Radiotelephone for automatically dialing remotely programmed
Contents
1. 379 58 WO81 02824 10 1981 PCT Int l Appl 087 01537 3 1987 PCT 11 Appl 4 7 14 088 10039 12 1988 Int l Appl 2170977A 8 1986 United Kingdom HO4M 11 06 RECEIVER SIGNAL PROCESSING CIRCUITS RECEIVER PRONT END DEMODULATOR PROCESSING 378 CIRCUITS INTERFACE MICRO ect SIGNAL OTHER PUBLICATIONS Motorola brochure Your Portable Connection America Series Cellular Portable Telephones by Mo torola Jan 1989 brochure America Series Cellular Mobile Tele phones by Motorola 1989 brochure Nokia LX11C Car To Car Transferable Nokia Mobira May 1990 Primary Examiner Curtis Kuntz Assistant Examiner Dwayne D Bost Attorney Agent or Firm Jones amp Askew 57 ABSTRACT A remotely programmable radiotelephone and a remote programming unit The radiotelephone 10 includes a receiver front end and demodulator 23 receiver signal processing circuits 30 a dual tone multiple frequency converter 31 a controller 50 and a memory 51 The converter 31 converts DTMF tones into digital signals The controller 50 monitors the output of the converter 31 If the output corresponds to a valid command then the controller 50 executes the com mand Certain commands must be preceded by the user entering an access code using a control keypad 56 and by the reception o2. 1 LIN a5vecaw OL i 92 2 5 276 729 Sheet 3 of 7 Jan 4 1994 U S Patent 321340 e ONIHDLIMS ANWd WOOD ANOHda TS Spor SANGHA A TAL 1 1 321440 901 901 SNOHd 373 4Wid GAavVGNvis Weil Tavd JAHILO Voll 321440 SAANA 201 131 aavanvis 1014 73821420 5 276 729 Sheet 4 of 7 Jan 4 1994 U S Patent HILIMS NINWVA5O0 d BALOWAY AALASANOD 4IW10 YOLVAANAS JWA LNO YWALASANOD 10201034 MI AYOW3W bel 221 INVAAALNI Sel 21 121 2 291 U S Patent Jan 4 1994 Sheet 5 of 7 5 276 729 10 e RADIOTELEPHONE Zi SA 0 Lin 35B On T io i 142 143 18 7 RADIOTELEPHONE 0 WAT 5 276 729 Sheet 7 4 1994 0 8 Patent 3791330 ANVdW0D 231 321430 ANVdWO0 SNOHdATSL 5 276 729 Sheet 7 of
3. phone 58 Controller 49 is connected to and controls the operation of keypad 56 and display 57 For some radio telephones particularly mobile radiotelephones which are installed in an automobile and which cannot also be used as portable radiotelephones user interface section 14 may be physically separate from the remainder of radiotelephone 10 so that only user interface 14 is pres ent in the passenger compartment of the vehicle 5 276 729 7 FIG 2 is a block diagram of the Vehicle Adapter Unit VAU 60 used with the radiotelephone of the present invention VAU 60 allows radiotelephone 10 to be used as portable radiotelephone portable mode when radiotelephone 10 is separate from VAU 60 and as a mobile radiotelephone mobile mode when radio telephone 10 is connected to VAU 60 It will be appre ciated that VAU 60 is designed to be installed in a vehi cle not shown For reasons of cost weight size power consumption convenience in changing options and marketing considerations voice synthesizer 63 message player 64 hybrid and interface circit 65 and jack 66 are placed in VAU 60 instead of in radiotele phone 10 However if desired these components may be placed in radiotelephone 10 Also if desired DTMF converter 31 may be part of VAU 60 In this case radio telephone 10 will only be remotely programmable when it is installed in VAU 60 VAU 60 has a plug 61 which makes mechanical and electrical contact with jack 48
4. 23 or tone generator 40 and provides this selected signal to a selected one of speaker 54 or jack 48 Transmitter signal processing circuits 32 receives voice signals from microphone 58 of user interface sec tion 14 over signal path 37A DTMF and other tone signals from tone generator 40 and voice and other analog signals from jack 48 over signal path 37B and receives control signals from controller 50 over signal path 25 The control signals on signal path 25 may be digital signals intended for the MTSO concerning such functions as request to place an outgoing call a tele phone number to be dialed incoming call answered etc The digital signals on signal path 25 the tone sig nals the analog signals or the voice signals as selected by controller 50 are provided by transmitter signal processing circuits 32 to transmitter 24 Transmitter signal processing circuits 32 also performs such func tions as bandpass or lowpass filtering for voice tone and analog signals and signal waveform shaping for digital signals Control section 13 includes a controller 50 a memory 51 an interface 46 a jack 48 and a keypad and display controller 49 In the preferred embodiment controllers 20 25 30 35 40 45 50 55 60 65 6 49 and 50 are embodied as microprocessors Memory 51 contains a ROM which has the operating instructions for controller 50 RAM which provides for the tempo rary storage of information and an
5. remotely programmed and controlled The control ler inspects the DTMF tones received for the presence or absence of access and or security codes and for the instructions that the controller is to execute One level of access allows the secretary to cause the user s radio telephone to dial a telephone number a specified sequence of telephone numbers Upon instruction by the user the secretary would look up the telephone number or speed dial bin number for the desired party and key in the command to dial that number using the DTMF keypad on the secretary s telephone thereby causing the radiotelephone to dial the desired number This procedure requires minimum action on the part of the user The user could simply call the secretary using for example a known speed dial bin or the user could instruct the secretary to call the user at predetermined times or at predetermined intervals This eliminates the need for the user to make any keypad entries in order to implement a telephone con 5 276 729 3 versation This allows the user to keep his her eyes on the road and hands on the steering wheel The user can therefore pay attention to the traffic conditions and quickly respond to changing traffic conditions The present invention also allows the dealer to re motely program the radiotelephone The dealer dials the telephone number corresponding to that radiotele phone or the user dials or causes to be dialed the tele phone num
6. serial data signals via plug 143 For reasons of security and or convenience in use some commands may only be sent when radiotelephone 10 is installed RPU 111 In applications where a computer 161 is used RPU 111 functions simply as a protocol converter in FIG 5D or as a DTMF generator receiver in FIG 5E between the computer 161 and radiotelephone 10 FIG 6 is an illustration of a portable radiotelephone 10 installed in a remote programming unit 111 RPU 111 has a contro keypad 126 a display 125 a line jack 135 a telephone jack 137 an RS 232 jack 140 a connecting cable 142 and a plug 143 Plug 143 is shown inserted 0 25 35 40 45 50 55 65 16 into jack 48 of radiotelephone 10 Also shown are the speaker 54 microphone 58 keypad 56 display 57 and antenna 21 of a portable radiotelephone 10 It should be noted that keypad 126 of RPU 111 con tains keys for the standard DTMF tones as well as the DTMF tones A B C and D The keypad 56 for radio telephone 10 has standard DTMF keys 0 9 and as well as keys for the following functions SEND CLEAR END RECALL STORE MENU and AL PHA Displays 57 and 125 are eight character two line displays In addition display 57 has indicator lights for the following conditions received signal strength in use service not currently available roaming in an A system roaming in a system AutoAnswer mode on menu review and alpha characte
