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MXPA98002859A - Device and method for radiolocation with response of - Google Patents

Device and method for radiolocation with response of

Info

Publication number
MXPA98002859A
MXPA98002859A MXPA/A/1998/002859A MX9802859A MXPA98002859A MX PA98002859 A MXPA98002859 A MX PA98002859A MX 9802859 A MX9802859 A MX 9802859A MX PA98002859 A MXPA98002859 A MX PA98002859A
Authority
MX
Mexico
Prior art keywords
radiolocation
voice
signal processor
digital signal
compressed
Prior art date
Application number
MXPA/A/1998/002859A
Other languages
Spanish (es)
Other versions
MX9802859A (en
Inventor
Robert Shively Richard
Original Assignee
At&T 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 US08/837,174 external-priority patent/US6370375B1/en
Application filed by At&T Corp filed Critical At&T Corp
Publication of MX9802859A publication Critical patent/MX9802859A/en
Publication of MXPA98002859A publication Critical patent/MXPA98002859A/en

Links

Abstract

The present invention solves the current problem of allowing ad-hoc (manual) voice response by a user to a radiolocation assembly received by a radiolocation device. In one aspect of the invention, a radiolocation device includes a digital signal processor for receiving and compressing a voice response to a radiolocation assembly before transmission back to the party sending the radiolocation message. In further aspects of the invention, speech is first recorded and compressed and then transmitted to a wireless base station for subsequent transmission to the party calling

