United States Patent c19J
`Gillig et al.
`
`[llJ Patent Number:
`[45] Date of Patent:
`
`4,989,230
`Jan. 29, 1991
`
`[75]
`
`[54] CELLULAR CORDLESS TELEPHONE
`Inventors: Steven F. pmig, Roselle; Glen E.
`Pederson, St. Charles, both of Ill.
`[73] Assignee: Motorola, Inc., Schaumburg, Ill.
`[21} Appl. No.: 249,041
`Sep. 23, 1988
`[22] Filed:
`Int. a.5 .......................... H04B 1/40; H04Q 7/04
`[51J
`[52] U.S. a .......................................... 379/59; 379/61
`[58} Field of Search ...................... 455/89, 73; 379/63,
`379/58, 59, 61
`
`[56]
`
`References Cited
`U.S. PA TENT DOCUMENTS
`3,955,140 5/1976 Stephens et al ....................... 455/89
`4,481,382 11/1984 Villa-Real ............................. 379/61
`l/1985 Morcerf et al ........................ 455/32
`4,491,966
`4,627,107 12/1986 Hohlfeld et al. ...................... 455/11
`4,659,878 4/1987 Dinkins ............................. 379/61 X
`4,677,655 6/1987 Hashimoto ............................ 379/61
`4,682,351 7/1987 Makino ................................. 379/62
`4,700,375 10/1987 Reed ..................................... 379/61
`4,706,274 11/1987 Baker et al ............................ 379/61
`4,741,019 4/1988 Takahashi ............................. 379/61
`4,745,632 5/1988 Duffy .................................... 379/58
`4,879,740 11/1989 Nagashima et al ................... 379/61
`
`FOREIGN PATENT DOCUMENTS
`58-204640 11/1983 Japan ..................................... 379/61
`63-181534 7/1988 Japan ..................................... 379/61
`WO89/04569 5/1989 PCT Int'! Appl .................... 379/59
`2162404 1/1986 United Kingdom .................. 379/59
`
`OTHER PUBLICATIONS
`"Britain Offers Digital Cordless Phone Service", by
`
`Roger Woolnough, Electronic Engineering Times,
`Dec. 14, 1987, p. 25.
`"Cordlessphone Model No. KX-T3000 EASA-(cid:173)
`PHONE", published by Panasonic Company Exhibit
`D.
`"DYNAT AC Cellular Mobile Telephone" published
`by Motorola,
`Inc.
`Instruction Manual No.
`68P81049E55.
`Primary Examiner-Keith E. George
`Attorney, Agent. or Firm-Rolland R. Hackbart
`ABSTRACT
`[57]
`A cellular cordless telephone (10) operates with both a
`cordless base station (180) and a cellular base station
`(190) and cellular control terminal (196). in one embodi(cid:173)
`ment (FIG. 2), a cellular cordless telephone (100) in(cid:173)
`cludes a cellular transceiver (120), antenna (128), key(cid:173)
`board (140), a display (180), handset (160), and mi(cid:173)
`crocomputer (130) together with a cordless transceiver
`(110) and antenna (118), all of which may be in a single
`housing. In another embodiment (FIG. 3), a cellular
`cordless telephone (200) includes a cellular telephone
`(220) and a cordless telephone transceiver (210) which
`may be a plugable module. Whenever cellular cordless
`telephone (10) is within range of cordless base station
`(180), telephone cans may be made over the cordless
`radio channel or transferred from the cellular radio
`channels to the cordless radio channel. If the cellular
`cordless telephone (10) thereafter moves out of range of
`the cordless base station (180), telephone calls may be
`made over the cellular radio channels or transferred
`from the cordless radio channel to one of the cellular
`telephone channels.
`
`20 Claims, 7 Drawing Sheets
`
`194
`
`CELLULAR
`BASE
`STATION
`
`190
`196
`
`CONTROL
`TERMINAL
`
`198
`
`TELCO
`
`182
`
`180
`
`CORDLESS
`BASE
`STATION
`
`118
`
`._TE_Lc_o .. ~ - - - - - - .
`189
`CELLULAR
`CORDLESS
`TELEPHONE
`
`10
`
`COMMUNITY
`CORDLESS
`BASE STATION
`
`188
`
`Ex.1012
`APPLE INC. / Page 1 of 14
`
`