7. user to said telephone number by sending a said modulated transmit sig nal corresponding to said telephone number to be called 2 A method for operating a radiotelephone said method comprising the steps of providing a demodulated signal in response to a re ceived signal 10 15 20 25 30 35 45 50 55 65 18 providing digital signals corresponding to dual tone multiple frequency DTMF tones contained in said demodulated signal said DTMF tones corre sponding to a telephone number and an instruction to automatically dial said telephone number said telephone number and said instruction being pro vided by a connected party during a first call and when a user is present responding to a predetermined set of said digital signals by causing said radiotele phone to store said telephone number and upon completion of said first call causing said radiotele phone to automatically place a second call without a dialing operation by said user to said telephone number by sending a modulated transmit signal corresponding to said telephone number to be called
8. which can be remotely controlled so as to cause the radiotelephone to dial desired telephone numbers with little or no action on the part of the user Typically the radiotelephone is programmed by a dealer to allow the use of specified features and use in predefined areas However many users travel through one or more radiotelephone service areas in the course of their personal business affairs and may find that addi 10 15 20 25 30 35 40 45 50 55 60 65 2 tional areas a different class of service different operat ing privileges etc are desired The process of changing any of these operating parameters is generally an incon venience to the user because the user must return to the dealer to have the radiotelephone reprogrammed It would be more convenient for the user if the radiotele phone could be remotely programmed by the dealer Therefore there is a need for a radiotelephone which can be remotely programmed by a dealer so as to change the class of service areas of service and other operating parameters However the radiotelephone should prevent unauthorized persons from changing the operating parameters Furthermore in the case of a non paying user or a stolen radiotelephone it is desirable to prevent the fur ther use of the radiotelephone Therefore there is a need for a radiotelephone which can be disabled by remote contro However the radiotelephone should prevent unauthorized perso
9. 7 Jan 4 1994 U S Patent 0 0 gt B Zin 5 276 729 1 RADIOTELEPHONE FOR AUTOMATICALLY DIALING REMOTELY PROGRAMMED NUMBER UPON CALL TERMINATION AND WITHOUT USER OPERATION This is a continuation of application Ser No 579 894 filed Sep 10 1990 TECHNICAL FIELD The present invention relates to radiotelephones and more particularly to the remote programming and con trol of radiotelephones by using standard DTMF tele phone tones BACKGROUND OF THE INVENTION Portable and mobile radiotelephones once a rarity have now become almost commonplace Many users now find a radiotelephone to be a personal and or busi ness necessity However the use of a radiotelephone when driving can provide a safety hazard because the user must typi cally look away from the road toward the control key pad in order to dial the desired telephone number This brief inattention to the driving environment can cause an accident especially in fast moving and or congested traffic Of course it is possible to provide speed dial functions so that the user may preprogram commonly called telephone numbers into a memory in the radio telephone and when the user desires to place a call the user simply punches in a smaller set of numbers typi cally two or three digits to cause the radiotelephone to extract the telephone number from the memory and dial t
10. LOCK code be known The dealer LOCK code is useful when an incorrect UNLOCK code has been entered or the UNLOCK code is not known If a default password was sent but is inappropriate or if an invalid master password or an invalid dealer pass word was sent then radiotelephone 10 will send the error signal to RPU 111 The dealer may then enter another password If a dealer password has not been programmed into radiotelephone 10 then the factory installed default password will be a valid password Radiotelephone 10 will then send a PASSWORD signal B to RPU 111 which will indicate to the dealer that new password must be programmed into radiotelephone 10 before any other functions can be accomplished The dealer is requested to enter the pass word twice If the same new password is entered twice 5 20 25 30 35 45 50 55 65 12 then radiotelephone 10 will send the VALID CODE signal to RPU 111 and store the new password The dealer may then enter the dealer commands described below If there is a difference between the first new password and the second new password then radiotele phone 10 will send the INVALID CODE signal to RPU 111 RPU 111 will then advise the dealer to repeat the new password procedure The password is entered the format PASSWORD where the PASS WORD must be 10 digits After each of the following dealer commands radio telephone 10 will respond with either the OK code or wi
11. United States Patent Higuchi et al US005276729A 1 Patent Number 5 276 729 45 Date of Patent Jan 4 1994 54 RADIOTELEPHONE FOR AUTOMATICALLY DIALING REMOTELY PROGRAMMED NUMBER UPON CALL TERMINATION AND WITHOUT USER OPERATION 75 Inventors Masayuki Higuchi Norcross Stephen Hardin Snellville both of Ga Otake Kodama Japan 73 Assignees Oki Telecom Suwanee Ga Oki Electric Ind Ltd Tokyo Japan 21 Appl 913 738 22 Filed Jul 14 1992 Related U S Application Data 63 Continuation of Ser No 579 894 Sep 10 1990 51 Int 04 11 00 52 0 5 379 58 379 63 379 355 379 356 58 Field of Search 379 57 56 References Cited U S PATENT DOCUMENTS 4 734 928 3 1988 Weiner et al 379 59 4 803 717 2 1989 Marui 379 67 4 837 800 6 1989 Freeburg et al 379 59 4 860 336 8 1989 D Avello et al 379 63 4 893 335 1 1990 Fuller et al 379 57 4 958 368 9 1990 Parker 379 58 5 046 082 9 1991 Zicker et al 379 63 5 097 502 3 1992 Suzuki et al 379 356 5 109 403 4 1992 Sutphin 379 59 FOREIGN PATENT DOCUMENTS 0176104 4 1986 European Pat Off 0206391 12 1986 European Pat Off 3329267 2 1985 Fed of Germany 379 58 0077539 5 1985 Japan
12. a modem or a computer is plugged into jack 140 and plug 143 is inserted into radiotelephone 10 protocol converter 129 provides any necessary conversion between the protocol used by the external device and the protocol used by radiotele phone 10 In this case controller 120 does not perform any protocol conversion However it will be appreci ated that the function of protocol converter 129 may be performed by controller 120 if desired so that converter 129 may be eliminated and interface 130 connected directly to bus 121 In the preferred embodiment a speed dial bin will have an alpha numeric name field as well as a telephone number field It is possible but cumbersome to send both alpha characters and numbers by using the limited number of standard DTMF tones Therefore in the preferred embodiment the commands to read the con tents of a speed dial bin and to write to a speed dial bin are only valid when radiotelephone 10 is installed in RPU 111 Inan alternative embodiment a speed dial bin number and a telephone number may be programmed using DTMF tones A speed dial bin may be pro grammed by the user s secretary using the format BIN NUMBER TELEPHONE NUM BER Radiotelephone 10 will acknowledge entries as previously described In another alternative embodi ment the name field may also be programmed using DTMF tones This allow the user s secretary to pro gram frequently used telephone numbers into radiotele pho
