co (3 a)
Contents
1. g FIG 2C UNLOCK TRANSCEIVER AND STOP FLASHING RED LED 662 FLASH GREEN LED AND GENERATE ONE BEEP 5 247 565 1 CELLULAR TELEPHONE WITH KEYPAD CONTROLLER RELATED APPLICATIONS The present invention is a continuation in part appli cation based on copending U S patent application Ser No 07 622 201 filed Nov 27 1990 now U S Pat No 5 117 450 issued on May 26 1992 assigned to the instant assignee and incorporated herein by reference U S patent application Ser No 07 622 201 is a continuation based on the instant assignee s U S patent application Ser No 07 369 419 filed Jun 20 1989 and now aban doned which in turn is a continuation in part applica tion based on the instant assignee s U S patent applica tion Ser No 07 349 619 filed May 10 1989 and now abandoned BACKGROUND OF THE INVENTION The present invention is generally related to radio telephones and more particularly to a cellular tele phone with a keypad controller Cellular telephones currently are operated with a special purpose handset having an integrated display keypad microphone and speaker that is coupled via audio and data buses to a cellular telephone transceiver Such special purpose handsets may not be miniaturized due to the integrated display keypad microphone and speaker and their associated control circuitry In order to avoid use of a cellular radio channel during dialing and minimize costs of cellular2. 4 5 247 565 Sep 21 1993 U S Patent Pes NVOUS z G 675 AYONIN MU HLIM 3DAYIS qtos T 90s 431ndN02032IM u3AI39SNYU1 0IQVM AJOMNIM HLIM 60S 616 JILNAMOIOSIIAN 2 bos LINDA 21 oianv ZS 20S O SYS rG WS U S Patent Sep 21 1993 Sheet 2 of 4 5 247 565 oe 706 KEYS FRESSED ENABLE RINGER ES 606 TURN POWER ON AND NO TURN GREEN LED ON a ES 710 GENERATE DIAL TONE 608 CONNECT CALL 610 MEM END YES PRESSED TURN POWER OFF 612 0 MEM T ot ves 614 PRESSED RETURN NO g 618 MEM 5 YES PRESSED No m s 620 MEM 0 YES har um N RECALL NUMBER FROM SCRATCH PAD AND 622 0 624 DIGIT GENERATE BEEP PRESSED ES A 2A y FIG U S Patent Sep 21 1993 Sheet 3 of 4 5 247 565 STORE DIGIT AND RESET 4 SEC TIMER FIG 2B DIGIT NO ONE OR 536 TWO DIGITS 634 END KEY PRESSED YES 63 RECALL NUMBER yl FROM LOCATION XX PLACE THE CALL 640 DIGIT 668 PRESSED ee DTMF TONER 644 MEM MEM XX PRESSED STORE DIGITS IN LOCATION XX U S Patent Sep 21 1993 Sheet 4 of 4 5 247 565 U 674 LOCK TRANSCEIVER AND FLASH RED LED 646 MEM MEN NO PRESSED GENERATE SWITCH HOOK FLASH 650 MEM OR NO utu d PRESSED ADJUST HANDS FREE VOLUME UP OR DOWNE 654 MEM 6 YES PRESSED NO A 656 NO MEM 6 PRESSED NO YES 666 STOP FLASHING GREE E YES LED AND GENERATE TWO BEEPS END THE CALL 660
3. cording to a feature of the present invention the hook switch flash mode is entered where a hookswitch flash is generated in response to concurrent activation of the MEM MEM key sequence during a call From block 648 and NO branch of decision block 646 program control proceeds to decision block 650 where a check is made to determine if a MEM or a MEM key sequence has been pressed If so YES branch is taken to block 652 where microcomputer 508 changes the vol ume of speaker 544 up a predetermined amount for MEM key sequence or down predetermined amount for a MEM key sequence According to a feature of the present invention the speaker volume adjust mode is entered where the volume of speaker 544 is adjusted up or down in response to concurrent activation of the MEM or MEM key sequence respectively during a call From block 652 and NO branch of decision block 650 in FIG 2C program control proceeds to decision block 654 where a check is made to determine if a MEM 6 key sequence has been pressed If so YES branch is taken back to block 662 where microcomputer 508 flashes the green LED indicator 507 mutes the micro phone audio and generates a beep in speaker 544 to advise the user According to a feature of the present invention the call privacy mode is entered where audio from microphone 545 is muted for privacy in response to concurrent activation of the MEM 6 key sequence during a call Next at decision block 664 in
