WO2002067556A1 - Automatic dialing device for telephones - Google Patents

Automatic dialing device for telephones Download PDF

Info

Publication number
WO2002067556A1
WO2002067556A1 PCT/KR2002/000228 KR0200228W WO02067556A1 WO 2002067556 A1 WO2002067556 A1 WO 2002067556A1 KR 0200228 W KR0200228 W KR 0200228W WO 02067556 A1 WO02067556 A1 WO 02067556A1
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
automatic dialing
dialing device
dtmf
storage
Prior art date
Application number
PCT/KR2002/000228
Other languages
French (fr)
Inventor
Hyoun-Gyu Kim
Original Assignee
Hyoun-Gyu Kim
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 Hyoun-Gyu Kim filed Critical Hyoun-Gyu Kim
Publication of WO2002067556A1 publication Critical patent/WO2002067556A1/en

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
    • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/2745—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
    • H04M1/275—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips implemented by means of portable electronic directories
    • 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
    • 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

Definitions

  • the present invention relates generally to an automatic dialing device for telephones, which is used when positioned on or near the body of a telephone, and more particularly to an automatic dialing device for telephones, which can easily dial one or more specific telephone numbers by a one-touch operation using a button.
  • One of advertising methods is to distribute a variety of commodities for sales promotion. Most of conventional advertising methods using commodities for sales promotion are achieved by printing telephone numbers of publicizing companies on commodities for sales promotion to be publicized. However, if the commodities are used for a long time, the printing may be worn off, so the commodities are unable to function as sales promotion items.
  • an object of the present invention is to provide an automatic dialing device for telephones, which is convenient to install, does not require an additional power supply, and prevents operating errors in dialing.
  • the present invention provides an automatic dialing device installed as a separate body from a telephone, comprising a manipulation button for allowing a user to manipulate the device; a Dual Tone Multi Frequency (DTMF) storage and output unit for storing at least one specific telephone number and outputting a DTMF signal of a stored telephone number according to manipulation of the manipulation button; first and second connectors for transmitting the output DTMF signal and connecting with a trunk line and a telephone, respectively; and an interfacing unit for interfacing the DTMF storage and output unit with the trunk line and the telephone so that the DTMF signal is used only while the handset of the telephone is picked up to turn a hook switch of the telephone off.
  • DTMF Dual Tone Multi Frequency
  • Fig. 1 is a perspective view showing the installation of an automatic dialing device for telephones according to the present invention
  • Fig. 2 is a circuit diagram of the automatic dialing device connected to a telephone according to the present invention.
  • Fig. 3 is a cross sectional view showing the installation of the automatic dialing device according to the present invention.
  • calling circuit unit 610 DTMF storage and output
  • interfacing unit 630 constant voltage unit 660: first connector 670: second connector 10: manipulation button DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Fig. 1 is a perspective view showing the installation of an automatic dialing device for telephones according to the present invention
  • Fig. 2 is a circuit diagram of the automatic dialing device connected to a telephone according to the present invention
  • Fig. 3 is a cross sectional view showing the installation of the automatic dialing device of this invention.
  • an automatic dialing device 6 of the present invention is installed as a separate body from a telephone 2.
  • an adhesion surface is formed on the bottom of a casing 6, and a manipulation button 10 is arranged for user manipulation on the top of the casing 60.
  • the automatic dialing device 6 of the present invention comprises a Dual Tone Multi Frequency
  • DTMF DTMF storage and output unit 610
  • first and second connectors 660 and 670 first and second connectors 660 and 670
  • an interfacing unit 620 The
  • DTMF storage and output unit 610 stores specific telephone numbers and outputs DTMF signals of stored telephone numbers according to manipulation of the manipulation button 10.
  • the first and second connectors 660 and 670 transmit the output DTMF signals, and are connected to a trunk line 4 and the telephone 2, respectively.
  • the interfacing unit 620 interfaces the DTMF storage and output unit 610 with the trunk line 4 and the telephone 2 so that the DTMF signals are used only while the handset of the telephone is picked up, that is, the telephone 2 is off hook. In this case, one or more telephone numbers can be designated or stored.
  • the DTMF storage and output unit 610 is constructed using a read only memory (ROM) in which prestored DTMF signals are not erased. Alternatively, the DTMF storage and output unit 610 can be constructed using a flash memory in which DTMF signals can be randomly restored during the use of the automatic dialing device 6. If the randomly restorable flash memory is used as the DTMF storage and output unit 610, it can be constructed such that a user is prevented from randomly restoring DTMF signals in the DTMF storage and output unit 610 by removing a storage button.