13. aler to input commands and data to be provided by control ler 120 to radiotelephone 10 Memory 122 contains operating instructions for controller 120 and also stores data received from or to be sent to radiotelephone 10 Controller 120 is a microprocessor and may as part of its design contain some or all of memory 122 For some functions such as programming a number of speed dial bins the use of keypad 126 may be too slow Therefore RPU 111 has an RS 232 interface 130 which is connected to an RS 232 connector 140 This allows for the control of RPU 111 and programming of radiotelephone 10 by using a computer or a modem This is shown in more detail below In addition especially where radiotelephone 10 is a portable unit it may be desirable to program radiotele phone 10 directly rather by using DTMF tones There fore RPU 111 also contains an interface 127 a bus 142 5 10 15 20 25 30 35 40 45 50 55 60 65 14 and a plug 143 Interface 127 generally comprises buff ers and any other circuits necessary to allow communi cation between RPU 111 and radiotelephone 10 Plug 143 is inserted into jack 48 of radiotelephone 10 This allows for the direct programming of the radiotele phone In the preferred embodiment when jack 48 is used for programming radiotelephone 10 it is still nec essary to know the security code or passwords in order to accomplish programming If an external device such as
14. an Au toAnswer mode or if someone answers the call to radio telephone 10 The user will using a telephone such as telephone 101 call the telephone number for radiotelephone 10 and upon an answer or AutoAn swer enter the desired remote command The remote LOCK command is UNLOCK CODE 5 and activates the lock feature When locked and in an Au toAnswer mode radiotelephone 10 will allow incoming calls to be answered but will not allow outbound calls to be originated When locked and in the AutoAnswer Off mode radiotelephone 10 will not allow incoming calls to be answered or outbound calls to be originated The remote AutoAnswer off command is UNLOCK CODE 2 and sets radiotelephone 10 to the AutoAn swer off mode Radiotelephone 10 acknowledges the commands by sending a short tone after the the UNLOCK CODE and the number 5 and the number 2 The UNLOCK CODE is required to be entered in order to prevent an unauthorized person from locking and or tampering with radiotelephone 10 The UN LOCK code therefore functions as a user access code In the preferred embodiment the UNLOCK is a user programmable code of 1 to 8 digits If the remote Au toAnswer off command is given when radiotelephone 10 is in the mobile operating mode and either the Mes sage AutoAnswer mode or the Data AutoAnswer mode has been activated then the AutoAnswer feature will be turned off and operating power for radiotelephone 10 will be t
15. an outgoing call storing new operating information in memory 51 locking unlocking turning off the power etc Controller 50 also controls display devices 57 of user interface section 14 by means of digital signals sent via signal path 25 to controller 49 The information dis played may be the channel number the telephone num ber the speed dial bin number the presence of an in coming call the status of the current call the status of the radiotelephone 10 such as locked unlocked etc Controller 50 also inspects digital signals received from controller 49 which corresponds to key entries made using a user control device such as control key pad 56 of user interface section 14 These digital signals instruct controller 50 to perform such functions as entering a new security code unlocking locking caus ing an incoming call to be answered placing an outgo ing call using a telephone number in memory 51 or a telephone number provided by the user via control keypad 56 etc Interface 46 and jack 48 allow for controller 50 to be programmed directly using digital signals rather than by using DTMF signals This allows radiotelephone 10 to be programmed both on site and remotely Interface 46 generally comprises buffers and any other circuits necessary to allow communication between controller 50 and the device plugged into jack 48 User interface section 14 contains a speaker 54 a control keypad 56 a display device 57 and a micro
16. ber of the dealer After the user or dealer answers the call the dealer enters a security code the user enters an access code and the dealer then sends DTMF tones corresponding to the desired program ming instructions The radiotelephone of the present invention includes a radio frequency section an audio section a control section and a user interface section The RF section and the user interface section are conventional in design The audio section is conventional in design with the exception of the addition of a DTMF converter for converting DTMF tones to digital signals In addition an external adapter provides a voice synthesizer a mes sage player and a hybrid and interface which provide for connection to an auxiliary device such as a modem or a facsimile machine The voice synthesizer message player and hybrid and interface may be internal to the radiotelephone if so desired The control section is conventional in design with the exception that the con trolling microprocessor inspects the output signals from the DTMF converter to determine if instructions or data are being provided and if so whether the instruc tions or data are valid and authorized If the instructions or data and authorized then the controlling micro processor will respond using DTMF tones store the information in a memory read information from the memory execute commands and or change the appro priate operating parameters of the radiotelephone Th
17. d to an RS 232 interface 130 Telephone link 112 is connected to tele phone signal bus 134 of RPU 111 through jack 135 Switched telephone line 110 is connected to telephone bus 134 through jack 137 and switch 131 In the pre ferred embodiment jacks 135 and 137 are RJ 11 jacks Telephone jack 137 and bus 134 are selectably con nected and disconnected by switch 131 which is con trolled by controller 120 Switch 131 allows controller 120 to isolate telephone 109 when RPU 111 is conduct ing reprogramming of radiotelephone 10 and to con nect telephone 109 to telephone link 112 when RPU 111 is not conducting reprogramming Line interface 133 is connected to telephone signal path 134 is conventional in nature and performs such functions as seizing the telephone line electrically isolating the telephone line 112 from RPU 111 voltage surge limiting sending and receiving signals on telephone line 112 and ring detec tion DTMF generator 123 DTMF converter 124 are selectably connected by line interface 133 to bus 134 under the direction of controller 120 Components 123 124 and 133 allow controller 120 of RPU 111 to com municate with controller 50 of radiotelephone 10 by using DTMF tones Display 125 allows controller 120 to prompt the dealer as to the next action to be taken to display signals being sent to radiotelephone 10 and to display to the dealer the meaning of signals received from radiotelephone 10 Keypad 126 allows the de