`

`U.S. Patent
`
`Jan. 29, 1991
`
`Sheet 1 of 7
`
`4,989,230
`
`FIG.1
`
`194
`
`180 ______ ,
`
`182
`
`CORDLESS
`BASE
`STATION
`
`118
`.. TE_Lc_o .. ~ - - - - - - -
`CELLULAR
`189
`CORDLESS
`TELEPHONE
`
`10
`
`COMMUNITY
`CORDLESS
`BASE STATION
`
`188
`
`CELLULAR
`BASE
`STATION
`
`190
`196
`
`CONTROL
`TERMINAL
`
`198
`
`TELCO
`
`110(210) \
`
`RECEIVE
`AUDIO
`120(22~ ~&~1~ 0---+-+=8=2---+-~
`
`RECEIVEa-----A-1----~
`AUDIO
`
`FIG.9
`;7
`r---159-
`I
`1
`-AMPLIFlER
`I
`I A2
`151 A .,_J
`152 I
`~ 150(250)
`153 . I
`154 B I
`
`162(262)
`
`164(264)
`
`----1
`
`lRANSMIT
`. AUDIO o---+-+=8~1-+ - -~ ~-+=--
`SELECT 2 o--.....
`UNK0--.,_----1r,,_..,
`1
`SELECT 1
`
`'-----
`
`J
`
`1-
`
`Ex.1012
`APPLE INC. / Page 2 of 14
`
`

`

`0
`N w
`\,0
`00
`~ \,0
`~
`
`~.
`
`ti)
`ti)
`00
`
`....:a
`...,
`0
`N
`....
`=-
`
`~
`~
`~
`~
`
`~~
`N
`.
`~
`~
`
`=
`.....
`tD
`.....
`~
`"'C
`•
`rJJ.
`•
`c::
`
`FIG.2
`
`100
`
`~._.J
`I
`I
`, a2 I
`r-=__L•
`
`1641
`
`160
`
`187
`
`I
`
`119
`
`HIGH PASS
`
`FILTER
`
`LOW PASS
`
`FILTER
`
`185
`
`Al
`SWITCH 8
`AUDIO A
`82
`
`A2.
`
`81
`
`MICROCOMPUTER
`
`150
`
`130
`
`--------
`
`118
`
`112
`
`110
`
`a::
`~ X
`<
`c(
`:::,
`:::,
`a a
`0
`0
`
`~
`146 w
`I
`
`~
`
`116
`
`CIRCUITRY
`
`AUDIO
`
`TRANSMITTER
`CORDLESS
`RECEIVER
`CORDl£SS
`
`;1~1~1i ~ ~
`a:: I c,; s
`I i ~ 114
`~ i
`
`~ ~
`en
`•
`Lil u
`
`en
`I
`
`w
`
`x er
`
`I
`.-
`
`1 1 1 1
`.---.-
`
`-
`
`000
`000
`000
`000
`
`I I
`
`140
`
`IIIIIIK:7
`
`180
`
`I..
`c,~gs~
`I I
`TRANSMITTER l l
`RECEIVER l I I r--r-1---
`
`TX ENABLE · _ I CELLULAR
`
`~ ~
`<
`~ :::,
`·O
`0
`
`,J: 'fi2a a a
`
`!
`~ 135
`
`a:
`><
`~ ~
`,!
`
`CELLULAR
`133
`
`120
`
`-
`
`RX ENABLE
`
`122
`
`131 -t J-132
`
`Ex.1012
`APPLE INC. / Page 3 of 14
`
`

`

`0
`CH
`~
`\C
`QC
`\C
`.s:,.
`
`~
`
`~
`
`(N a.
`~
`00 =(cid:173)~
`
`---1
`
`~
`
`\D ...
`.,.\D ... \D
`
`?
`~
`
`tD = f"'t,,
`f"'t-·
`~
`1-C
`•
`rJJ.
`c:: •
`
`200
`
`FIG.3
`
`i.-2·
`
`-
`
`,214
`
`RECEIVER
`CORDLESS
`
`\ v-218
`
`I
`
`TRANSMITTER
`CORDLESS ~212
`
`L ...... --~!!!G CEWJ~~~---L--!J
`I
`Cl Cl Cl
`240-Cl Cl Cl
`CIRCUITRY
`Cl Cl Cl ~ ~ AUDIO
`I
`71
`230
`Cl Cl Cl
`1 MICROCOMPUTER ¢: -----1'. CELLULAR
`-,
`I
`~ I I
`i
`I i
`i
`i
`i
`i
`I -----
`§
`. , ' , . , ,, ,, ,,
`.,, H, , , , ' , , , , ,
`
`'-Al 284JII
`,
`
`I
`
`TX 81 SWITCH B
`-A, AUDIO A
`RX
`
`A2 B2
`
`<~
`I L_
`I
`
`2eo7-
`
`2~0.
`
`~ ~
`
`228~/
`
`-
`
`,, , ,
`H w
`
`I
`-7
`
`.~2
`
`...
`228,
`...
`-~ RECENER
`224,
`-.,..-TRANSMITTER
`L.J\. CELLULAR
`.
`----!)I I I I I ·1 1 ~ 2ao
`
`...
`
`\
`
`220
`
`ii
`
`ii
`
`~ ~ DI
`
`'
`
`::,
`
`-
`
`272
`270
`
`Ex.1012
`APPLE INC. / Page 4 of 14
`
`