  • ROM read only memory
  • the DTMF storage and output unit 610 can be constructed using a flash memory in which DTMF signals can be randomly restored during the use of the automatic dialing device 6. If the randomly restorable flash memory is used as the DTMF storage and output unit 610, it can be constructed such that a user is prevented from randomly restoring DTMF signals in the DTMF storage and output unit 610 by removing a storage button.
  • the manipulation button 10 is realized as a typical contact switch or a touch switch.
  • the interfacing unit 620 constitutes a closed circuit together with the calling circuit unit 220 of the telephone 2 through the first and second connectors 660 and 670 when the handset 202 of the telephone 2 is picked up, that is, the hook switch 210 is turned off, thus allowing DTMF signals outputted from the DTMF storage and output unit 610 to be transmitted to the trunk line 4 through the calling circuit unit 220 of the telephone 2.
  • the interfacing unit 620 is comprised of a transformer 622 for impedance matching and a tone signal switch 621.
  • the tone signal switch 621 is turned on for a predetermined period of time on the basis of a control signal Sc provided by charge stored in a capacitor C as power is supplied after the manipulation button 10 is pressed and turned on.
  • a typical analog switch integrated device can be used as the tone signal switch 621.
  • Input and output terminals of the tone signal switch 621 are disposed between a signal ground and a primary coil TI of the impedance matching transformer 622. Accordingly, the flow of the signal outputted from the DTMF storage and output unit 610 can be controlled.
  • both ends of a secondary coil T2 of the impedance matching transformer 622 constitute a closed circuit together with the calling circuit unit 220 of the telephone 2 with respect to the trunk line 4 when the hook switch 210 of the telephone 2 is turned off.
  • the interfacing unit 620 constitutes a closed circuit together with calling circuit unit 220, so DTMF signals outputted from the DTMF storage and output unit 610 can be transmitted to the trunk line 4. These operations are described in detail with reference to Fig. 2.
  • a DTMF signal outputted from the DTMF storage and output unit 610 is applied to the primary coil TI of the impedance matching transformer 622.
  • the DTMF signal is induced in the secondary coil T2 , so a first tone signal of the DTMF signal is applied to a first terminal 661 of the first connector 660, and a second tone signal thereof is applied to the first terminal 671 of the second connector 670.
  • the second tone signal of the DTMF signal which is applied to the first terminal 671 of the second connector 670, is transmitted to the calling circuit unit 220 of the telephone 2 through a first signal line 501 of the telephone cable connected to the plug 52. Then, the transmitted tone signal of the DTMF signal flows to the second terminal 662 of the first connector 660, which is connected to the second terminal 672 of the second connector 670, through the second signal line 502 of the telephone cable via a switching device TR which is turned on as the hook switch 210 is turned off.
  • the second tone signal of the DTMF signal is transmitted to the trunk line 4 together with the first tone signal of the DTMF signal, which is outputted to the first terminal 661 of the first connector 660, thus allowing the DTMF signal stored in the DTMF storage and output unit 610 to be transmitted to the trunk line 4.
  • reference numeral 230 in the telephone 2 is a control circuit unit to turn on the switch device TR by turning off the hook switch 210.
  • the casing 60 of the automatic dialing device 6 of the present invention is adhered to a cover of the telephone 2 through a typical double-sided tape
  • the automatic dialing device 6 of the present invention has a constant voltage unit 630 to drop the voltage of power flowing through the trunk line 4 and provide the dropped voltage as a constant voltage for self-power supply.
  • a direct current (DC) voltage of approximately 45V is supplied to the trunk line 4 of telephone lines from a switchboard of a telephone office.
  • the constant voltage unit 630 drops the DC voltage of 45N to DC 12 or 5V, suitable to the circuit driving of the DTMF storage and output unit 610.
  • the automatic dialing device 6 of the present invention may include a typical battery to drive the DTMF storage and output unit 610 instead of the constant voltage unit 630, thus enabling the DTMF storage and output unit 610 to use the power of the battery.
  • the present invention provides an automatic dialing device for telephones, which it is only adhered to a telephone and then plugs of trunk and telephone lines are respectively inserted into first and second connectors, thus completing its installation, and does not require supply of additional power, so it can be simply installed. Further, the present invention is advantageous in that it is not affected by surrounding noise, different from a conventional automatic dialing device, such that operating errors occurring in dialing can be entirely eliminated. Therefore, the automatic dialing device of this invention can be sufficiently provided as a commodity for sales promotion, which is highly reliable in its operation and is beneficial to advertisers.

