tone multi-frequency (DTMF) is used for the electronic dialing system of the public telephone network but also for computer-controlled switching equipment.
- Two tones are generated to encode a number or a letter.
- the number 1 is encoded by a tone with the frequency of 697 Hz and a second tone of 1209 Hz.
- These tones are output with a predetermined length, for example at least 50 ms, and with a predetermined pause between them, which can also be 50 ms, for example.
- the occurrence of these two tones is recognized as the correspondingly coded number or the correspondingly coded letters and processed as an input of numbers or letters.
- DTMF tones are also used for communication with computers, for example in telebanking, or with answering machines.
- An arrangement of the type mentioned at the outset is generally known, for example, from remote controls for answering machines.
- An operating voltage source a tone generator, consisting of a frequency oscillator and a loudspeaker, is arranged in a housing.
- the frequency oscillator is usually implemented digitally, so that a clock generator is also provided.
- the frequency of the tone generator can be controlled via a selection unit, generally via a keyboard.
- dialing processes can be triggered by means of the DTMF tones or communicated with correspondingly equipped technical facilities.
- a sound generation module which is used in so-called "sounding" greeting cards, is also generally known.
- This sound generator module is provided with an operating voltage source, a clock generator and a tone generator, consisting of a frequency oscillator and a loudspeaker.
- the loudspeaker is designed as a piezo loudspeaker, so that this sound generating module can be very small, in particular very flat, and can be used in a greeting card.
- the operating voltage source can be switched on and off externally.
- the switching function is realized with these greeting cards in that the card is designed as a folding card and a lever actuating the switch is articulated on the side of the folding card opposite the sound generating module. If the greeting card is now opened, the semiconductor chip which is arranged in the sound generating module and contains the essential circuit parts is supplied with operating voltage. This runs a program that acts as a selection unit and controls the frequency of the tone generator. This sound generating module is very inexpensive to manufacture and can therefore be used as a mass article.
- the invention has for its object to provide an arrangement for telephone communication, in which a manual number or letter input for triggering dialing functions can be omitted and which is inexpensive to manufacture.
- the selection unit consists of a control circuit which controls the tone generator and a storage unit which is operatively connected to the control circuit and in which at least one frequency information for the multi-frequency dialing method is stored or can be stored, which corresponds to the individual digits of a telephone number.
- the digit-encoding DTMF tones can be output one after the other via the loudspeaker as soon as a start is given for outputting these tones.
- This start can take place, for example, when the operating voltage is connected to the arrangement. In this case, a telephone number would then be able to be dialed automatically without the need to enter a key.
- the memory unit It is possible to divide the memory unit into a number memory and a memory for storing the frequency information required for the DTMF tones.
- the telephone number is stored in bytes in the number memory.
- the one corresponding to the byte DTMF frequency information is read out and sent to the tone generator.
- the storage effort can thus be reduced since only one byte has to be stored for each digit and not the complete frequency information corresponding to the digit.
- the loudspeaker is connected to a housing as a resonance body, at least partially surrounding the arrangement.
- the housing Since the housing resonates in resonance, the volume of the tones emitted via the loudspeaker increases, which improves the functional reliability or, if sufficient functional reliability is guaranteed, the loudspeakers can be made correspondingly small.
- the storage device consists of a non-volatile storage area with a stored part of the telephone number and a volatile storage area with a storable part of the telephone number.
- Parts of a telephone number for example a specific area code or the area code of a specific network operator, can be permanently stored in the non-volatile memory area. Numbers can optionally be stored in the volatile memory area. This can be done either by the operator himself or by the publisher of the arrangement.
- the tone and / or clock generator is provided with a frequency and / or amplitude stabilization circuit which is guided by a digital voltage detection of the operating voltage.
- a sound generating module in the manner of a sound generating module known from greeting cards is supplemented with the storage unit and used in this supplement.
- Such sound generating modules can be produced very inexpensively.
- a memory unit in which the DTMF frequency information is stored such a sound generation module can be used to implement an automatic dialing of a predefined telephone number.
- An arrangement according to the invention can thus be used in a new and very inexpensive manner for advertising purposes.
- Fig. 1 is a block diagram of an arrangement according to the invention and Fig. 2 is a schematic representation of the handling of an arrangement according to the invention.
- a loudspeaker 3 is connected to the housing 4 of the assembly, which thus acts as a resonance body.
- the assembly is designed as a chip 5, which can be provided with an advertising label.
- a receiving opening 6 is provided on one side, by means of which the chip 5 can be attached to a keychain or the like. attached or stored on a ring together with other chips 5.
- the arrangement comprises a clock generator 7 and a tone generator 8, consisting of eight frequency oscillators 9, an amplifier 10 and the loudspeaker 3.
- the frequency of the tone generator 8 can be selected via the control of one frequency oscillator 9 each.
- a processor 11 is used as the control unit, which in each case controls the corresponding frequency oscillators 9 by means of a program stored in a program memory 12 and by means of the number and DTMF information stored in a memory unit 13. Output tones.
- the memory unit is divided into program memory 12, a number memory 14 and a DTMF memory 15 for storing the frequency information required for the DTMF tones, the number memory 14 in turn comprising a non-volatile memory area 16 in the form of a ROM memory and a volatile one Memory area 17 in the form of an EEPROM memory.