`

`.. ~ w
`~ .. \0
`
`\0
`00
`
`Q
`
`CONNECT >S CELLULAR
`
`CONNECT /IS CORDLESS
`
`416
`
`414
`
`~
`
`......
`0 '""
`tD ..
`00 =(cid:173) tD
`
`~ j,,M
`
`j,,M
`>4\C
`~
`
`~
`
`~
`
`""d a C'D = f'"t-
`~ • 00 •
`
`YES
`
`FIG.5
`
`IS CORDLESS
`CONNECT. OOJ..
`
`320
`
`308
`
`I YES<
`
`IS CEU.ULAR
`CONNECT CALI.
`◄
`
`'r£S1
`
`YES
`
`NO
`
`302
`
`DISPLAY AVAILABIUlY
`ACTIVATE ccr AND
`
`FIG.4
`
`Ex.1012
`APPLE INC. / Page 5 of 14
`
`

`

`U.S. Patent
`ACTIVATE CCT
`
`Jan. 29, 1991
`
`500
`
`NO
`
`NO
`
`Sheet 5 of 7
`
`4,989,230
`FIG.6
`
`YES
`
`512
`
`CONNECT /IS CEU.ULAR
`
`CONNECT IS CORDLESS
`
`51 O
`
`IGNORE CELLULAR PAGE
`AND WNT FOR CAil. TO
`BE RECEIVED
`ON CORDLESS
`
`518
`
`IGNORE CORDLESS PAGE
`AND WNT FOR CALI. TO
`BE RECEIVID
`ON CEU.UIAR
`
`524
`
`Ex.1012
`APPLE INC. / Page 6 of 14
`
`

`

`U.S. Patent
`
`Jan. 29, 1991
`
`Sheet 6 of 7
`
`4,989,230
`
`ACTIVATE CCT
`
`600
`
`ONE CALL IN PROCESS
`ON CELLULAR
`OR CORDLESS
`
`602
`
`FIG.7
`
`ALERT USER OF
`ALTERNATE SYSTEM 00.L
`
`610
`
`NO
`
`ENABLE 3 WAY LINKING
`CIRCUIT PROCESSING
`
`616
`
`PROCESS BOTii CALLS
`SIMULTANEOUS WllH
`SELECTION BEJWEEN
`lHEM MADE BY USER
`
`618
`
`Ex.1012
`APPLE INC. / Page 7 of 14
`
`

`

`U.S. Patent
`
`Jan. 29, 1991
`
`Sheet 7 of 7
`
`4,989,230
`
`ACTIVATE CCT
`
`OOJ. IN PROCESS
`
`700
`
`702
`
`FIG.B
`
`YES
`
`MAINTAIN Cal.ULAR
`OOJ.>S LONG >S
`· POSSIBL£
`
`720
`
`MAINTAIN CALL >S
`LONG >-S POSSIBLE
`
`7H-
`
`718
`
`712
`
`TRANSFER CORDLESS
`OOJ. TO CELLULAR
`
`TRANSFER CELLULAR
`OOJ. TO CORDLESS
`
`Ex.1012
`APPLE INC. / Page 8 of 14
`
`