Abstract

Disclosed herein is an automatic dialing device for telephones, which is used when positioned on or near the body of a telephone. The automatic dialing device includes a manipulation button for allowing a user to manipulate the device, a Dual Tone Multi Frequency (DTMF) storage and output unit for storing telephone number(s) and outputting a stored DTMF signal according to manipulation of the manipulation button, first and second connectors for transmitting the output DTMF signal and connecting with a trunk line and a telephone, respectively, and an interfacing unit for interfacing the DTMF storage and output unit with the trunk line and the telephone so that the DTMF signal is used only while the handset of the telephone is picked up, that is, the hook switch of the telephone is turned off.

Description

AUTOMATIC DIALING DEVICE FOR TELEPHONES
Field of the Invention
The present invention relates generally to an automatic dialing device for telephones, which is used when positioned on or near the body of a telephone, and more particularly to an automatic dialing device for telephones, which can easily dial one or more specific telephone numbers by a one-touch operation using a button.
Description of the Prior Art
In present society, functions of various advertisements are important enough to influence the success or failure of a business. Accordingly, most enterprises tend to try to publicize them using various methods.
One of advertising methods is to distribute a variety of commodities for sales promotion. Most of conventional advertising methods using commodities for sales promotion are achieved by printing telephone numbers of publicizing companies on commodities for sales promotion to be publicized. However, if the commodities are used for a long time, the printing may be worn off, so the commodities are unable to function as sales promotion items.
In the prior art, there are several preceding patents relating to commodities for sales promotion which can automatically telephone a publicizing company using a one- touch automatic dialing method.
For example, there are automatic dialing telephone supporters to output dialing tones, which are disclosed in Korean Utility Model Appl . Nos . 97-8502 and 98-1055. Most automatic dialing commodities for sales promotion are each designed such that an output portion for outputting a dialing tone is positioned near a transmitting unit of a handset, such that the dialing tone is inputted to the transmitting unit to telephone a publicizing company. However, the automatic dialing commodities for sales promotion are problematic in that they cause errors in dialing due to factors such as surrounding noise, and they must be additionally supplied with operating power for their operations .
Meanwhile, in the prior art, there is a telephone additionally having a memory function to reduce button manipulation without repeatedly pressing frequently called numbers using buttons. However, in order to use such an additional convenient function, the user must undergo inconvenience to previously store telephone numbers in the telephone by pressing buttons. Further, since it is difficult for the user to remember addresses of memorized telephone numbers, the user makes an effort to find the addresses. If such a telephone having the memory function is used as such a commodity for sales promotion, it is undesirable in that it is too expensive to be used as the commodity for sales promotion, and the telephone number of a publicizing company can be deleted according to user's selection.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an automatic dialing device for telephones, which is convenient to install, does not require an additional power supply, and prevents operating errors in dialing.
In order to accomplish the above object, the present invention provides an automatic dialing device installed as a separate body from a telephone, comprising a manipulation button for allowing a user to manipulate the device; a Dual Tone Multi Frequency (DTMF) storage and output unit for storing at least one specific telephone number and outputting a DTMF signal of a stored telephone number according to manipulation of the manipulation button; first and second connectors for transmitting the output DTMF signal and connecting with a trunk line and a telephone, respectively; and an interfacing unit for interfacing the DTMF storage and output unit with the trunk line and the telephone so that the DTMF signal is used only while the handset of the telephone is picked up to turn a hook switch of the telephone off. BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view showing the installation of an automatic dialing device for telephones according to the present invention;
Fig. 2 is a circuit diagram of the automatic dialing device connected to a telephone according to the present invention; and
Fig. 3 is a cross sectional view showing the installation of the automatic dialing device according to the present invention.
* Description of numerals of main components in the drawings *
2: telephone 4: trunk line
6: automatic dialing device 8: double-sided tape
60: telephone casing 210: hook switch
220: calling circuit unit 610: DTMF storage and output
620: interfacing unit 630: constant voltage unit 660: first connector 670: second connector 10: manipulation button DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings .
Fig. 1 is a perspective view showing the installation of an automatic dialing device for telephones according to the present invention, Fig. 2 is a circuit diagram of the automatic dialing device connected to a telephone according to the present invention, and Fig. 3 is a cross sectional view showing the installation of the automatic dialing device of this invention.
As shown in Fig. 1, an automatic dialing device 6 of the present invention is installed as a separate body from a telephone 2. In the automatic dialing device 6, an adhesion surface is formed on the bottom of a casing 6, and a manipulation button 10 is arranged for user manipulation on the top of the casing 60.
The automatic dialing device 6 of the present invention, as shown in Fig. 2, comprises a Dual Tone Multi Frequency
(DTMF) storage and output unit 610, first and second connectors 660 and 670, and an interfacing unit 620. The
DTMF storage and output unit 610 stores specific telephone numbers and outputs DTMF signals of stored telephone numbers according to manipulation of the manipulation button 10.
The first and second connectors 660 and 670 transmit the output DTMF signals, and are connected to a trunk line 4 and the telephone 2, respectively. The interfacing unit 620 interfaces the DTMF storage and output unit 610 with the trunk line 4 and the telephone 2 so that the DTMF signals are used only while the handset of the telephone is picked up, that is, the telephone 2 is off hook. In this case, one or more telephone numbers can be designated or stored.