Description

DEVICE AND METHOD FOR RADIOLOCATION WITH VOICE RESPONSE BACKGROUND DB THE INVENTION The present invention relates generally to radio location systems and in particular to a two-way radiolocation device with voice response. In conventional radiolocation systems, a radiolocation device receives messages from a radio transmitter of radio location network. The radiolocation device may also allow the searched party to acknowledge receipt of the message. For example, some two-day paging devices provide a mechanism for responding to a paging message to send a code back to the network that triggers a pre-programmed voice message. See, for example, U.S. Pat. No. 4,965,569. Although these systems are economical, the voice message is limited to "canned" responses. An alternate recognition system allows a voice response to be transmitted in real time (either immediately or after a delay interval) to the calling party. See, for example, U.S. Pat. No. 4,811,379. However, these systems have seen limited commercial implementation due to problems with size, cost, width requirements REF: 26819 band, limited flexibility and power consumption. Consequently, the market for two-way radiolocation systems has been limited. Accordingly, there is a need to provide ad-hoc voice response capability to a paging device while still maintaining the low power consumption, small size and low cost features of a conventional radiolocation device. COMPENDIUM OF THE INVENTION Aspects of the present invention allow voice response z a radiolocation message while maintaining the favorable characteristics of the radiolocation devices, ie low cost, small size, prolonged battery life, and simplicity of use. In one aspect of the invention, a paging device includes a digital signal processor for compressing speech before transmitting to the radiolocalizing party. Using this aspect of the invention, a radiolocation service provider can provide a new valuable service to subscribers without having to adversely raise the prices of services or increase the size or cost of the pager. In another aspect of the invention, the radiolocation device receives, digitizes, compresses and stores a response feed by a user, for example through the activation of a push-to-talk button. The radiolocator can subsequently transmit the response back to the calling party. Even in other aspects of the invention, the digitization and compression of speech does not occur at the same as the transmission of speech. In this way, it is possible to substantially reduce the peak power requirements of the radiolocation device. Accordingly, the radiolocation device only requires sufficient power to operate either the compression circuits or the transmission circuits, but not both. In other aspects of the invention, the amount of energy required by the pager can be reduced by transmitting the voice to less than the actual time. In further aspects of the invention, the radiolocation device can respond to radiolocation messages originated by electronic mail, by means of an audio file packaged in electronic mail that is transmitted back to the sender as a response message. In yet another aspect of the present invention, an improved user interface simplifies the recording and sending of ad-hoc responses. In one aspect, the pager includes a push-to-talk switch located on the radius of the locator. In yet another aspect of the invention, the push-to-talk switch includes an integrated recording switch, reproduction, review and / or stop. In still other aspects of the invention, the pager includes a mode key, a selection key, one or more cursor keys and / or telephone keypad. In still further aspects of the invention, the user interface includes a number of advantageously placed controls, which are integrated into the radiolocation device to facilitate response radiolocation. Alternate aspects of the invention include one or more of the devices, elements and / or steps described herein in any combination or sub-combination. It should be clear that the claims may be described or amended to describe any of these combinations or sub-combinations as an invention without limitation to the examples in the specification. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows an illustrative embodiment of a communication system that incorporates aspects of the present invention. Figure 2 shows an example of a pager for use in the communications system that incorporates aspects of the present invention.
Figure 3 shows a block diagram of a modality of an architecture suitable for use in the radiolocation device. Figure 4 shows a flow process diagram describing an aspect of the operation of the radiolocation device illustrated in Figure 2. DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Figure 1 shows an illustrative embodiment of a communications network 1 incorporating the present invention. A calling party may attempt to radiolocate a radiolocation device user through communication network 1.
In exemplary embodiments, the communication network 1 may comprise a number of interconnected sub-networks such as the cellular network 4, a public switched telephone network (PSTN) 5, a private exchange 7, a network connection 8 (for example a local area network (LAN), a wide area network (WAN) and / or an Internet connection), a radiolocation area 6, and / or other conventional network structure. The connection of the calling party to the network can be configured in different ways. For example, first, second, third, fourth and fifth parts calling / devices 2a, 2b, 2c, 2d, and 3c can respectively connect to the radiolocation communication network 1 via the cellular network 4, PSTN 5 PBX 1, the network connection 8 and / or the radiolocation network 6. Each of the calling parties can respectively be assigned a calling party number and / or another network identification address such as an IP address. The calling parties can communicate with each other and / or any of a plurality of radiolocation devices 3a, 3b, 3c. The term "radiolocation network" is a generic term, which may be used to define the communication network operating to radiolocate any of the radiolocation devices 3a, 3b, 3c. As illustrated in Figure 1, the radiolocation network can undoubtedly have separate facilities from other wireless communication networks or it can use the cellular communications network as the