18. ected by signal path 160 to radiotelephone 10 FIG 5D shows that in one applica tion signal path 160 includes conductor 164 and plug 143 which is plugged into jack 48 FIG 5E shows that in another application signal path 160 includes a tele phone link 112 connected between jack 135 of RPU 111 and a telephone company office 103 which is con nected by signal path 104 to MTSO 105 which is con nected to antenna 106 Antenna 21 is connected to ra diotelephone 10 FIG 5A therefore shows the use of RPU 111 to directly or remotely program radiotele phone 10 FIG 5B shows the use of a personal com puter 161 in conjunction with RPU 111 to directly or remotely program radiotelephone 10 FIG 5C shows that a personal computer located remotely from RPU 111 may be used to directly or remotely program radio telephone 10 Of course it will be appreciated that the program for personal computer 161 must understand the meaning of signals from RPU 111 display these signals to the user accept user entries from a keypad associated with com puter 161 and translate these signals into a form recog nizable by RPU 111 For example the computer key board entry 5 followed by a carriage return may mean Read Call Restriction Level RPU 111 would therefore send to radiotelephone 10 the corresponding remote command or commands using DTMF tones or if radiotelephone 10 is installed in RPU 111 RPU 111 would send the corresponding sequence of
19. electrically erasable programmable read only memory EEPROM which provides for the storage of data which needs to be re tained even when operating power is removed from radiotelephone 10 The data may be for example au thorized operating features or class of service user pro grammed telephone speed dial numbers security codes etc Controller 50 and memory 51 are connected by bus 25 It will be appreciated that controller 50 may contain some or all of memory 51 Controller 50 inspects digital signals on signal path 34 to determine whether these signals are instructions from the MTSO or are noise If the signals are instructions then controller 50 responds in accordance with the instruction such as changing the current channel of operation signalling the user that an incoming call is occurring etc Controller 50 also inspects the signals on signal path 36 from DTMF converter 31 to determine whether the signals are valid signals and if so whether any instructions represented by the signals are autho rized instructions If valid authorized instructions are received in conjunction with any required access code and or security code controller 50 responds in accor dance with these instructions Controller 50 may per form such functions as storing telephone numbers in memory 51 storing speed dial bin numbers correspond ing to desired telephone numbers in memory 51 retriev ing telephone numbers from memory 51 initiating placement of
20. erefore one feature of the subject invention is that the operating parameters of the radiotelephone may be remotely programmed by the dealer Another feature of the present invention is that the user s secretary can program one or more telephone numbers into the radiotelephone and cause the radio telephone to begin dialing the first of these numbers without any action on the part of the user This feature provides for safety and convenience because the user does not have to divert attention from driving condi tions in order to look up and or dial a desired telephone number This feature also provides for safety and con venience because the user can continue to use both hands to control the car Another feature of the present invention is that a calling party may using DTMF tones enter a tele phone number or a speed dial bin number which is stored in memory Under the control of the user the stored telephone number is recalled and displayed and if selected by the user a call is placed to that stored telephone number Another feature of the present invention is that the user s secretary or another party with whom a call has been established may using DTMF tones enter a tele phone number or the number of a known speed dial bin corresponding to the telephone number which is then stored in a scratchpad memory in the radiotelephone Once the current call has been completed the radiotele phone will automatically place a call to t
21. es for conve nience in programming the radiotelephone The RPU provides the standard sixteen DTMF tones twelve of which are typically found on conventional telephones The standard DTMF tones are used to call the radio telephone and control certain features of the radiotele phone and the other DTMF tones are used to control other features and the operating parameters of the ra diotelephone BRIEF DESCRIPTION OF THE DRAWINGS FIG 1 is a block diagram of a radiotelephone which embodies the present invention FIG 2 is a block diagram of a Vehicle Adapter Unit used with the radiotelephone of the present invention FIG 3 is a block diagram of the preferred environ ment of the present invention FIG 4 is a block diagram of the remote programming unit of the present invention FIGS 5A to SE illustrate various programming envi ronments for the radiotelephone FIG 6 is an illustration of a portable radiotelephone installed in a remote programming unit DETAILED DESCRIPTION Turn now to the drawing in which like numerals represent like components throughout the several fig ures FIG 1 is a block diagram of a radiotelephone which embodies the present invention The radiotele phone 10 has a radio frequency RF section 11 an audio section 12 a control section 13 and user inter face section 14 The RF section 11 is conventional in design and includes a connector 20 for connecting ra diotelephone 10 to an antenna 21 a duple
22. f DTMF tones corresponding to a password or security code stored in the memory 51 Some commands cause telephone numbers to be stored in the memory 51 for later recall by the user Other commands cause a number to be stored and an outgoing call to be automatically initiated The remote program ming capability allows a user s secretary to cause the radiotelephone 10 to place a call to a party specified by the user and allows a dealer to reprogram operating parameters and features of the radiotelephone 10 with out the user having to come to the dealer s place of business The remote programming unit provides for the manual or computer assisted programming of the radiotelephone 2 Claims 7 Drawing Sheets ROM RAM EEPROM KEYPAD DISPLAY CONTROLLER USER INTERFACE SECTION 5 276 729 Sheet 1 of 7 Jan 4 1994 0 8 Patent eae ee ee T ZA o1any NOTD3S Nols NOILD3SS 5 1041109 24 AV1dSId 76 bb LNOD gt 96 woudaa aL aS lace LNOUS 34484345 43 1399 ee aed Or 5 276 729 Sheet 2 of 7 Jan 4 1994 U S Patent IND