`

`1
`
`CELLULAR CORDLESS TELEPHONE
`
`4,989,230
`
`2
`matically· transfering between a cellular telephone call
`and a cordless telephone call.
`FIG. 9 is a detail circuit diagram for audio switch 150
`in FIG. 2.
`
`5
`
`BACKGROUND OF THE INVENTION
`The present invention is generally related to cellular
`telephones and more particularly to an improved cellu(cid:173)
`lar cordless telephone for providing both cellular and
`cordless telephone services.
`In the prior art, cordless telephones typically are used 10
`in the home to allow the user to place and receive tele(cid:173)
`phone calls at any point throughout the house. Such
`cordless telephones are connected to the user's tele(cid:173)
`phone landline. However, due to their limited range,
`such cordless telephones are not suitable for use in vehi- 15
`cles. Vehicular communications are typically achieved
`by means of radio telephone systems, the most prevalent
`being cellular telephone systems. A cellular telephone
`allows the user to place and receive telephone calls at
`any point throughout a large metropolitan area. How- 20
`ever, the cost of a cellular telephone call is as much as
`seven times the cost of a cordless telephone call, since
`cordless telephone calls are made by way of the user's
`telephone landline and cost the same as landline tele(cid:173)
`phone calls, while cellular telephone calls are made by 25
`way of expensive cellular base stations and cellular
`switching equipment and cost much more than landline
`telephone calls.
`
`OBJECTS OF THE INVENTION
`Accordingly, it is an object of the present invention
`to provide an improved cellular cordless telephone that
`may place both cellular telephone calls and cordless
`telephone calls.
`It is another object of the present invention to pro- 35
`vide an improved cellular cordless telephone that auto(cid:173)
`matically operates as a cordless telephone whenever it
`is in range of its corresponding cordless base station.
`
`45
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 is a block diagram of a cellular cordless tele(cid:173)
`phone system embodying the present invention.
`FIG. 2 is a block diagram of a cellular cordless tele-
`phone embodying the present invention.
`FIG. 3 is a block diagram of another embodiment of
`a cellular cordless telephone according to the present
`invention.
`FIG. 4 is a flow chart for the process used by the
`cellular cordless telephones in FIGS. 2 and 3 for placing 50
`and receiving cellular and cordless telephone calls.
`FIG. 5 is a flow chart for the process used by the
`cellular cordless telephones in FIGS. 2 and 3 for origi(cid:173)
`nating a telephone call as a cellular telephone call or a
`cordless telephone call according to user selectable 55
`preference.
`FIG. 6 is a flow chart for the process used by the
`cellular cordless telephones in FIGS. 2 and 3 for receiv(cid:173)
`ing a telephone call as a cellular telephone call or a
`cordless telephone call according to user selectable 60
`preference.
`FIG. 7 is a flow chart for the process used by the
`cellular cordless telephones in FIGS. 2 and 3 for simul(cid:173)
`taneously processing both a cellular telephone call and
`a cordless telephone call and three-way linking both 65
`calls.
`FIG. 8 is a flow chart for the process used by the
`cellular cordless telephones in FIGS. 2 and 3 for auto-
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENT
`In FIG. 1, there is illustrated a block diagram of a
`cellular cordless telephone system embodying the pres(cid:173)
`ent invention. The system includes a telephone com(cid:173)
`pany phone system (TELCO) 184, connected by tele-
`phone landlines to a cordless base station 180 having a
`landline telephone number located in a home or office
`181 and to a community cordless base station 188 hav(cid:173)
`ing a landline telephone number in another office, build(cid:173)
`ing, or other geographical location. Cordless base sta-
`tions 180 and 188 communicate with the cellular cord(cid:173)
`less telephone (CCT) 10 through antennas 182 and 189.
`Antennas 182 and 189 may be implemented as telescop(cid:173)
`ing whip antennas. Cordless base stations 180 and 188
`may be any conventional cordless base station, such as,
`for example, the base station shown and described in
`Panasonic operating instructions, entitled "Cordless(cid:173)
`phone Model No. KX-T3000 EASA-PHONE", pub(cid:173)
`lished by and available from the Panasonic Company,
`One Panasonic Way, Secaucus, NJ, 07094. Additional
`community cordless base stations 188 may be located
`throughout a metropolitan area for providing shared
`telephone service to CCTs 10. In this case, cordless base
`30 station 188 may include additional equipment for billing
`calls to the cellular telephone number of CCT 10.
`Also connected through telephone landlines to the
`same or a different telephone company phone system
`(TELCO) 198 is the cellular control terminal 196 (see
`U.S. Pat. No. 4,268,722) with its associated cellular base
`station(s) 190 (see U.S. Pat. No. 4,485,486 incorporated
`herein by reference). Cellular base station 190 incorpo(cid:173)
`rates both a receive antenna 192 and a transmit antenna
`194 (see U.S. Pat. No. 4,369,520 incorporated herein by
`40 reference) for communicating with CCTs 10.
`CCT 10 may be a mobile unit installed in a vehicle, a
`transportable unit which is a mobile unit and battery
`installed in a carrying case, or a hand-held portable unit.
`CCT 10 includes an antenna 118 for the cordless radio
`channels and an antenna 128 for the cellular radio chan(cid:173)
`nels as illustrated by the embodiment of CCT 200 in
`FIG. 3, or may include a single antenna, is illustrated by
`the embodiment of CCT 100 in FIG. 2. In the U.S.A.,
`the cordless radio channels are in the frequency band
`from 46-49 mHz and the cellular radio channels are in
`the frequency band from 824-894 mHz.
`In FIG. 2, there is illustrated a detailed block diagram
`of a first embodiment of a CCT 100 according to the
`present invention. CCT 100 includes a cordless tele(cid:173)
`phone transceiver 110, antenna 118, cellular telephone
`transceiver 120, antenna 128,.microcomputer 130, key-
`pad 140, display 180, audio switch 150, and handset 160
`including speaker 162 and microphone 164. Alterna(cid:173)
`tively, as shown by dashed-lines in FIG. 2, cordless
`telephone transceiver 110 and cellular telephone trans(cid:173)
`ceiver 120 may be coupled to a single antenna 119 in
`place of antennas 118 and 128 by way of low-pass filter
`185 and high-pass filter 187, respectively. Cordless tele(cid:173)
`phone transceiver 110 may be any conventional cord(cid:173)
`less telephone transceiver, such as, for example the
`transceiver shown and described in the aforementioned
`Panasonic operating instructions, entitled "Cordless(cid:173)
`phone Model No. KX-T3000 EASA-PHONE". Cellu-
`
`Ex.1012
`APPLE INC. / Page 9 of 14
`
`