The DTMF storage and output unit 610 is constructed using a read only memory (ROM) in which prestored DTMF signals are not erased. Alternatively, the DTMF storage and output unit 610 can be constructed using a flash memory in which DTMF signals can be randomly restored during the use of the automatic dialing device 6. If the randomly restorable flash memory is used as the DTMF storage and output unit 610, it can be constructed such that a user is prevented from randomly restoring DTMF signals in the DTMF storage and output unit 610 by removing a storage button.
The manipulation button 10 is realized as a typical contact switch or a touch switch. The interfacing unit 620 constitutes a closed circuit together with the calling circuit unit 220 of the telephone 2 through the first and second connectors 660 and 670 when the handset 202 of the telephone 2 is picked up, that is, the hook switch 210 is turned off, thus allowing DTMF signals outputted from the DTMF storage and output unit 610 to be transmitted to the trunk line 4 through the calling circuit unit 220 of the telephone 2.
As described above, the components of parts constituting the closed circuit are described in detail.
The interfacing unit 620 is comprised of a transformer 622 for impedance matching and a tone signal switch 621.
The tone signal switch 621 is turned on for a predetermined period of time on the basis of a control signal Sc provided by charge stored in a capacitor C as power is supplied after the manipulation button 10 is pressed and turned on. A typical analog switch integrated device can be used as the tone signal switch 621.
Input and output terminals of the tone signal switch 621 are disposed between a signal ground and a primary coil TI of the impedance matching transformer 622. Accordingly, the flow of the signal outputted from the DTMF storage and output unit 610 can be controlled.
Further, through the first and second connectors 660 and 670, both ends of a secondary coil T2 of the impedance matching transformer 622 constitute a closed circuit together with the calling circuit unit 220 of the telephone 2 with respect to the trunk line 4 when the hook switch 210 of the telephone 2 is turned off.
As described above, the interfacing unit 620 constitutes a closed circuit together with calling circuit unit 220, so DTMF signals outputted from the DTMF storage and output unit 610 can be transmitted to the trunk line 4. These operations are described in detail with reference to Fig. 2. When the tone signal switch 621 is turned on, a DTMF signal outputted from the DTMF storage and output unit 610 is applied to the primary coil TI of the impedance matching transformer 622. Then, the DTMF signal is induced in the secondary coil T2 , so a first tone signal of the DTMF signal is applied to a first terminal 661 of the first connector 660, and a second tone signal thereof is applied to the first terminal 671 of the second connector 670. The second tone signal of the DTMF signal, which is applied to the first terminal 671 of the second connector 670, is transmitted to the calling circuit unit 220 of the telephone 2 through a first signal line 501 of the telephone cable connected to the plug 52. Then, the transmitted tone signal of the DTMF signal flows to the second terminal 662 of the first connector 660, which is connected to the second terminal 672 of the second connector 670, through the second signal line 502 of the telephone cable via a switching device TR which is turned on as the hook switch 210 is turned off. Therefore, the second tone signal of the DTMF signal is transmitted to the trunk line 4 together with the first tone signal of the DTMF signal, which is outputted to the first terminal 661 of the first connector 660, thus allowing the DTMF signal stored in the DTMF storage and output unit 610 to be transmitted to the trunk line 4. In Fig. 2, reference numeral 230 in the telephone 2 is a control circuit unit to turn on the switch device TR by turning off the hook switch 210.
On the other hand, the casing 60 of the automatic dialing device 6 of the present invention is adhered to a cover of the telephone 2 through a typical double-sided tape
8, such that the automatic dialing device 6 is used, as shown in Fig. 3.
If a predetermined region of the surface of the manipulation button 10, which is exposed to the outside, is covered with luminous material such as a luminous paint or a fluorescent paint, the visibility of the manipulation button 10 can be improved even at night. A logo of the publicizing company can be printed on the surface of the manipulation button 10 using the luminous material. Further, if the manipulation button 10 is a touch switch, the logo of a publicizing company can be used as two contact points of the touch switch instead of luminous material, thus allowing a manipulation signal to be generated by the current flow of a finger . The automatic dialing device 6 of the present invention has a constant voltage unit 630 to drop the voltage of power flowing through the trunk line 4 and provide the dropped voltage as a constant voltage for self-power supply. Generally, a direct current (DC) voltage of approximately 45V is supplied to the trunk line 4 of telephone lines from a switchboard of a telephone office. In this case, the constant voltage unit 630 drops the DC voltage of 45N to DC 12 or 5V, suitable to the circuit driving of the DTMF storage and output unit 610.
Further, the automatic dialing device 6 of the present invention may include a typical battery to drive the DTMF storage and output unit 610 instead of the constant voltage unit 630, thus enabling the DTMF storage and output unit 610 to use the power of the battery.
As described above, the present invention provides an automatic dialing device for telephones, which it is only adhered to a telephone and then plugs of trunk and telephone lines are respectively inserted into first and second connectors, thus completing its installation, and does not require supply of additional power, so it can be simply installed. Further, the present invention is advantageous in that it is not affected by surrounding noise, different from a conventional automatic dialing device, such that operating errors occurring in dialing can be entirely eliminated. Therefore, the automatic dialing device of this invention can be sufficiently provided as a commodity for sales promotion, which is highly reliable in its operation and is beneficial to advertisers.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