23. h as use System Carrier A only use System B only use system A if possible use System B if possible etc Write A B System Setting where P equals 0 5 for the system setting and S equals the 5 digit SID 3 44N X 4 1 5 5 276 729 13 The parameters system access telephone number a system identification number an initial pag ing channel an access overload control a group identi fier a station class options and security codes In the NAM X ONLY mode radiotelephone 10 will only use the system access telephone number specified in NAM X In the Automatic NAM Selection mode radiotelephone 10 may use the system access telephone number in any NAM subject to the A B System Set ting restriction As previously described other parties may also leave telephone numbers for the user via radiotelephone 10 Other parties 113A 113N each have a standard DTMF telephone 114A 114N respectively which is connected to telephone office 103 via a telephone link 115A 115N respectively FIG 4 is a block diagram of the remote programming unit RPU of the present invention RPU 111 includes controller 120 connected by signal path 121 to a mem ory 122 generator 123 DTMF converter 124 a display 125 a keypad 126 an RPU radiotele phone interface 127 a protocol converter 129 a tele phone line switch 131 and a telephone line interface 133 Protocol converter 129 is connecte
24. hat telephone number Another feature of the present invention is that cer tain operating functions such as LOCK and AU 10 15 20 25 30 35 40 45 50 55 60 65 4 TOMATIC ANSWER MODE OFF may be motely initiated Another feature of the present invention is that the operating parameters may be changed only by a person who knows the password Another feature of the present invention is that the Operating parameters may be changed only after the user enters the required access code at the radiotele phone Another feature of the present invention is that cer tain features may be accessed only after the required password has been entered at the radiotelephone or sent to the radiotelephone Another feature of the present invention is that the system access telephone number for a plurality of cities can be programmed into the radiotelephone Therefore if the user is going to a different city and wishes to leave the system access telephone number for that city with his her secretary the user simply scrolls through the ROAM memory bank to find the desired city and obtain the system access telephone number for that city This feature can also be used to initiate a call to the system of a particular city so that the user can contact another party who also has a radiotelephone and is located in that city Another feature of the present invention is a remote programming unit RPU which provid
25. he Data AutoAnswer mode controller 50 will cause hybrid 65 to provide standard ringing signals on jack 66 is response to signals from the MTSO that an incoming call is present Hybrid 65 will signal controller 50 over bus 25 if the auxiliary device goes off hook Controller 50 will then cause hybrid 65 to connect receiver circuits 30 and transmitter circuits 32 to the auxiliary device The incoming call is thereby connected to the auxiliary device Hybrid 65 will signal controller 50 when the auxiliary device goes onhook Controller 50 will then send a disconnect signal to the MTSO and cause hybrid 65 to disconnect the auxiliary device from circuits 30 and 32 Also if the MTSO sends a disconnect or call termination signal then controller 50 will cause hybrid 65 to disconnect the auxiliary de vice from circuits 30 and 32 The design and construc tion of hybrid circuits and interface circuits which per form the functions of hybrid and interface circuits 65 as described above are well known FIG 3 is a block diagram of the preferred environ ment of the present invention The user s office 100 15 20 25 30 35 40 45 50 55 60 65 8 contains a standard DTMF telephone 101 which is connected by telephone link 102 typically a telephone trunk line to the telephone company office 103 The telephone company office 103 is connected by tele phone link 104 to the mobile telephone switching office MTSO 105 which inc
26. he desired telephone number However the user is still required to temporarily divert his attention to the con trol keypad instead of to the driving environment The diversion time is smaller because of the reduced num ber of digits but can still become significant in many traffic situations In addition the user must be able to remember the speed dial bin corresponding to the de sired telephone number must scroll through the speed dial bin numbers displayed on the control display on systems which provide this feature or must have a table which indicates the speed dial bin number for a desired telephone number or desired party However the latter two conditions still require the user to divert attention from driving conditions and look at the con trol display or the table Also the user must take the time to program the radiotelephone Furthermore depending upon the design of the ra diotelephone and the user s manual dexterity one or both hands may be needed to initiate a call This can reduce the user s ability to control the car or quickly respond to a changing traffic condition Many businessmen businesswomen have a secretary The need for the user to divert his her attention from driving conditions in order to dial a telephone number would be eliminated if the user s secretary could from a remote location cause the radiotelephone to dial the desired telephone number Therefore there is a need for a radiotelephone
27. he use of access codes and passwords so as to prevent unauthorized persons from altering the programming of the radiotelephone It will be appreciated that the present invention also in cludes a programming unit for programming the radio telephone From the detailed description above and the accompanying drawings variations of the present inven tion will suggest themselves to those of skill in the art Therefore the present invention is to be limited only by the claims below We claim 1 A radiotelephone comprising transmitter means for providing a modulated transmit signal receiver means for providing a demodulated signal in response to a received signal tone converter means for providing digital signals corresponding to dual tone multiple frequency DTMF tones contained in said demodulated sig nal said DTMF tones corresponding to a tele phone number and an instruction to automatically dial said telephone number said telephone number and said instruction being provided by a connected party during a first call and 5 276 729 17 contro means comprising processor and a memory for storing operating instructions for said proces sor wherein said processor responds to a predetermined set of said digital signals when a user is present by storing said telephone number and upon comple tion of said first call by causing said transmitter means to automatically place a second call without a dialing operation by said