means to radiolocate the radilocalization devices. For example, communications with the radiolocation devices may occur using the configuration channel of the cellular base station as the radio frequency (RF) transmitter to send the message to the radilocalization device. Further, when using a conventional wireless cellular base station, it may be convenient to use the spare channel control capability, to allow the modest communications load resulting from implementations of embodiments of the invention, as described herein. The use of spare control channel capability allows the implementation of a new valuable service with little or no additional infrastructure. The use of the radiolocation network allows for packet communication tolerance of some system latency and therefore provides a platform to implement a low-cost, low-power, two-way radiolocation device in accordance with the aspects of the present invention. With reference to Figure 2, a perspective view of a first exemplary embodiment of a radiolocation device 3 is illustrated, including one or more user interface mechanisms. In the illustrated embodiment, the radiolocation device 3 includes a display 24, a speaker 25, a push-to-talk switch 26 (which may be an integrated slider for recording, reproducing, rewinding and stopping as is conventionally employed. in devices for executive dictation), a fast-forward control 27, a response control of sending / review-playback of incoming messages 28, a volume control 29, a microphone 10, a low-battery indicator, 11, a telephone keypad 12, cursor keys up and down 13, 14, a mode key 15 and a selection key 16, an on-off switch 17, and a communications gate such as an infrared data gate 18. It should be noted that a horn 25 is not essential. In some applications, where energy conservation is fundamental, a horn 25 may not be employed. Figure 3 shows an exemplary architecture for implementing the radiolocation device 3 in accordance with aspects of the present invention. The embodiment illustrated in Figure 3 may include conventional one-way radiolocation circuits 30 for receiving radiolocation messages, RF transmission circuits 32 for transmitting ad-hoc responses, speech processing circuits 31, for speech processing, interface circuits user 33 for interconnecting with a user and control circuits 34, for control circuits in the radiolocation device 3. The speech processing circuits 31 can be configured in a variety of ways to include a microphone, a speaker, a D / A converter , an A / D converter, a memory device (for example RAM, flash RAM) and / or a digital signal processor (DSP). The speech processing circuits 31 can be configured to feed speech through the microphone, digitize speech, compress speech using the digital signal processor, store speech and output speech to the transmitting circuits. The speech processing circuits 31 can also be configured to convert the digitized speech back into analog form before reproduction or transmission to other devices. The compression algorithm employed by speech processing circuits can be configured in a variety of ways as is well known in the art and can use a form of linear predictive coding (LPC) to compress speech for storage and / or transmission . Speech can be compressed in real time, or it can be compressed over an extended interval that is not real time. The compressed speech can be decompressed and reproduced, so that the user can verify and / or edit the previously recorded message. The user interface circuits 33 may be configured in a variety of ways to include the display 24, the push-to-talk switch 26, including optional controls for a combined sliding switch for recording, playback, rewinding and stopping, control, Fast forward 27, the response control of sending review-playback of incoming messages 28, the volume control 29, the microphone 10, the low battery indicator 11, the telephone keypad 12, the up and down arrow keys downwards 13, 14, the mode key 15, the selection key 16, the on-off switch 17, the communication gate 18 and / or other user interface circuits. Control for the user interface circuits is provided by the control circuits 34. The control circuits 34 can be an integrated controller or other suitable apparatus to provide control for the circuits in the radiolocation device 3. The control circuits can also be controlled. include energy management control, to selectively place one or more of the circuits in the radiolocation device 3 from an active mode to a standby, standby, or idle mode to conserve energy. For example, the power management control may operate to allow either the speech transmission or compression circuit in the speech processing circuits 31, such that these circuits are not energized at the same time. The transmitter circuits 32 may use the same circuits currently used for radiolocation devices with two-way recognition or may include other suitable transmitter circuits. Operational details and construction of the circuits used in radiolocation devices with two-way recognition, wireless base stations, digital dictation devices, and connected cellular computers, are well known to those skilled in the art. For simplicity, the conventional circuits used in these devices that are also included in the previous examples are not described in more detail in the present application. The novelty of the present invention is found in the new combination and use of these circuits in a radiolocation device with voice response, to provide new valuable service to the subscribers, while maintaining the small size and relatively low cost of the radiolocation device conventional. The radiolocation device 3 may have a relatively small form factor, such that it is approximately "palm size" and / or is small enough to fit in the pocket of a wearer's shirt. In the illustrated embodiment, the radilocalization device 3 is illustrated held in the palm of a user's hand 22. The small size of this device is made possible by a number of technical advances in the operation of the circuits in the radiolocation device, as described herein. In operation, the radiolocation device 3 can receive audio and / or digital radiolocation messages like any other conventional radiolocation device. The present device also allows the user to acknowledge the radiolocation message and transmit a short message unnecessarily by searching for a telephone