`

`4,989,230
`
`3
`Jar telephone transceiver 120, microcomputer 130, key(cid:173)
`pad 140, and handset 160 likewise may be any commer(cid:173)
`cially available cellular transceiver, such as, for exam(cid:173)
`ple, the transceiver shown and described in Motorola
`instruction manual number 68P81049E55, entitled 5
`"DYNATAC Cellular Mobile Telephone", published
`by and available from Motorola C & E Parts, 1313 East
`Algonquin Road, Schaumburg, IL 60196.
`Referring to FIG. 9, audio switch 150 may be imple(cid:173)
`mented with two-to-one multiplexing analog switches 10
`151-155 which select between audio signals of audio
`circuitry 116 in cordless transceiver 110 and audio cir(cid:173)
`cuitry 126 in cellular transceiver 120 under control of
`select signals SELECT!, SELECT2 and LINK from
`microcomputer 130. Select signal SELECT2 enables 15
`switches 151 and 152 when it has a binary one state,
`select signal SELECT! enables switches 153 and 154
`when it has a binary one state, and select signal LINK
`enables switches 152, 154 and 155 when it has a binary
`one state. Depending on which is enabled, analog 20
`switches 151 and 153 couple speaker 162 to receive
`audio from audio circuitry 116 and audio circuitry 126,
`respectively. Similarly, depending on which is enabled,
`analog switches 152 and 154 couple microphone 164 to
`transmit audio of audio circuitry 116 and audio circuitry 25
`126, respectively. If three-way linking is selected, ana(cid:173)
`log switches 152 and 154 couple microphone 164 to
`transmit audio of both audio circuitry 116 and audio
`circuitry 126, and analog switch 155 couples speaker
`162 to receive audio of both audio circuitry 116 and 30
`audio circuitry 126 by way of summing amplifier 159.
`Referring to CCT 100 in FIG. 2, microcomputer 130
`is programmed in accordance with FIGS; 4-8 for oper(cid:173)
`ating as a cellular telephone, a cordless telephone, or a
`cellular cordless telephone. That is, according to the 35
`present invention, CCT 100 may simultaneously oper(cid:173)
`ate as a cellular telephone and a cordless telephone.
`When operating as a cellular telephone, control signals
`131 TX ENABLE and 132 RX ENABLE. of mi(cid:173)
`crocomputer 130 enable cellular transmitter 124 and 40
`cellular receiver 122, respectively. In addition to con(cid:173)
`trol signals 131 and 132 to cellular transceiver 120,
`microcomputer 130 also monitors control signals 133
`RSSI, 134 RX DAT A and 135 TX DAT A for detecting
`signal strength, for detecting receive data and for send- 45
`ing transmit data, respectively, used in operation of·
`cellular transceiver 120. When operating as a cordless
`telephone, control signals 141 and 146 of microcom(cid:173)
`puter 130 enable cordless receiver 112 and cordless
`transmitter 114, respectively. In addition to control SO
`signals 141 and 146 to cordless transceiver 110, mi(cid:173)
`crocomputer 130 also monitors control signals 142 SIG(cid:173)
`NAL QUALITY, 143 RING, 144 RX SECURITY
`CODE and 145 TX SECURITY CODE for detecting
`signal strength, ringing, and the receive security code, 55
`and for sending the transmit security code and dialed
`digits, respectively, used in operation of cordless trans(cid:173)
`ceiver 110. Dialed digits may also be encoded by key(cid:173)
`pad 140 as conventional multi-frequency. tones which
`are coupled to transmit audio of cordless transceiver 60
`110 by audio switch 150 during cordless operation.
`Referring next to FIG. 3, there is illustrated a block
`diagram of another embodiment of a cellular cordless
`telephone (CCT) 200 according to the present inven(cid:173)
`tion. CCT 200 includes a cordless telephone transceiver 65
`210 in a separate housing with antenna 218 and connec(cid:173)
`tor 270, and a cellular telephone 220 in a separate hous(cid:173)
`ing with antenna 228 and connector 272. Cordless tele-