28. iver s license number This code can only be reprogrammed if the proper dealer com mand is entered Controller 50 will compare this PRO GRAMMING ACCESS code with the PROGRAM MING ACCESS code stored in memory 51 If the user has entered the correct PROGRAMMING ACCESS code then radiotelephone 10 will send an OK valid signal D to the RPU 111 which will then advise the dealer to enter the password which is an other type of security code using the keypad on RPU 111 RPU 111 will send this password to radiotelephone 10 Controller 50 will compare this password with the password stored in memory 51 If the dealer has entered a valid master password or a valid dealer password then radiotelephone 10 will send the OK signal to RPU 111 The dealer may then enter the dealer commands de scribed below If the user has entered an incorrect PROGRAM MING ACCESS code then radiotelephone 10 again prompts the user to enter the PROGRAMMING AC CESS code If incorrect PROGRAMMING AC CESS code is entered a second time then radiotele phone 10 will send an error invalid signal to RPU 111 RPU 111 will then prompt the dealer to send a dealer LOCK signal D 5 to radiotele phone 10 Radiotelephone 10 will then execute the LOCK command and stay locked until the correct UNLOCK code is entered by the user It should be noted that dealer LOCK code is different than the user LOCK code The user LOCK code requires that the correct UN
29. l processing circuits 30 are ventional in design and provide signal amplification bandpass or lowpass filtering recovery of control sig nals provided by the mobile telephone switching office MTSO noise suppression and muting of the informa tion signal received from receiver front end and demod ulator 23 A filtered selectably muted and selectably gain controlled audio signal is provided by receiver signal processing circuits 30 over signal path 33A to speaker 54 of user interface section 14 Receiver signal processing circuits 30 also provides a filtered audio signal to jack 48 via signal path 33B This signal is se lectably muted and selectably gain controlled if handsf ree operation has been selected Receiver signal pro cessing circuits 30 also provides digital output signals over signal path 34 to controller 50 of control section 13 These digital signals provide supervisory and con trol signals from the MTSO to the radiotelephone 10 for such functions as incoming call call termination switch to a different channel increase decrease power level etc Also receiver signal processing circuits 30 provides an audio signal not subject to user volume control settings over signal path 35 to DTMF con verter 31 DTMF converter 31 converts DTMF tone signals into digital signals and provides these digital signals to controller 50 Under the control of controller 50 receiver circuits 30 selects a signal from receiver front end
30. ludes antenna 106 Radiotele phone 10 includes an antenna such as antenna 21 To establish contact the user s secretary may use telephone 101 to call the telephone number assigned to radiotele phone 10 Telephone company office 103 and MTSO 105 then connect telephone 101 and radiotelephone 10 Also the user may use radiotelephone 10 to place a call to the user s office 100 Once contact has been estab lished the user s secretary will use telephone 101 to key in the telephone number or the corresponding speed dial bin number of the party or parties that the user desires to call Telephone numbers and bin numbers are entered using the format NUMBER In the preferred embodiment radiotelephone 10 has 200 speed dial bins Therefore a number between 0 and 199 will be treated as a bin number and any other number will be treated as a telephone number Radiotelephone 10 will also check the specified bin to verify that a telephone number is located in the specified bin Radiotelephone 10 will acknowledge the entry of the key which signifies the end of the number by sending a short tone These numbers are stored in memory 51 in a predeter mined memory area such as a scratchpad memory In the preferred embodiment up to 5 telephone num bers and or bin numbers may be entered After the fifth number has been entered the old numbers are replaced by new numbers on a first in first out basis As the last number is entered two different
31. modes of operation are possible manual dialing and automatic dialing For the manual dialing mode the user s secre tary simply hangs up after entering the last number and the user must cause the radiotelephone 10 to place the call Each time the user presses the SEND key one of the numbers will be called on a last in first out basis Also using control keypad 56 and display device 57 the user may scroll through the numbers and place the calls in any desired order For the automatic dialing mode the user s secretary enters a 0 after the has been entered NUMBER 0 hangs up and radio telephone 10 will proceed to automatically place the calls Each time a call is completed as indicated by the user pressing the END key radiotelephone 10 will place a call to the next number in the memory In an alternative embodiment radiotelephone 10 will also place the next call in response to the MTSO 105 sending an indication that the current call has been terminated Radiotelephone 10 has four primary operating modes which are user selectable using control keypad 56 The four operating modes are mutually exclusive and are as follows AutoAnswer Off Voice AutoAnswer Ab sence AutoAnswer and Data AutoAnswer Whenever power is turned off and then back on radiotelephone 10 will automatically by default enter the AutoAnswer Off mode wherein the user must press a key or take some action to answer an incoming call In the Voice Aut
32. ne 10 The user s secretary can cause radiotelephone 10 to call the desired number as described above or the user may enter the bin number thereby causing the radiotelephone 10 to retrieve the telephone number at that bin and place a call to that number In the preferred embodiment memory 51 also has thirty ROAM access bins which are similar to speed dial bins and may if desired be part of the speed dial bin function Each ROAM access bin has an alpha numeric city name field as well as a field for a system access telephone number for that city If the user is going to city A and then city B the user will scroll through the ROAM access bins find city A and city B and provide the telephone numbers to his her secretary The secre tary will then be able to quickly establish a call to the user via the system access number for that city Also if the user knows that the party to be called is in city C the user will scroll through the ROAM access bins find city C and press SEND This will connect the user with the system for city C so that the user can the dial the number of the party to be called To program the ROAM access bins the user presses ALPHA and STORE scrolls volume up or vol ume down to the desired bin enters the ROAM access number presses STORE enters the city name and presses STORE The user then scrolls to the next desired bin to program the information for the next city When programmi
33. ng is complete the user presses and holds CLEAR to exit the programming mode 5 276 729 15 To review the information the user presses CALL presses the key four times and then presses RECALL The user can then scroll volume up or volume down through the bins press SEND to call that city or press RECALL to exit the review mode In the preferred embodiment the ROAM access bins are programmed using keypad 56 of radiotelephone 10 or by installing radiotelephone 10 into an RPU 111 It is possible but cumbersome to send both alpha characters and numbers by using the limited number of standard DTMF tones However in an alternative embodiment a ROAM access bin number and a telephone number may be programmed using DTMF tones In another alternative embodiment the city name may also be programmed using DTMF tones FIGS 5A 5 illustrate various programming envi ronments for radiotelephone 10 FIG 5A shows RPU 111 connected by signal path 160 to radiotelephone 10 FIG 5B shows a personal computer 161 connected by signal path 162 to jack 140 of RPU 111 which is con nected by signal path 160 to radiotelephone 10 FIG 5C shows a personal computer 161 connected by signal path 162 to a modem 164 which is connected by tele phone link 165 to telephone company office 103 which is connected by telephone link 166 to modem 167 which is connected by signal path 170 to jack 140 of RPU 111 which is conn