or including an unacceptably large alpha-numeric keypad. In addition, it is possible to provide an ad-hoc voice response while maintaining the low power and low cost structure associated with the radiolocation devices. The lower costs associated with the radiolocation devices are largely due to the low power consumption and the messaging nature of the radiolocation devices. The present device allows a user to record or record an ad-hoc message, for example by moving the switch 26 in a recording mode and speaking into the microphone 10. The speech can then be converted to digital format by using an analog / digital converter (A / D), compressed using a signal processor and a convenient voice compression algorithm and stored in a memory for later reproduction or transmission. In exemplary embodiments, the radiolocation device may utilize an integrated digital signal processor of low power consumption, A / D converter, and / or memory. The digital signal processor may include a low power consumption idle mode and an active mode.
If the particular mode of the radiolocation device is equipped with a speaker, the user may optionally review, edit, and / or re-record the message before transmission. For example, by moving the switch 26 to the rewind position and then to the playback position, the voice messages can be reviewed before transmission. The re-bouncing position simply retracts the present audio message to be sent in the memory. If necessary, the user can modify the message by recording all or a portion of the message. When satisfied with the content of the message, the user can store the message using the mode key 15, cursor controls 13, 14 and associated display commands, - send the message to any of a number of stored telephone numbers that are stored. supplied by the keyboard 12 or gate 18 (including a broadcast option); or responding to a previously received radiolocation, by providing one or more commands, for example again by pressing the play / answer button 24 after reviewing a data message or voice input. In some embodiments, the user interface of the radiolocation device 3 optionally includes the upward cursor control button 13, the downward cursor control button 14, the mode key 15 and the selection key 16 and / or display 24. In these modes, it is possible to allow a large number of functions and modes with a minimum number of user control buttons. Although an alphanumeric keyboard can provide more flexibility, the large size of the keyboard makes its incorporation into the relatively small form factor of the pager, impractical absent from a deployable keyboard design or sophisticated clam shell. If a clamshell or pull-out keyboard is used, the keyboard preferably has keys on both the length of the pager and the unfolded portion. The use of voice response increases the usability and flexibility of the pager, without the added cost of an expensive keyboard. In some modalities, no keyboard is not necessary in fact. The pager can be operated under voice control, using a simple push-to-talk switch. Alternately, the use of the on-screen image, mode, and selection scroll key greatly increases the functionality of the user interface by allowing the user to provide any of a number of different modes with only a limited number of keys in the user interface. In this way, the user can initiate calls and email, answer calls and email, as well as review and check stored data, such as phone numbers stored using only a subset of keys. A main feature of a pager mode is the incorporation of a voice compression processor (eg, the digital signal processor) in the pager and a second processor with voice decompression in the paging network (eg, in a wireless base station). . For example, the voice can be compressed in the approximate order of 2.5 kilobits per second. In this way, the transmission speed between the pager and the radilocalization network can be at a slower speed, for example 100, 200, 300, 400 or 500 bits per second. By slowing down the transmission rate between the radiolocation devices 3a, 3b, 3c and the radiolocation network 4, energy can be conserved while still allowing ad-hoc voice response messages. By providing a return link from the radiolocation device (typically in the form of a message service instead of a variant of a cellular telephone service) at a slower rate, the advantageous cost and size of the pager can be maintained. In addition, the output data can be formed in packets in such a way that they can be sent in widely varying time frames and reassembled by a signal processor associated with the radiolocation network for transmission back to the calling party. For even better performance, the response back to the calling party may use a cell relay or frame relay type packet configuration, to minimize the amount of general space associated with the particular packet. The radiolocation device with current speech response allows a number of useful applications of the communication network 2. For example, a first exemplary mode of operation of the communication network 2 will be described with reference in Figure 4. Figure 4 shows a flow process diagram for operating the present invention. The radiolocation device will continue to operate normally (receiving pages) until the user interface (for example the push-to-talk button 26) is activated (step 40) by the user of the radiolocation device, usually in response to a message received radiolocation and / or a desire to communicate with an originating / calling party number (for example, a number that is sent to the radiolocation device). By pressing the user interface, the digital signal processor is activated (step 41) and records voice signals that are received from the user, through the microphone and digitally stores the voice, using a pre-programmed digital signal processor algorithm. Recording continues until the user releases the press-to-talk button (steps 43, 45). To ensure the low power operation of the radiolocation device, a maximum limit of the recording time can be provided in the digital signal processor (for example 5 seconds). After finishing voice recording, the digital signal processor can return to an idle mode that requires less power than needed during current voice recording. After finishing a voice recording (user interface released by the user) and preferably a preprogrammed delay (less than real