- the manufacturer of the chip 5 stores part of the telephone number, for example a landline code, in the non-volatile memory area 16. The buyer then stores, for example, his own telephone number in the volatile memory area 17. If the chip 5 is then distributed as a giveaway, the recipient of the giveaway can then automatically select the buyer via the programmed landline.
- the telephone number to be dialed is stored in bytes in the number memory 14.
- the processor reads the DTMF frequency information corresponding to the byte.
- the corresponding frequency oscillators 9 are thus driven and sent to the tone generator 8.
- the practical use of advertising is such that a company that intends to advertise via the arrangement according to the invention stores its own telephone number in the number memory 14 and provides the chip 5 with its own advertising imprint. Thereafter, the chip 5 is given away in large numbers as advertising material.
- a company that intends to advertise via the arrangement according to the invention stores its own telephone number in the number memory 14 and provides the chip 5 with its own advertising imprint. Thereafter, the chip 5 is given away in large numbers as advertising material.
- anyone who receives such a chip 5 can put the arrangement into operation by switching on the operating voltage source 1 by means of the push-button switch 2 which can be actuated from the outside.
- the program is loaded into the processor 11 from the program memory 12.
- the processor 11 queries the number memory 14 byte by byte for the number to be dialed. Furthermore, it queries the DTMF memory 15 as to which byte it should drive which frequency oscillator 9. Accordingly, the control and the output of a DTMF tone sequence on the loudspeaker 3 take place via the tone generator 8.
- the operator holds the loudspeaker 3 against the mouthpiece 18 of a telephone and is then connected to the advertising company. If such chips 5 are issued by many, you can create your own telephone directory from many such chips 5.
- chips 5 can of course also be issued in the form of business cards, so that the creation of a personal address directory with automated telephone dialing of the addressees is possible.
- Operating voltage source key switch speaker housing chip receiving opening clock generator tone generator frequency oscillator amplifier processor program memory memory unit number memory DTMF memory non-volatile memory area volatile memory area speech cup
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Telephone Set Structure (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00978939A EP1214847A2 (en) | 1999-09-23 | 2000-09-18 | Telephone communication system based on dual-tone multi-frequency signaling |
AU16452/01A AU1645201A (en) | 1999-09-23 | 2000-09-18 | Telephone communication system based on dual-tone multi-frequency signaling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19945519.8 | 1999-09-23 | ||
DE1999145519 DE19945519A1 (en) | 1999-09-23 | 1999-09-23 | Arrangement for telephone communication using the multi-frequency dialing method |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001022742A2 true WO2001022742A2 (en) | 2001-03-29 |
WO2001022742A3 WO2001022742A3 (en) | 2001-10-11 |
Family
ID=7922967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/003234 WO2001022742A2 (en) | 1999-09-23 | 2000-09-18 | Telephone communication system based on dual-tone multi-frequency signaling |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1214847A2 (en) |
AU (1) | AU1645201A (en) |
DE (1) | DE19945519A1 (en) |
WO (1) | WO2001022742A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8289933B2 (en) | 2001-10-18 | 2012-10-16 | Alcatel Lucent | Hybrid transmission method for wireless communications |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3464467B1 (en) | 2016-06-06 | 2020-03-18 | INEOS Styrolution Group GmbH | Process for producing a stabilizer dispersion and process for producing a thermoplastic composition stabilized with the stabilizer dispersion |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0318454A2 (en) * | 1987-11-24 | 1989-05-31 | U.S. News Limited Partnership | Mass-distributed, preprogrammed automatic dialing mechanism and related processes |
US4995077A (en) * | 1989-10-30 | 1991-02-19 | Malinowski Igor P | Card-like device having a microprocessor and speaker for communicating with a telephone line |
US5181744A (en) * | 1991-03-15 | 1993-01-26 | Betheil Stephen M | Promotional auto dialer card |
EP0664633A1 (en) * | 1994-01-25 | 1995-07-26 | Gemplus Card International | Device for generating acoustic signals and transmitting the same on a telephone line |
-
1999
- 1999-09-23 DE DE1999145519 patent/DE19945519A1/en not_active Withdrawn
-
2000
- 2000-09-18 WO PCT/DE2000/003234 patent/WO2001022742A2/en not_active Application Discontinuation
- 2000-09-18 AU AU16452/01A patent/AU1645201A/en not_active Abandoned
- 2000-09-18 EP EP00978939A patent/EP1214847A2/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0318454A2 (en) * | 1987-11-24 | 1989-05-31 | U.S. News Limited Partnership | Mass-distributed, preprogrammed automatic dialing mechanism and related processes |
US4995077A (en) * | 1989-10-30 | 1991-02-19 | Malinowski Igor P | Card-like device having a microprocessor and speaker for communicating with a telephone line |
US5181744A (en) * | 1991-03-15 | 1993-01-26 | Betheil Stephen M | Promotional auto dialer card |
EP0664633A1 (en) * | 1994-01-25 | 1995-07-26 | Gemplus Card International | Device for generating acoustic signals and transmitting the same on a telephone line |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8289933B2 (en) | 2001-10-18 | 2012-10-16 | Alcatel Lucent | Hybrid transmission method for wireless communications |
Also Published As
Publication number | Publication date |
---|---|
DE19945519A1 (en) | 2001-03-29 |
AU1645201A (en) | 2001-04-24 |
WO2001022742A3 (en) | 2001-10-11 |
EP1214847A2 (en) | 2002-06-19 |
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