4. key sequence has not been pressed NO branch is taken to decision block 620 where a check is made to determine if a MEM 0 key sequence has been pressed If so YES branch is taken to block 622 microcomputer 508 recalls the last dialed telephone number from the scratch pad location in its memory and generates a beep in speaker 544 to advise the user According to a feature of the present invention the telephone number re dial mode is entered where the last dialed telephone number is re dialed in response to concurrent activation of the MEM 0 key sequence Thereafter program control exits at point E to proceed to block 640 and continue as 5 247 565 5 described hereinbelow If a MEM 0 key sequence has not been pressed NO branch is taken from decision block 620 to decision block 624 where a check is made to determine if a numerical key has been pressed If not NO branch is taken to decision block 610 to repeat the foregoing process If a numerical key has been pressed YES branch is is taken from decision block 624 in FIG 2A to exit point C to FIG 2B where at block 626 microcomputer 508 stores the digit associated with the activated key in its memory and resets a four second timer Next at deci sion block 626 in FIG 2B a check is made to determine if another numerical key has been pressed If so YES branch is taken back to block 626 to store the associated digit in the memory of microcomputer 508 and reset the timer If another
5. keys and concur rent activations of predetermined key sequences to receive telephone number digits and to select a corresponding one of the operating modes respec tively the predetermined key sequences including the memory key and another key storing each received telephone number digit in the memory automatically transmitting all of the stored telephone number digits on one of the cellular radio channels when the elapsed time from detection of the last activated key exceeds a predetermined time inter val to originate a telephone call and ending a telephone call when activation of the end key is detected i 12 The method according to claim 11 further includ ing the step of enabling an indicator during the power on mode 15 20 25 30 35 45 50 55 65 10 13 The method according to claim 12 further includ ing the step of detecting concurrent activation of the memory and the end key to select a power down mode said method including the step of removing power from said cellular transceiver when the power down mode is selected 14 The method according to claim 11 wherein the predetermined key sequences include a memory key followed by a first predetermined numerical key for selecting a re dial mode said method further including the step of re transmitting the previously transmitted telephone number digits when the re dial mode is se lected 15 The method according to claim 11 wherein the predetermi
6. modes and communicating cellular telephone calls on the cellular radio channels a controller having a plural ity of keys including ten numerical keys for entering telephone numbers and including a memory key for controlling the operating modes of the radiotelephone a second microcomputer including a memory and cou pled to the controller for detecting activations of indiv dual keys to receive telephone number digits and con current activations of predetermined key sequences to 20 25 30 35 40 45 50 55 60 65 2 select a corresponding one of the operating modes respectively the predetermined key sequences includ ing the memory key and another key the second mi crocomputer storing each received digit in the memory and the second microcomputer further being coupled to the first port of the data bus for automatically transmit ting the stored digits or the selected one of the operat ing modes to the cellular transceiver when the elapsed time from detection of the last activated key exceeds a predetermined time interval and the first microcom puter coupled to the second port of the data bus for receiving the transmitted one of the operating modes and applying the received operating mode to the cellu lar transceiver and receiving the transmitted digits and automatically transmitting the received digits on one of the cellular radio channels to originate a telephone call whereby all dialed digits of each teleph
7. 20 25 30 35 40 45 50 55 65 4 response to concurrent activation of any two keys Next at block 608 a dial tone is generated by mi crocomputer 508 and applied to speaker 544 Proceeding to decision block 610 in FIG 2A a check is made to determine if a MEM END key sequence has been pressed If so YES branch is taken to block 612 where microcomputer 508 turns power off and thereaf ter program control returns to other tasks at block 614 According to a feature of the present invention power is turned on in response to concurrent activation of the MEM END key sequence If a MEM END key se quence has not been pressed NO branch is taken from decision block 610 to decision block 616 where a check is made to determine if a MEM key sequence has been pressed According to a feature of the present invention the telephone number store mode is entered in response to concurrent activation of the MEM key sequence If the MEM key sequence has been pressed YES branch is taken from decision block 616 to exit point G to FIG 2D where at block 668 mi crocomputer 508 receives each activated key as digits of a telephone number Next at decision block 670 in FIG 2D a chick is made to determine if a MEM MEM XX key sequence has been pressed where XX represents two numerical keys 0 9 If not NO branch is taken back to block 668 to receive another digit If a MEM MEM XX key sequence has been pressed YES branch is ta