time response) to further ensure low power consumption, the RF transmitter is activated (step 44) to transmit the voice message recorded to a wireless base station in the radiolocation network, which may be the base station with the highest signal strength received from the configuration channel (step 46). To ensure optimal connectivity with the calling party number, the radiolocation device, after the conventional cell phone tuning procedures, can send a source request to the configuration channel and the configuration channel can respond with an acknowledgment signal indicating that a voice connection path is available to the voice communications system of the calling party number of origin (or other of the number). Following receipt of the recognition signal, the RF transmitter, using conventional radio processing techniques, will send the recorded voice message signal in the configuration channel for subsequent transmon to the calling party number (or other number) before connection Voice set to the calling party number. As can be seen, the present invention provides voice response capability to the user of the radiolocation device, without sacrificing low power consumption. This ensures provision of the familiar voice message service to the user of the radiolocation device, with the addition of the voice message feedback service to the calling party number of origin. In alternate modes, the voice response system can be used in any number of applications. For example, parents can use the voice response system to track children. Upon receiving a radiolocation message, a child can inform a parent where they are and the expected time of return. In addition, the child can request that his father come and pick him up from a party, sports event or other activity. The device can also be used by businessmen to communicate with their repair personnel who may be in the field. In this way, the repair staff does not have to stop to locate a phone or use / carry a radio. Repair personnel can simply respond using the radiolocation device. Still in other modalities, the radiolocation device with voice can be issued by an automobile association and all its members. The radiolocation device can be very economical and therefore distributed at minimal cost. Each of the users of the automobile club can track the radiolocation device in the glove compartment of their cars. The radiolocation device can be pre-programmed to call a centralized site to report the need for assistance on the road or highway. And respond to the vehicle the approximate time the help will arrive. In this way, the person in the car can gradually indicate their location and does not need to leave the vehicle to ask for help, greatly increasing the safety of the occupant of the vehicle. Additionally, the radiolocation device may be pre-installed in the car as optional equipment. In still other embodiments of the invention, a user may employ the radiolocation device to obtain and send electronic mail. The recovered email will be displayed on the screen in the radiolocation device. Response email will be recorded by voice as a digital file, for example as a XXX.WAV file that can be processed by most modern email systems. In this way, the user can respond to the received email, while it is far from a terminal. To read the email, the user simply presses or selects by pressing the mouse button when the desired option is indicated on an icon representing the XXX.WAV file. Similarly, links to a user's voice mail may be provided, such that voice mail can be verified and answered without the use of a telephone. In these and other modalities, it may be useful to use an IRD port to load predefined phone numbers, messages, names, addresses, reminders, calendars, etc., into the radiolocation device, to be used as a portable information manager. In still further examples by providing numbers and / or email addresses to the device, either as pre-programmed numbers through the infrared port and / or through the keyboard, it is possible to initiate calls, so that a user can send a message voice and / or email your wife or vice versa, to notify you of any pending event, for example accompanying dinner, or a delay when you get home for dinner. In yet another example, the radiolocation device can be used either alone or in conjunction with a calendar system based on electronic mail, to alert the user of a scheduled event. For example, the user may have a scheduled event alarm set for 4:00 P.M., on a certain day that is delivered to the calendar on his computer or directly to his pager via the user interface (for example, the IRD port). If the calendar program is used, when the alarm is indicated, the calendar program will initiate an email to the pager alerting the user of the scheduled event and containing a message describing the entry to the calendar. In addition, the user can use the pager as a personal digital messaging buffer to store personal e-mail notes (for example, things to do) on his or her workstation back to the office. For example, while driving home, the user can think of a task that needs to be done the next day. The user can use the radiolocation device to send an email recorded by digital voice, that will remind you of the task to be performed. Additionally, in still further embodiments, the user or a system administrator can download updated telephone numbers, email addresses, and / or operating code directly to the radiolocation device by means of a sequence of command codes in the network. In this way, all radiolocation devices can be re-programmed to allow new features, services and / or modified communication parameters such as addresses (e.g. telephone numbers, e-mail addresses). The re-programming can be stored in a non-volatile memory device such as flash RAM in speech processing circuits 31 or control circuits 34. Although the present invention is described using a push-to-talk button interface, other modes may use a different interface such as a touch-sensitive screen or a voice-activated interface. For example, each of the aforementioned user interface functions can be achieved by a touch-sensitive screen or by voice recognition scripts whose implementation is well known in the art. Accordingly, it is intended that the appended claims cover all these modifications. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims (33)

  1. CLAIMS 1.- A radiolocator for use in a radiolocation communication system, characterized in that it comprises: a microphone for converting the received voice signals into electrical signals, - a digital signal processor, coupled to the microphone, configured to receive, compress and store electrical signals as compressed voice signals; a switch coupled to the digital signal processor, to selectively activate the digital signal processor; and a radio frequency (RF) transmitter, coupled to the digital signal processor for transmitting the compressed speech signals to a wireless base station within a radiolocation network.
  2. 2. - The pager according to claim 1, characterized in that the digital signal processor includes an inactivity mode, and an active mode, the digital signal processor is configured to operate normally in the inactivity mode and then to operate in the active mode during reception, compression or storage of electrical signals.
  3. 3. The radiolocator according to claim 1, characterized in that the compressed voice is transmitted at a lower speed than real time.
  4. 4. - The pager according to claim 3, characterized in that the compressed voice is formed into packets before transmission.
  5. 5. The radiolocator according to claim 1, characterized in that the compressed voice is transmitted at a different time to a period of time in which the electrical signals are compressed by the digital signal processor.
  6. 6. - The pager according to claim 1, characterized in that the switch is an integrated switch for recording, reproducing, re-bobbing and stopping.
  7. 7. The radiolocator in accordance with claim 1, characterized in that it includes a telephone keypad and excludes real-time voice communication capabilities.
  8. 8. The radiolocator according to claim 1, characterized in that it includes an infrared port.
  9. 9. The pager according to claim 8, characterized in that the infrared port includes circuits for sending out voice messages as digital signals.
  10. 10. - The radiolocator according to claim 8, characterized in that the infrared port includes circuits for feeding directions.
  11. 11. The radiolocator according to claim 10, characterized in that the addresses include telephone numbers.
  12. 12. - The pager according to claim 10, characterized in that the addresses include e-mail addresses.
  13. 13. The pager according to claim 1, characterized in that it includes a display, a mode key and a selection key for choosing an operation mode.
  14. 14. The pager according to claim 1, characterized in that it includes an exhibitor, a key to raise the cursor and a key to lower the cursor, to scroll the screen image through the received messages.
  15. 15. - A method for re-programming a radiolocation device comprising downloading operating parameters over a radiolocation network to a non-volatile memory in the radiolocation device and using the operating parameters to modify the operations of a processor in the radiolocation device .
  16. 16. - The method according to claim 15, characterized in that downloading the operating parameters includes downloading updated operating codes to control the operations of the radiolocation device.
  17. 17. The method according to claim 16, characterized in that using the operating parameters includes adding additional functions in the radiolocation device.
  18. 18. The method according to claim 15, characterized in that downloading the operating parameters includes downloading updated telephone numbers or updated email addresses.
  19. 19. - A communication network characterized in that it comprises: a radiolocation network that includes a wireless cellular base station that has a control channel; a plurality of radiolocation devices communicating with the radiolocation network over the control channel, wherein each radiolocation device includes a microphone for converting voice signals into electrical signals, a digital signal processor coupled to the microphone, for receiving, compressing and storing the electrical signals as compressed speech signals, a switch coupled to the digital signal processor to selectively activate the digital signal processor and the radio frequency (RF) transmitter coupled to the digital signal processor, to transmit compressed speech signals to
  20. 20. The communication network according to claim 19, characterized in that it includes a local area network or a wide area network connected to the radiolocation network, to communicate the signals of compressed voice to a intended recipient such as a Email message.
  21. 21. The communication network according to claim 20, characterized in that the e-mail message appears as an icon, when the intended recipient opens the e-mail message which, when activated, reproduces the voice message fed by the device. of radiolocation.
  22. 22. - The communication network according to claim 20, characterized in that the local area network or wide area network includes the Internet.
  23. 23. The communication network according to claim 19, characterized in that it includes a power configured to allow the user to initiate voice calls in packets, not in real time to a selected number per user.
  24. 24. - The communication network according to claim 19, characterized in that it includes a user interface and a configured controller, to allow the user to initiate non-real-time e-mail messages, in packets to a selected e-mail address by the user.
  25. 25. The communication network according to claim 24, characterized in that the radiolocation device includes an infrared port configured to feed a plurality of email addresses selected per user.
  26. 26. A method for operating a radiolocation device characterized in that it includes configuring a communication network to transmit electronic mail messages from an electronic calendar system to a radiolocation device to alert the user of the radiolocation device of a scheduled event.
  27. 27. The method according to claim 26, characterized in that the radiolocation device displays a message describing the scheduled event.
  28. 28. - A method for operating a radiolocation device characterized in that it includes feeding, digitizing, storing and compressing and then transmitting the compressed voice to a radiolocation network.
  29. 29. The method according to claim 28, characterized in that the compressed voice is transmitted at a speed that is less than real time. The method according to claim 28, characterized in that it includes forming compressed speech packets before transmission. 31. The method according to claim 28, characterized in that it includes transmitting the compressed voice at a different time to a period of time in which the voice is compressed. 32. The method according to claim 28, characterized in that it includes using an integrated switch for recording, reproducing, re-bobbing and stopping to feed the voice. 33. The method according to claim 28, characterized in that it includes transmitting the compressed voice as an email message.
MXPA/A/1998/002859A 1997-04-14 1998-04-13 Device and method for radiolocation with response of MXPA98002859A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/837,174 US6370375B1 (en) 1997-04-14 1997-04-14 Voice-response paging device and method
US08837174 1997-04-14

Publications (2)

Publication Number Publication Date
MX9802859A MX9802859A (en) 1998-12-31
MXPA98002859A true MXPA98002859A (en) 1999-02-01

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