34. ns from disabling the radio telephone Many radiotelephone users travel to different cities This can make the user difficult to locate unless the user has provided his her secretary with a table listing the system access telephone numbers for the different cities Furthermore if the user is trying to call a party who has a radiotelephone in another city then the user must look through the book to determine the system access telephone number for that city It would be advanta geous if the radiotelephone would allow for the system access telephone number for commonly used cities to be programmed into the radiotelephone so that neither the user nor the secretary had to look through the listings book Therefore there is a need for a radiotelephone which will store the system access telephone numbers for a plurality of cities In addition there is also a need for a device for re motely programming the radiotelephone The device must provide for convenient entry of any required pass words access codes security codes instructions etc and display responses and instructions from the radio telephone SUMMARY OF THE INVENTION The present invention provides radiotelephone which is remotely programmable and controllable using dual tone multiple frequency DTMF tones DTMF converter is used to convert DTMF tones into digital signals which are acted upon by the controller in the radiotelephone This allows the radiotelephone to be
35. oAnswer mode the incoming call indication on display 57 will flash the incoming call is automatically answered on the programmed ring number and the answer of the call is announced by a beep through speaker 54 portable mode or speaker 71 mobile mode Speaker 54 and microphone 58 portable mode or speaker 71 and microphone 70 mobile mode then are automatically activated The user may also answer 5 276 729 9 the call by pressing the SEND key before AutoAnswer occurs This mode of operation requires no action by the user in order to answer an incoming call It will be appreciated that controller 50 performs the AutoAn swer action in response to a signal from MTSO 105 that there is an incoming call Controller 50 causes the dis play 57 to flash and causes tone generator 40 to generate the beep and send the beep to circuits 30 and speaker 54 or 71 In the Absence AutoAnswer mode radiotelephone 10 will automatically answer the incoming call on the programmed ring number If optional message player 64 or voice synthesizer 63 has been installed then con troller 50 will cause a message to be played which prompts the calling party to key in his her telephone number followed by the key If neither voice synthe sizer 63 nor message player 64 is installed or if radio telephone 10 is in the portable mode then radiotele phone 10 will send a three burst tone signifying that the incoming call has been answered If optional synthe Size
36. one number or speed dial bin number in either of the follow ing formats NUMBER and NUMBER Radiotelephone 10 will display at display 57 the num ber of calls answered by radiotelephone 10 The user can return the calls by scrolling through the list of num bers and calling only those numbers of interest in any desired order The user can view the numbers by press ing RECALL and using VOLUME UP and VOLUME DOWN The number can be called by the user pressing SEND and can be stored in scratchpad memory by the user pressing STORE In the preferred embodiment if the calling party entered a valid speed dial bin number controller 50 will cause the telephone number to be displayed If an in valid bin number was entered then the bin number will be displayed In an alternative embodiment only the number actually entered by the calling party is dis played In the preferred embodiment memory 51 in cludes the speed dial bins described above as well as the two scratchpad areas one of which is used for storing numbers provided by secretarial access and one of 20 25 35 40 45 55 65 10 which is used for storing numbers provided during the Absence AutoAnswer mode These scratchpad areas were arbitrarily selected to store 5 numbers for secretar ial access and 9 numbers for the Absence AutoAnswer mode In the Absence AutoAnswer mode after the scratchpad area has been filled radiotelephone 10 will n
37. ot automatically answer any other calls In the Data AutoAnswer mode controller 50 will in response to an incoming call cause ringing signals to be sent to speaker 54 and will cause hybrid and interface circuit 65 to send ringing signals to an auxiliary device connected to jack 66 If the auxiliary device goes off hook controller 50 will notify MTSO 105 that the call has been answered and will then route all audio signals to and from the auxiliary device Also as previously described when the calling party or the auxiliary de vice goes on hook controller 50 will disconnect the audio path and if appropriate signal MTSO 105 that the call has been terminated In both the Absence AutoAnswer mode and the Data AutoAnswer mode controller 50 will cause the incom ing call indicator on display 57 to flash cause tone generator 40 and receiver circuits 30 to send ringing signals to speaker 54 to signify the user that an incom ing call is occurring and upon an AutoAnswer cause a single beep to be sent to speaker 54 to indicate that an AutoAnswer has occurred The user may at any time press the SEND key on keypad 56 and controller 50 will then immediately reroute the audio signals to con nect speaker 54 and microphone 58 or handset 55 or speaker 71 and microphone 70 as selected by the user In the preferred embodiment the user may remotely lock and turn off the AutoAnswer mode of radiotele phone 10 provided that radiotelephone 10 is in
38. r 63 has been installed then after the telephone number has been entered by the calling party controller 50 will cause synthesizer 63 to generate spoken words corresponding to the telephone number The calling party may signify an incorrect telephone number by pressing the key and re entering the telephone num ber Message player 64 and voice synthesizer 63 may along with the greeting message provide instructions regarding correcting an incorrect telephone number Controller 50 will cause a single burst tone to be sent to the calling party after the entry of a or a In one embodiment controller 50 will check the bin number to verify that a telephone number is stored there If a tele phone number is not present controller 50 will cause a three burst error tone or a message to be sent to the calling party advising that the speed dial bin number is incorrect If a telephone number is present in that bin controller 50 will cause synthesizer 63 to generate spo ken words corresponding to that bin number or corre sponding to the telephone number stored in that bin The calling party may signify an error by pressing the key and then re enter the bin or telephone number if the number was incorrect After the calling party has en tered his her telephone number or speed dial bin num ber controller 50 will cause the number to be stored in a predetermined area of memory 51 such as a scratch pad memory The calling party may enter the teleph