8. 502 of cellular telephone 500 couples speaker 544 to the radio receiver of and microphone 545 to the radio transmitter of radio transceiver 519 Microphone 545 is preferably disposed behind grill type openings 543 in controller 504 Speaker 544 is not dis posed in controller 504 Since controller 504 does not include a display or speaker 544 controller 504 is smaller and less complex than prior art telephone type handsets Microcomputer 508 of cellular telephone 500 is cou pled to numerical keys 0 9 and and to function keys MEM and END CLEAR in controller 504 as well as to LED indicators 506 and 507 and their corresponding resistors 532 and 533 LED indicator 506 is lit in white color to indicate that cellular telephone 500 is in a ROAM operating mode and LED indicator 507 is lit in red color to indicate that cellular telephone 500 is in the NO SERVICE operating mode or is lit in green color 5 247 565 3 to indicate that cellular telephone 500 is in the POWER ON and HOME operating modes LED indicator 506 is preferably positioned in opening 542 in controller 504 and LED indicator 507 is preferably positioned in open ing 541 in controller 504 Cellular telephone transceiver 509 includes a radio transceiver 519 and microcomputer 529 with memory therein for controlling the operation thereof Cellular telephone transceiver 509 may be any conventional cellular telephone transceiver having a radio transmit ter radio receiver and lo
9. FIG 2C a check is made to determine if a MEM 6 key sequence has been pressed again If not NO branch is taken to wait If a MEM 6 key sequence has been pressed again YES branch is taken to block 666 where where mi crocomputer 508 stops flashing the green LED indica tor 507 unmutes the microphone audio and generates two beeps in speaker 544 to advise the user From block 666 and NO branch of decision block 654 in FIG 2C program control proceeds to decision block 656 where a check is made to determine if the END key has been pressed If not NO branch is taken to decision block 658 where a check is made to determine if an END command has been received by cellular telephone transceiver 509 If not NO branch is taken to exits at point F to return to decision block 642 and continue as described hereinabove If the END key has been pressed or if an END command has been received by cellular telephone transceiver 509 YES branch is taken from decision blocks 656 or 658 respectively to block 660 to end the current call Thereafter program control exits at point B to return to block 608 and con tinue as described hereinabove Referring next to FIG 3 there is illustrated a flow chart for the process used by microcomputer 508 in FIG 1 for processing incoming telephone calls Enter ing at START block 702 the process proceeds to deci sion block 704 where a check is made to determine if an incoming call has been received If not NO bra
10. United States Patent 15 Joglekar et al 54 75 73 21 22 63 51 52 58 56 CELLULAR TELEPHONE WITH KEYPAD CONTROLLER Inventors Manohar A Joglekar Long Grove Philip F Aseltine Arlington Heights both of Ill Assignee Motorola Inc Schaumburg Ill Appl No 779 787 Filed Oct 21 1991 Related U S Application Data Continuation in part of Ser No 622 201 Nov 27 1990 Pat No 5 117 450 which is a continuation of Ser No 369 419 Jun 20 1989 abandoned which is a continuation in part of Ser No 349 619 May 10 1989 abandoned Units CL e Q H04M 11 00 US Cl iso ii 379 58 379 63 379 355 Field of Search 579 58 59 60 61 579 63 355 356 References Cited U S PATENT DOCUMENTS 4 658 096 4 1987 West Jr sss 379 59 4 718 080 1 1988 Serrano et al wwe 379 59 4 737 975 4 1988 Shafer wee 379 58 4 745 632 5 1988 Duffy 379 58 4 775 997 10 1988 West Jr 379 58 4 972 459 11 1990 Toki et al 379 58 5 086 452 2 1992 Ito et al see 379 58 5 117 450 5 1992 Joglekar et al wee 379 59 X 5 148 471 9 1992 Metroka et al esseere 379 58 MICROCOMPUTER WITH MEMORY US005247565A 1 Patent Number 5 247 565 4 Date of Patent Sep 21 1993 OTHER PUBLICATIONS Motorola Instruction Manual No 1S SP134682 Motorola Instruction Manual No 68P81071E30 The Celjack Owners Manual by Telular Inc Description and Spec