`
`4
`phone transceiver 210 may be a plug-in accessory
`which couples via connectors 270 and 272 to cellular
`telephone 220. When cordless telephone transceiver 210
`is plugged into microcomputer 230 of.cellular telephone
`220, it operates in accordance with FIGS. 4-8. Cellular
`telephone 220 includes cellular transmitter 222, cellular
`receiver 224, microcomputer 230, keypad 240, display
`280, audio circuitry 226, audio switch 250 and handset
`260 including speaker 262 and microphone 264. Cord(cid:173)
`less telephone transceiver 210 may be any conventional
`cordless telephone transceiver, such as, for example the
`transceiver shown and described in the aforementioned
`Panasonic operating instructions, entitled "Cordless(cid:173)
`phone Model No. KX-T3000 EASA-PHONE". Cellu(cid:173)
`lar telephone 220 likewise may be any commercially
`available cellular transceiver, such as, for example, the
`transceiver shown and described in the aforementioned
`Motorola instruction manual number 68P81049E55,
`entitled "DYNATAC Cellular Mobile Telephone".
`Microcomputer 230 of cellular telephone 220 is cou(cid:173)
`pled to the cordless telephone transceiver 210 via the
`same control signals used in FIG. 2. These control sig(cid:173)
`nals are TX/RX enable signals, signal quality signal,
`ring signal and TX/RX security code signals.
`Audio circuitry 226 of cellular telephone 220 is cou(cid:173)
`pled to audio switch 250 which can be implemented
`with two-to-one multiplexing analog switches (see FIG.
`9) which select between audio signals from the cellular
`receiver 224 and transmitter 222 and cordless telephone
`receiver 214 and transmitter 212.
`Referring now to FIG. 4, there is illustrated a flow
`chart for the process used by the CCTs 100 and 200 in
`FIGS. 2 and 3, respectively, for placing and receiving
`cellular and cordless telephone calls. Entering at block
`302, the user activates the CCT. The microcomputer
`130 and 230 monitors both the cellular and cordless
`systems for availability thereof and for incoming and
`outgoing calls. If the cellular system and/or cordless
`system are available, a corresponding availability indi(cid:173)
`cator is enabled in display 180 and 280. In cellular sys(cid:173)
`tems, the microcomputer scans pre-selected signalling
`channels to determine if cellular service is available.
`Next, at decision block 304, a check is made to deter(cid:173)
`mine if a call has been received. If not, NO branch is
`taken to decision block 316 to determine if a call has
`been initiated by the user ofthe·ccT. Ifnot, NO branch
`is taken back to block 304 to continue monitoring both
`the cellular and cordless systems for teleph_one calls.
`Returning to decision block 304, if an incoming call
`has been received, YES branch is taken to decision
`block 306 where a check is made to determine if the
`incoming call is a cellular call. If so, YES branch is
`taken to block 308 where a cellular call indicator is
`activated or entered in display 180 and 280, and the
`incoming call is connected as a cellular call (e.g., in
`FIG. 2, cellular transceiver 120 is enabled by mi(cid:173)
`crocomputer 130). If the incoming call is not a cellular
`call, NO branch is taken from block 306 to block 320
`where a cordless call indicator is activated or entered in
`display 180 and 280, and the incoming call is connected
`as a cordless call (e.g., in FIG. 2, cordless transceiver
`110 is enabled by microcomputer 130).
`Returning to decision block 316, if a call has been
`initiated by the user of the CCT, YES branch is taken to
`decision block 318 where a check is made to determine
`if the initiated call is a cellular call. If so, YES branch is
`taken to block 308 where the initiated call is connected
`as a cellular call. If the initiated call is not a cellular call,
`
`Ex.1012
`APPLE INC. / Page 10 of 14
`
`

`

`4,989,230
`
`5
`NO branch is taken from decision block 318 to block
`320 where the initiated call is connected as a cordless
`call.
`Referring now to FIG. 5, there is illustrated a flow
`chart for the process used by the CCTs 100 and 200 in 5
`FIGS. 2 and 3, respectively, for originating a telephone
`call as a cellular telephone call or a cordless telephone
`call according to user selectable preference.
`Entering at block 400, the user activates the CCT.
`Next, at block 402, a check is made to determine if a call 10
`has been originated by the CCT. If not, NO branch is
`taken to wait for a call to be originated. If a call has been
`originated, YES branch is taken from decision block
`402 to decision block 404, where a check is made to
`determine if the user's preference is for cordless phone 15
`operation. If not, NO branch is taken to block 406 to
`determine if a call can be placed on the cellular system.
`If so, YES branch is taken to block 416 where the call
`origination is connected as a cellular call. If not, NO
`branch is taken to decision block 408 to determine if a 20
`call can be successfully placed on the cordless system.
`Referring back to decision block 404, if preference is for
`cordless, YES branch is also taken to decision block
`408. If a cordless call can be successfully placed, YES
`branch is taken from decision block 408 to decision 25
`block 414 where the call is connected as a cordless call.
`If not, NO branch is taken to decision block 410 to
`determine if a call had been tried unsuccessfully on the
`cellular system. If so, YES branch is taken to block 402
`to wait for a call origination. If not, NO branch is taken 30
`to decision block 406 to determine if the call can be
`placed on the cellular system.
`Referring now to FIG. 6, there is illustrated a flow
`chart for the process used by the CCTs 100 and 200 in
`FIGS. 2 and 3, respectively, for receiving a telephone 35
`call as a cellular telephone call or a cordless telephone
`call according to user selectable preference.
`Entering at block 500, the user activates the CCT.
`Next, at ·decision block 502, a check is made to deter(cid:173)
`mine if a call is being received by the CCT. If not, NO 40
`branch is taken back to decision block 502. If a call has
`been received, YES branch is taken from decision block
`502 to decision block 504 to determine if the user's
`system preference matches the system of the incoming
`call. If so, YES branch is taken to decision block 508 to 45
`determine if the call is on the cordless system. If so, the
`YES branch is taken to block 510 where the incoming
`call is connected as a cordless call. If not, the NO
`branch is taken to block 512 where the incoming call is
`connected as a cellular call.
`Returning to decision block 504, if the user's system
`preference does not match the system of the incoming
`call, NO branch is taken to decision block 506 to deter(cid:173)
`mine if the preference is for the cordless system. If so,
`the YES branch is taken to decision block 514 to deter- 55
`mine if the CCT is within range of the cordless base
`station (e.g., by sending the transmit security code and
`waiting for the receive security code from the cordless
`base station). If not, the NO branch is taken to block 512
`where the incoming call is connected as a cellular call. 60
`If the cellular cordless telephone is within range of the
`cordless base station, YES branch is taken from decision
`block 514 to decision block 516 to determine if the
`cellular system will forward the unanswered incoming
`call to the landline of the cordless base station when the 65
`cellular phone cannot be reached. This type of service is
`generally referred to as "call forwarding" (a process
`which redirects a call from the dialed cellular telephone
`
`6
`number of CCT 10 to the landline telephone number of
`cordless base station 180) and can be determined by
`polling stored information in the memory associated
`with the CCT microcomputer. If not, NO branch is
`taken to block 512 where the incoming call is connected
`as a cellular call. If the cellular system will forward the
`unanswered incoming call, YES branch is taken from
`decision block 516 to block 518 where the cellular page
`from the cellular base station is ignored and thereafter
`to decision block 502 to wait for the incoming call to be
`received as a cordless call.
`Returning to decision block 506, if the preference is
`for a cellular call, NO branch is taken to decision block
`520 to determine if the CCT is within range of the cellu(cid:173)
`lar base stations (does it have cellular service). This is
`typically determined by scanning and selecting the
`strongest signalling channel from the surrounding cellu(cid:173)
`lar base stations. If not, NO branch is taken to block 510,
`where the incoming call is connected as a cordless call.
`If the CCT is within range of the cellular base stations,
`YES branch is taken from decision block 520 to decision
`block 522 to determine if the landline system will for(cid:173)
`ward the unanswered incoming call to the cellular sys(cid:173)
`tem. This type of service is generally referred to as "call
`forwarding" and can be determined by polling stored
`information in the memory associated with the CCT
`microcomputer. If not, NO branch is taken to block 510
`where the incoming call is connected as a cordless call.
`If the landline telephone system will forward the unan(cid:173)
`swered incoming call, YES branch is taken from deci(cid:173)
`sion block 522 to block 524 where the cordless page
`from the cordless base station is ignored and thereafter
`back to decision block 502 to wait for the incoming call
`to be received as a cellular call.
`Referring now to FIG: 7, there is illustrated a flow
`chart for the process used by the CCTs 100 and 200 in
`FIGS. 2 and 3, respectively, for simultaneously process(cid:173)
`ing both a cellular telephone call and a cordless tele(cid:173)
`phone call and, if desired, three-way linking both calls.
`Entering at block 600, the user activates the CCT.
`Next, at block 602, one call is assumed to be in process
`op. either the cellular system or cordless system. Pro(cid:173)
`ceeding from block 602 to decision block 604, a check is
`made to determine if a call has been received on the
`opposite system from the call in process. If so, YES
`branch is taken to decision block 608 to determine if the
`user has selected the dual-mode feature (e.g., by enter(cid:173)
`ing a predetermined code from the keypad). If not, NO
`branch is taken back to decision block 604 and the cur-
`50 rent call remains in process. If the user has selected the
`dual-mode feature, YES branch is taken from decision
`block 608 to block 610 which alerts the user of an in(cid:173)
`coming call on the alternate system. This type of service
`is generally referred to as "call waiting". Next, at deci(cid:173)
`sion block 612, a check is made to see if the user ac(cid:173)
`knowledges the second call. If not, NO branch is taken
`back to decision block 604 and the current call remains
`in process. If the user acknowledges the second call
`(e.g., by flashing the hookswitch), YES branch is taken
`from decision block 612 to decision block 614 to deter(cid:173)
`mine if the user has selected three-way linking ( e.g., by
`entering a predetermined code from the keypad). If so,
`YES branch is taken to block 616 which enables three(cid:173)
`way linking of the user and the two calls, each of which
`is on a different system. Three-way linking may be
`accomplished by switchably coupling the combined
`receive audio signals from summing amplifier 159 via
`analog gate 155 to the speaker, and enabling both trans-
`
`Ex.1012
`APPLE INC. / Page 11 of 14
`
`

`

`4,989,230
`
`7
`mit audio switches 152 and 154 in FIG. 9. If the user has
`not selected three-way linking, NO branch is taken from
`decision block 614 to block 618 to process both calls
`simultaneously, one over each system, but selection
`between them is made by the user so that only one party 5
`is in conversation with the user at a time. Selection
`between the calls may be made pressing a pre-selected
`key or set of keys on the keypad.
`Returning to decision block 604, if a call has not been
`received on the opposite system, NO branch is taken to 10
`decision block 606 to determine if a call has been origi(cid:173)
`nated on the opposite system. If not, NO branch is taken
`back to decision block 604. If a call has been originated
`on the opposite system, YES branch is taken from deci(cid:173)
`sion block 606 to decision block 614 to determine if the 15
`user wants three-way linking, as described hereinabove.
`Referring now to FIG. 8, there is illustrated a flow
`chart for the process used by the CCTs 100 and 200 in
`FIGS. 2 and 3, respectively, for automatically transfer(cid:173)
`ing between a cellular telephone call and a cordless 20
`telephone call.
`Entering at block 700, the user activates the CCT.
`Next at block 702, a call is assumed to be in process on
`one of the two systems. Proceeding from block 702 to
`decision block 704, a check is made to determine if the 25
`call in process is on the cordless system. If so, YES
`branch is taken to decision block 708 to determine if the
`CCT is still within range of the cordless base stations
`(e.g., signal quality is good). If so, YES branch is taken
`back to decision block 704. If the cellular cordless tele- 30
`phone is out of range of the cordless base stations, NO
`branch is taken from decision block 708 to decision
`block 710 to determine if the user has selected transfer
`of the cordless call to the cellular system (e.g., by enter(cid:173)
`ing a predetermined code from the keypad). If so, YES 35
`branch is taken to block 714 where an attempt is made
`to transfer the cordless call to the cellular system. As(cid:173)
`suming the called party has "call waiting", the transfer
`· is attempted by placing another call on the cellular
`system and waiting for the called party to answer. 40
`Thereafter, the path returns to decision block 704. If the
`user has not selected call transfer, NO branch is taken
`from decision block 710 to block 712 where the cordless
`call is maintained as long as possible.
`Returning to decision block 704, if the call is not on 45
`the cordless system, NO branch is taken to decision
`block 706to determine if the CCT is still within range of
`the cellular base stations (e.g., signal quality is good). If
`so, YES branch is taken back to decision block 704. If
`the CCT is out of range of the cellular base stations, NO 50
`branch is taken from decision block 706 to decision
`block 716 to determine if the user has selected transfer
`of the cellular call to the cordless system (e.g., b