WHAT IS CLAIMED IS:
1. An automatic dialing device installed as a separate body from a telephone, comprising: a manipulation button for allowing a user to manipulate the device; a Dual Tone Multi Frequency (DTMF) storage and output unit for storing at least one specific telephone number and outputting a DTMF signal of a stored telephone number according to manipulation of the manipulation button; first and second connectors for transmitting the output DTMF signal and connecting with a trunk line and a telephone, respectively; and an interfacing unit for interfacing the DTMF storage and output unit with the trunk line and the telephone so that the DTMF signal is used only while the handset of the telephone is picked up to turn a hook switch of the telephone off.
2. The automatic dialing device according to claim 1, wherein the interfacing unit constitutes a closed circuit together with a calling circuit of the telephone through the first and second connectors when the telephone is off hook, such that the DTMF signal outputted from the DTMF storage and output unit is transmitted to the trunk line through the calling circuit.
3. The automatic dialing device according to claim 1, wherein the automatic dialing device is designed such that a casing of the automatic dialing device is adhered to the telephone through a double-sided tape.
4. The automatic dialing device according to claim 1, wherein the DTMF storage and output unit is realized as a read only memory (ROM) in which a prestored DTMF signal is not erased.
5. The automatic dialing device according to claim 1, wherein the DTMF storage and output unit is realized as a flash memory such that a DTMF signal of a new telephone number is randomly stored and used.
6. The automatic dialing device according to claim 1, wherein the manipulation button is realized as a contact switch or touch switch.
7. The automatic dialing device according to claim 1, wherein the manipulation button has a predetermined region of its surface exposed to the outside, the region being covered with luminous material .
8. The automatic dialing device according to claim 1, further comprising a constant voltage unit for dropping a voltage of power flowing through the trunk line and supplying the dropped voltage as a constant voltage for self-power supply.
9. The automatic dialing device according to claim 1, further comprising a battery such that the automatic dialing device uses power from the battery.
PCT/KR2002/000228 2001-02-20 2002-02-14 Automatic dialing device for telephones WO2002067556A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KRUM2001-0004276 2001-02-20
KR2020010004276U KR200230948Y1 (en) 2001-02-20 2001-02-20 A one touch type automatic dialler