11. acing a cellular telephone call Key sequences of two or more concurrently acti vated function keys and or numerical keys are also detected by microcomputer 508 for selecting operating modes of cellular telephone 500 The detected key se quences are coded into corresponding commands and transmitted via bus 511 to microcomputer 529 The operating modes of cellular telephone 500 include the power on mode power off mode telephone number re dial mode telephone number re call mode tele phone number store mode lock mode DTMF mode hookswitch flash mode speaker volume adjust mode and call privacy mode Referring next to FIG 2 comprised of FIGS 2A 2B 2C 2D and 2E there is illustrated a flow chart for the process used by microcomputer 508 in FIG 1 for control and operation of cellular telephone 500 in re sponse to the MEM key END CLEAR key and nu merical keys of controller 504 Entering at START block 602 in FIG 2A the process proceeds to decision block 604 where a check is made to determine if any two keys of controller 504 have been pressed If not NO branch is taken to wait If two keys of controller 504 have been pressed YES branch is taken from deci sion block 604 to block 606 where microcomputer 508 turns power on to cellular transceiver 519 and lights the green LED indicator 507 According to a feature of the present invention the power on mode is entered where the power is turned on to cellular transceiver 519 in
12. beep in speaker 544 to advise the user According to a feature of the present invention the telephone number re call mode is entered where one or two digit numbers cause telephone num bers stored at locations 1 99 to be speed dialed Next at block 640 microcomputer 508 places a telephone call to the dialed or recalled telephone number At this point the telephone number digits accumulated in the mem ory of microcomputer 508 or the recalled digits are coded and transmitted together with a SEND code by microcomputer 508 via bus 511 to microcomputer 529 where they are encoded and transmitted via the cellular radio channels by means of the radio transmitter of radio transceiver 519 for placing a cellular telephone call Then at decision block 642 a check is made to determine if another digit has been dialed If so YES branch is is taken to block 644 where microcomputer 508 generates the DTMF tone corresponding to the dialed digit According to the feature of the present invention the DTMF mode is entered where DTMF tones are generated in response to each digit dialed during a call From block 644 and NO branch of decision block 642 in FIG 2B program control exits at point D to FIG 2C where at decision block 646 a check is made to 20 25 30 40 45 55 60 65 6 determine if a MEM MEM key sequence has been pressed If so YES branch is taken to block 648 where microcomputer 508 generates a hook switch flash Ac
13. ellular radio channels and cellular telephone apparatus comprising a data bus having first and second ports a transceiver including a first microcomputer for controlling the operating modes and communicat ing cellular telephone calls on the cellular radio channels a controller having a plurality of keys including ten numerical keys for entering telephone numbers and including a memory key for controlling the operat ing modes of the cellular telephone apparatus a second microcomputer including a memory and being coupled to the controller for detecting acti vations of individual keys to receive telephone number digits and for detecting concurrent activa tions of predetermined key sequences to select a corresponding one of the operating modes the predetermined key sequences including the mem ory key and another key said second microcom puter storing each received digit in the memory and said second microcomputer further being cou pled to the first port of said data bus for automati cally transmitting the stored digits or the selected one of the operating modes to the cellular trans ceiver when the elapsed time from detection of the last activated key exceeds a predetermined time interval and said first microcomputer coupled to the second port of said data bus for receiving the selected one of the Operating modes and applying the received operat ing mode to the cellular transceiver and receiving the transmitted digits and au
14. gic unit such as for example the conventional transceiver shown and described in Motorola instruction manual number 68P81066E40 entitled DYNATAC Cellular Mobile Telephone 800 MHZ Transceiver published by and available from Motorola C E Parts 1313 East Algonquin Road Schaumburg Ill 60196 The operating modes of such conventional transceiver are described in Motorola user s manual number 68P81116E58 entitled DYNA TAC 6800XL Cellular Mobile Telephone USER S MANUAL published by and available from Motorola C amp E Parts 1313 East Algonquin Road Schaumburg Ill 60196 In the preferred embodiment microcomputer 529 of cellular telephone transceiver 509 is coupled to mi crocomputer 508 by way of a three wire data bus 511 which is illustrated and described in U S Pat No 4 369 516 Microcomputer 508 continuously looks for activated numerical and functions keys of controller 504 Each telephone number digit corresponding to an activated numerical key is detected and accumulated by microcomputer 508 in its memory After a pause of four seconds the accumulated digits are coded as described in the aforementioned U S Pat No 4 369 516 and trans mitted by microcomputer 508 together with a SEND command via bus 511 to microcomputer 529 Mi crocomputer 529 receives the dialed digits from bus 511 and encodes and transmits them via the cellular radio channels by means of the radio transmitter of radio transceiver 519 for pl
15. ification GNTA Payphone Type AY4 NMT for Connection to a Mobile Radiostation in Accordance with the Specifications for the Nordic Mobile Telephone Systems NMT Primary Examiner James L Dwyer Assistant Examiner M Shehata Attorney Agent or Firm Kenneth W Bolvin 57 ABSTRACT A unique cellular telephone 500 includes audio circuit 502 microcomputer 508 indicators 506 and 507 cellular telephone transceiver 519 and keypad con troller 504 for controlling the operating modes thereof and automatically placing and receiving cellular tele phone calls dialed in any pattern The keypad includes numerical keys 0 9 and and function keys MEM and END CLEAR for entering digits of telephone number and key sequences for selecting operating modes Power is applied to the cellular telephone trans ceiver 519 in response to concurrent activation of at least two keys Each telephone number digit is detected and accumulated by microcomputer 508 and after a pause of four seconds the accumulated digits are sent via a data bus 511 to cellular telephone transceiver 519 for placing a telephone call The call is subse quently terminated when the END key is activated or an END command is received by the cellular telephone transceiver 519 Thereafter power to the cellular telephone transceiver 519 may be turned off in re sponse to activation of the MEM END key sequence 15 Claims 4 Drawing Sheets Sheet 1 of
16. ken from decision block 670 to block 672 where the previously received digits are stored as a telephone number in the memory of microcomputer 508 at location XX Thereafter program control exits at point B to return to block 608 and continue as described hereinabove Returning to decision block 616 in FIG 2A if a MEM f key sequence has not been pressed NO branch is taken to decision block 618 where a check is made to determine if a MEM 5 key sequence has been pressed If so YES branch is is taken to exit point H to FIG 2E where at block 674 microcomputer 508 electronically locks cellular telephone transceiver 509 and flashes red LED indicator 506 According to a feature of the pres ent invention the lock mode is entered where cellular telephone transceiver 509 is electronically locked in response to concurrent activation of the MEM 5 key sequence Next at decision block 676 in FIG 2E a check is made to determine if a three key unlock se quence has been pressed If not NO branch is taken back to block 674 to continue flashing red LED indica tor 506 If the proper three key unlock sequence has been pressed YES branch is taken to block 678 where microcomputer 508 electronically unlocks cellular tele phone transceiver 509 and stops flashing red LED indi cator 506 Thereafter program control exits at point B to return to block 608 and continue as described herein above Returning to decision block 618 in FIG 2A if a MEM 5
17. nch is taken to wait If an incoming call has been received YES branch is taken from decision block 704 to block 706 where microcomputer 508 generates a an elec tronic ringing signal 116 which is applied to speaker 544 Next at decision block 708 a check of the keys of controller 504 is made to determine if any key has been pressed If not NO branch is taken to wait According to a feature of the present invention an incoming call is 5 247 565 7 answered in response to activation of any key If a key of controller 504 has been pressed YES branch is taken from decision block 708 to block 710 to connect the call and thereafter proceed to entry point F in FIG 2B to continue as described hereinabove In summary a unique cellular telephone includes a keypad controller for controlling the operating modes thereof and automatically placing and receiving cellular telephone calls dialed in any pattern The novel keypad controller includes numerical keys 0 9 and and function keys MEM and END CLEAR and does not require an information display as in prior art cellular telephone handsets The dialed digits of a telephone number are stored and automatically transmitted in response to a four second pause by the unique cellular telephone of the present invention for placement of a cellular telephone cali without using a SEND button We claim 1 Cellular telephone apparatus having a plurality of operating modes and being operable on c
18. ned key sequences include a memory key followed by a second predetermined numerical key for selecting the lock mode said method further including the step of electronically locking the cellular trans ceiver when the lock mode is selected
19. numerical key has not been pressed NO branch is taken from decision block 630 to decision block 632 where a check is made to determine if four second timer has timed out If not NO branch is taken to decision block 634 where a check is made to deter mine if the END key has been pressed If so YES branch is taken to exit at point B to return to block 608 and continue as described hereinabove If the END key has not been pressed NO branch is taken from decision block 634 back to decision block 630 to continue as described hereinabove i In other embodiments rather than store each digit at block 626 microcomputer 508 may instead code each digit immediately after detection and transmit the coded digit via bus 511 to microcomputer 529 where the re ceived digits may be accumulated and automatically transmitted on the cellular radio channels four seconds after receipt of the last digit This operation is illustrated and described in the instant assignee s aforementioned U S patent application Ser No 07 622 201 filed Nov 27 1990 Returning to decision block 632 in FIG 2B if the four second timer has timed out YES branch is taken to decision block 636 where a check is made to determine if only one or two digits have been dialed except for zero which accesses the operator If so YES branch is is taken to block 638 where microcomputer 508 re calls the telephone number from the location X or XX in its memory and generates a
20. one number are automatically transmitted when dialing is interrupted for at least the predetermined time interval BRIEF DESCRIPTION OF THE DRAWINGS FIG 1 is a block diagram of another cellular tele phone 500 embodying the present invention into which a keypad controller 504 may be plugged FIG 2 comprised of FIGS 2A 2B 2C 2D and 2E is a flow chart for the process used by microcomputer 508 in FIG 1 for control and operation of cellular tele phone 500 in response to the MEM key END CLEAR key and digit keys of controller 504 FIG 3 is a flow chart for the process used by mi crocomputer 508 in FIG 1 for processing incoming telephone calls DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG 1 there is illustrated a block dia gram of another cellular telephone 500 embodying the present invention into which a keypad controller 504 may be plugged Cellular telephone 500 includes audio circuit 502 microcomputer 508 indicators 506 and 507 and cellular telephone transceiver 509 Note however that cellular telephone 500 does not include an informa tion display as is typical of conventional cellular tele phones such as the cellular telephone By utilizing the present invention the need for an information display has been eliminated since cellular telephone 500 may be operated and controlled solely by utilizing controller 504 and its numerical keys 0 9 and and function keys MEM and END CLEAR Audio circuit
21. paratus according to claim 6 wherein said second microcomputer is respon sive for concurrent activation of any two keys for ap plying power to said cellular transceiver 8 The cellular telephone apparatus according to claim 7 wherein said cellular telephone further includes an indicator coupled to the second microcomputer for providing a visual indication when power is on 9 The cellular telephone apparatus according to claim 8 wherein said indicator is a light emitting diode 10 The cellular telephone apparatus according to claim 7 wherein said controller further includes an end key and said second microcomputer is responsive to concurrent activation of the memory key and the end key for removing power from said cellular transceiver 11 A method of operating a radiotelephone having a plurality of operating modes the radiotelephone includ ing a controller coupled by a microcomputer with a memory to a cellular transceiver the cellular trans ceiver being operable on cellular radio channels for communicating cellular telephone calls and the con troller including ten numerical keys for entering tele phone numbers and including a memory key and an end key for controlling the operating modes of the radio telephone said method comprising the steps of detecting concurrent activation of at least two keys to select a power on mode and applying power to said cellular transceiver 5 247 565 9 detecting activations of individual
22. s including ten numerical keys for entering telephone numbers and including a memory key for controlling the operat ing modes of the cellular telephone apparatus second microcomputer including a memory and being coupled to the controller for detecting acti vations of individual keys to receive telephone number digits and for detecting concurrent activa tions of predetermined key sequences to select a corresponding one of the operating modes the predetermined key sequences including the mem ory key and another key said second microcom puter validating and storing each received digit in the memory and said second microcomputer fur ther being coupled to the first port of said data bus for automatically transmitting the stored digits or the selected one of the operating modes to the cellular transceiver when the elapsed time from detection of the last activated key exceeds a prede termined time interval and said first microcomputer coupled to the second port of said data bus for receiving the selected one of the operating modes and applying the received operat ing mode to the cellular transceiver and receiving the transmitted digits and automatically transmit ting the received digits on one of the cellular radio channels to originate a telephone call whereby all dialed digits of each telephone number are auto matically transmitted when dialing is interrupted for at least the predetermined time interval 7 The cellular telephone ap
23. telephone calls cellular telephone users are required to dial a telephone number and then press a SEND button pre origination dial ing in order to place a cellular telephone call Pressing the SEND button causes the cellular telephone hand set to generate a SEND signal and append it to the dialed digits transmitted to the cellular telephone trans ceiver In contrast conventional landline telephones place telephone calls automatically after a pause in dial ing of several seconds Such special purpose handsets also provide many different user features requiring complex software and additional circuitry Thus such special purpose handsets are both relatively large due to the integrated keypad display microphone and speaker and relatively expensive due to the complex software and additional circuitry therein Moreover such special purpose handset does not operate like con ventional landline telephones For the foregoing rea sons there is a need for a cellular telephone with an inexpensive keypad controller which does not include a SEND button and integrated display SUMMARY OF THE INVENTION The present invention encompasses cellular tele phone apparatus having a plurality of operating modes and being operable on cellular radio channels the cellu lar telephone apparatus comprising a data bus having first and second ports a cellular transceiver including a first microcomputer for controlling the operating
24. tomatically transmit ting the received digits on one of the cellular radio channels to originate a telephone call whereby all dialed digits of each telephone number are auto matically transmitted when dialing is interrupted for at least the predetermined time interval 2 The cellular telephone apparatus according to claim 1 wherein said second microcomputer is respon sive for concurrent activation of any two keys for ap plying power to said cellular transceiver 3 The cellular telephone apparatus according to claim 2 wherein said cellular telephone further includes an indicator coupled to the second microcomputer for providing a visual indication when power is on 4 The cellular telephone apparatus according to claim 3 wherein said indicator is a light emitting diode 5 The cellular telephone apparatus according to claim 2 wherein said controller further includes and 15 20 25 30 35 45 50 55 65 8 end key and said second microcomputer is responsive to concurrent activation of the memory key and the end key for removing power from said cellular transceiver 6 Cellular telephone apparatus having a plurality of operating modes said cellular telephone apparatus com prising a data bus having first and second ports a cellular transceiver including a first microcomputer and being operable on the cellular radio channels for communicating cellular telephone calls a controller having a plurality of key
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