39. r entry review mode on Display 125 also contains a TX indicator light and an RX indicator light which show when RPU 111 is sending data to radiotelephone 10 and receiving data from radiotelephone 10 respectively RPU 111 has a cradle 180 in which radiotelephone 10 is placed for on site programming It will be appreciated from the above that radiotele phone 10 is remotely programmable and operable to receive and store numbers for the user to call as well as for automatically initiating the placement of these num bers Furthermore by using the proper access codes and passwords the status lock AutoAnswer Off and other operating parameters may be remotely grammed and controlled The use of the access codes or passwords prevents unauthorized persons from interfer ing with the programming and operation of radiotele phone 10 It will be appreciated from the description above that the user s secretary may send desired tele phone numbers and instructions to radiotelephone 10 so that the user is neither required to manually key in the telephone number or even a corresponding speed dial bin number Radiotelephone 10 also provides for the automatic initiation of dialing of stored telephone num bers and for the manual initiation of the dialing It will be appreciated from the above that the present invention is a radiotelephone which can be remotely programmed and controlled using standard tones and which provides for t
40. th requested information in the format INFOR MATION The number of digits in the INFOR MATION field will depend upon the function being performed The dealer commands are listed in the table and each command must be proceeded by D A and followed by Dealer Commands Functions Function 1 Speed Dial Memory Clear 2 Reset to default value user programmable functions such as volume level of ringer type of ringing tone display selection etc Read Number Activation Module NAM information where N equals 1 5 for each NAM and Y equals 1 9 for each parameter Write NAM information where N equals 1 5 for each NAM X equals 1 for a telephone number and X equals 2 for a System Identification Number SID and I equals up to 10 digits for a telephone number and 1 equals 5 digits for a SID 5 Reset dealer password to default password This function is accessible only if the master password was used for access 6 Read Call Restriction Level such as no restriction no incoming calls no outgoing calls from keypad outgoing call from speed dial memory only no long distance calls local 800 or 0 only etc Write Call Restriction Level where Z equals a 4 digit call restriction code 8 Read multiple NAM programming Write multiple NAM programming where M equals 0 5 for the multiple NAM setting such as multiple NAM with automatic NAM selection NAM 1 only NAM 2 only etc 0 Read A B System Setting suc
41. urned off The user may unlock radiotelephone 10 by entering the UNLOCK code using keypad 56 In the preferred embodiment the dealer s office 107 contains a least a standard DTMF telephone 109 con nected by line 110 to a remote programming unit RPU 5 276 729 11 111 which is connected by telephone link 112 to tele phone office 103 RPU 111 as described in more detail below can send and received DTMF tones 0 9 A D and display codes sent to or received from radio telephone 10 For remote programming the dealer and the user of radiotelephone 10 will establish contact The dealer can using either telephone 109 or RPU 111 perform the same functions as the user s secretary In addition the dealer can using RPU 111 perform other functions as described below In the preferred embodi ment to allow access to dealer functions the dealer will send the Service Command D Radiotelephone 10 will then send its electronic serial number ESN to RPU 111 The ESN can be used to determine the autho rized operating parameters of radiotelephone 10 and also whether radiotelephone 10 has been reported to be a stolen unit In response to the Service Command ra diotelephone 10 will via display 57 advise the user to enter the PROGRAMMING ACCESS code using control keypad 56 and then press the STORE key In the preferred embodiment the PROGRAMMING AC CESS code is a 9 digit code such as the user s social security number or dr
42. when radiotelephone 10 is inserted into the cradle 62 of VAU 60 VAU 60 also has a power switch not shown and via plug 61 pro vides operating power to radiotelephone 10 when ra diotelephone 10 is installed in cradle 62 Controller 50 controls the operation of and or receives status infor mation from voice synthesizer 63 message player 64 hybrid and interface circuit 65 handsfree microphone 70 and handsfree speaker 71 via signal path 47 jack 48 plug 61 and signal path 47 Message player 64 voice synthesizer 63 hybrid and interface circuit 65 and handsfree microphone 70 send voice and other analog signals to transmitter signal processing circuits 32 via signal path 37B plug 61 jack 48 and signal path 37B Similarly receiver signal processing circuit 30 sends voice and other analog signals to hybrid and interface circuit 65 and handsfree speaker 71 via signal path 33B jack 48 plug 61 and signal path 33B Duplexer 22 is connected by signal paths 26 and 26 jack 48 and plug 61 to connector 72 whereby radiotelephone 10 is switched from antenna 21 to a mobile antenna not shown installed on the vehicle in which VAU 60 is installed Hybrid and interface circuit 65 and RJ 11 jack 66 provide for the connection of an auxiliary device not shown such as an answering machine a facsimile ma chine or a modem so that the auxiliary device can be used and in the Data AutoAnswer mode can answer an incoming call When in t
43. xer 22 a re ceiver front end and demodulator 23 and a transmitter 24 all of which are conventional in design Duplexer 22 couples energy from transmitter 24 to an antenna such as antenna 21 and couples received signals from an antenna such as antenna 21 to receiver front end and demodulator 23 Receiver front end and demodulator 23 tunes into the selected RF channel amplifies the received signal and demodulates the received signal to 5 276 729 5 recover the information contained in the modulated signal This information is then provided to the receiver signal processing circuits 30 in audio section 12 The particular channel to which receiver front end and de modulator 23 is tuned is determined by control signals provided by control section 13 over signal path 25 The transmitter signal processing circuits 32 of audio section 12 provides information to transmitter 24 Transmitter 24 contains an oscillator a modulator and a power amplifier The particular RF channel on which trans 24 transmits the outgoing signal is controlled by contro signals provided by control section 13 over signal path 25 Frequency modulation FM is the form of modulation conventionally used for radiotelephones Audio section 12 contains receiver signal processing circuits 30 a dual tone multiple frequency DTMF converter 31 transmitter signal processing circuits 32 and a tone generator 40 which also generates DTMF tones Receiver signa
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