Publications (1)

Publication Number Publication Date
WO2002067556A1 true WO2002067556A1 (en) 2002-08-29

Family

ID=27751715

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2002/000228 WO2002067556A1 (en) 2001-02-20 2002-02-14 Automatic dialing device for telephones

Country Status (2)

Country Link
KR (1) KR200230948Y1 (en)
WO (1) WO2002067556A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278854A (en) * 1986-05-27 1987-12-03 Sharp Corp Telephone set with automatic dial function
US5539819A (en) * 1993-07-19 1996-07-23 Bell Systems 24 Inc. Credit card which generates a DTMF tone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278854A (en) * 1986-05-27 1987-12-03 Sharp Corp Telephone set with automatic dial function
US5539819A (en) * 1993-07-19 1996-07-23 Bell Systems 24 Inc. Credit card which generates a DTMF tone

Also Published As

Publication number Publication date
KR200230948Y1 (en) 2001-07-19

Similar Documents

Publication Publication Date Title
US5425085A (en) Least cost routing device for separate connection into phone line
EP0063672A1 (en) Telephone music device
US5146493A (en) Communication system
JPS63500694A (en) phone line switch
JPS58111468A (en) Telephone automatic dial signal transmitter
WO2002067556A1 (en) Automatic dialing device for telephones
US5241590A (en) Telephone dialing apparatus
US4117266A (en) Recorder actuator for communication lines
US4419543A (en) Tone activated hold circuit
US6044149A (en) Device for detecting DTMF tones
US6118867A (en) Tray for automatic dial telephones
US6678373B1 (en) Shortcut dialing apparatus for telephone set
JPS5923664A (en) Automatic dialing device
US4868847A (en) Telephone intercom device
AU687924B2 (en) Activation circuit of telephone subset
US5872838A (en) Trim phone circuit device having a calling line identification
KR100354985B1 (en) Keyboard having multi-function telephone using line power
KR200195735Y1 (en) Portable circuit automatic selector
JPH0127316Y2 (en)
JPH0638526Y2 (en) Telephone power circuit
KR890005718Y1 (en) Telephone line state sensing circuit
KR900011242Y1 (en) Circuit to control audio system
KR930702165A (en) Telephony Card Use System
KR950002759B1 (en) Apparatus for recording a call number in the cardphone
JPH0150155B2 (en)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1) EPC OF 081203

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP