Clnslncahon Sy•lem I
`
`U.S.
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`I '379/67,84,88,89,97,201,204,205,207,210,211,212,213,214
`I
`
`INTERNATIONAL SEARCH REPORT
`lnlemallonal Appllcatlon No. PCI'/US91/03469
`I. CLASSIFICATION OF SUBJECT MATTER (II Hvoral clat•lncallon 17mbol1 applJ, lndlcat• all) 1
`Accordino to lnternatronal Patent Clacalficatlon (IPC) or to both National Claulnc:atlon and IPC
`
`us 379/67
`IPC(5) H04M 3/50
`II. FIELDS SEARCHED
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`Minimum Oocumenlallon Searched 7
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`Classmcatlon Symbols
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`Documentallon Searched other than Minimum DocJ1menlatlon
`to the E11ent that such Documents ere Included In the Flelds Searched •
`
`111. DOCUMENTS CONSIDERED TO BE RELllVANT'
`Cllatlon ol Document, n with Indication. where appropriate, of the relevant PHHOH ta
`Cateoorr •
`
`Relevant to Claim No. u.
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`X,P
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`us, a, ,4959,855 (DAUDELIN) 25 SEPTEMBER 1990
`See column 2 lines 60-68,
`column 3 lines 1-19,
`column 4 lines 22-65,
`column 5 lines 38-4 7,
`C011Jl'.lln 8 lines 54-57
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`1-7
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`• Spe~ catagorias ol cited documents: 111
`"A" document denning the general atale of the art which Is not
`conaldtred 10 be ol partlc:ulor relevance
`"E" earlier document but publl1h1d on or after the lnt1mational
`nung date
`"
`.
`. .
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`"L" document whlcll may throw doubt• on priority c:lelm(1) or
`which ii died lo Hlabll•h·th• publlcatJon dete ol enother
`dlallon or other epedal ru1on (111 1p1dfled)
`•o• document relerring to an oral dl1clo1ura, uH, uhlblUon or
`other mean•
`•p• document pubUehed prior to lha lnlernotional rlUno data but
`later lhon th• priority date claimed
`
`IV, CIRTtflCATION
`D1te of the Actual Completlon ol the International Search
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`26 .rum: 1991
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`lntemaUOnal Searching Authority
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`"T" taler document publl1h1d alter th• lnternallonal fllino date
`or priority date and not In conflict with th• eppUcatlon but
`clled to understand t111 principle or theory undellylng lhe
`lnwentton
`"X" document of partlc:ular ralnance: the claimed' Invention
`cannot be con1ldere<1 nonl or cannot b• c:onsldered lo
`Involve •n inventive ll•P
`·
`•y•. document of particular relavanc1; 'the claimed Invention
`. cannot be conalderad to Involve an lnw1nllY1 1tep when the
`document 11 combined wtth one or more other 1uch docu-
`menlll, 1uc:h c:ombrnatlon being obvlou1 to a pe111on 1k1Ued
`In the 111.
`
`.,. document membtr of the same patent lamny
`I Date ol Malling of fhhl0 lnlimauonal Search Rlport
`01AUS1991
`..
`I ~ur~ed O~c:er _ . Q 6 Q~
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`HUY.EN D. LE
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`.per
`WORLD INTELLEcnJAL PROPERTY ORGANIZATION
`·
`lnle:malional Bureau
`INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATE~ COOPERATION TREATY (PCl)
`wo" 91/07838
`(51) Intemadonal Patent Oassificatlon 5 :
`(11) Intematlolial Pnbll~oa Number:
`H04M 11100, 1164, 1156, 1166, 3142
`30 May 1991 (30.05.91)
`
`(43) International Publlcatfoa Date:
`
`Al
`
`(21) International Appllcation Number:
`
`PCT/US90/06729
`
`(22) International FUlng Date:
`
`16 November 1990 (16.11.90)
`
`(74) Agents: BERG, Richard, P. et al.; Ladas & Pany, 3600
`WUsbire Boulevard, Suite 1520, Los Angeles, CA 90010
`(US).
`·
`
`••
`
`(30) Priority data:
`439,601
`480,242
`
`21 November 1989 (21.11.89) US
`·15 February 1990 (15.02.90) US
`
`(71)Appllcant: FULLER RESEARCH AND DEVELOP(cid:173)
`MENT COMPANY [US/US]; 325-118tb Avenue S.E.,
`Suite 300, Bellevue, WA 98005 (US).
`
`(72) Inventors: FULLER. Robert, M. ; 2225 179tb Avenue N.E.,
`Redmond, WA 98052 (US). EPLER, Frederick, A. ;
`l612S lSSth S.E., Issaquah, WA 98027 (US). MANOWS(cid:173)
`KI, Maxwell, E. ; 1204 LaFromboise Street, Enumclaw,
`WA 98022 (US).
`·-
`
`(81) Designated States: AT (European patent), AU, BE (Euro-
`. pean patent), CA, CH (European patent), DE (Euro(cid:173)
`pean patent), DK (European patent), ES (European pa(cid:173)
`tent), FR (European patent), GB (European patent), GR
`(European patent), IT (European patent), JP, KR. LU
`(European patent), NL (European patent), SE (Euro(cid:173)
`pean patent}.
`
`Published
`With intematicnal seart:lt l't!]JOrt.
`Before the expiraticn of th4 time limit for amending the
`claims and "to be republlsltd In the event of the receipt of
`amend menu.
`
`(54)Title: REMOTE ACCESS TELEPHONE CONTROL SYsTEM
`
`... -
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`(_.
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`(5'7) Abltnd
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`..
`. A telephone con~l system (1) which eni;umces the acccssability of system subscribers by· providing ·a variety of call(cid:173)
`bil.ndling modes, and vanous ways of programming by whlcb those subscriben can aallor the system. In opcll'liliOn, subscribers
`are each assigned a telephone nwnber (ACCESS NUMBER) which can be dialed from any location via the Public Switched
`Telepbono Network (PSTN) (2). Tbe control syste:ni determines which subscriber a call is Intended for, and by referring to a
`data base dctctmines tbc method of call handling whlcb bas been preselected by that subscriber (e.g. switching a call JO another
`telephone number). The switching function (4) may be located in the control system Itself, or located In the PSTN but under
`tbe control of the control system. Hcncc, tbe ACCESS NUMBER may be used as the 1ale telephone number for a 51.lbscriber.
`Callen need not know I.be suhscribers apcclfic whereabouts nor the subscriber's various loadion-spcclfic telephone numben
`IUCh aa home., office, car phone, end IO forth.
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`FOR 7'BB PURPOSES OF INFOllMA'1'10N ONLY
`
`Codes used to identify States party to the PCf on the front pages of pamphlets publishing international
`applications under the PCT.
`
`AT
`Awlrla
`Auslnl1a
`AU
`.n· ·. Balbldal.
`.BeJclwn
`118
`u
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`Bulprla
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`DK
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`FR.
`.Frucc
`'Gabon
`CA
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`GS
`CM
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`ca 0 -
`KU
`Hullpry
`IT
`llaly
`JP
`.lapm
`.KP
`Dc:mocr.adc f'lloplu .. Republic:
`of Kon:&
`Republic or rcon:.
`KR
`Lk:chl&::Alll:l11
`LI
`Sri L:ulb
`LK
`w Lu~
`Maaaco
`MC
`Mad1pn•
`MO
`
`....
`
`ML
`Mall
`MN
`Mongolia
`MR
`MaurlLlllll
`·MW Malawt
`Ncihcrtuids
`NL
`Norway
`NO
`PolaNI
`11.aawila
`Sudaa
`hudcn
`Scnc:pl
`Sottcl Union
`Cbacl
`Toeo
`Unlled S1a11:1 of America
`
`RO
`SD
`SB
`SN
`SU
`1D
`TC
`us
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`•
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`W091/07838
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`PCT/0~90/06729
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`1
`REMOTE ACCESS TELEPHONE CONTROL SYSTEM
`
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`TECHNICAL EIELD
`The present invention pertains to the telephone equipment art and, more
`particularly, to a telephone a>ntrol system which allows subscribers to remotely
`control a plurality of call handling utilities to pre.determinedly direct incoming calls .
`
`s
`
`INCORPQRATJQN BY REFERBNCB
`The subject matter disclosed and claime.d in U.S. Application Patent
`No. 4,893,335, issue.cl January 9, 1990, entitle.cl •Remote Access Telephone Control
`System•, invented by the same inventors and amgne.d to the applicant of the instant
`application, is hereby incorporated by reference.
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`BACKGROUNP OF THE INVENTION
`Despite the availability of numerous telephone central exchange provided
`functions, such as •call-forwarding•, · •tJtree..way calling\ •call-waiting• and
`"speed-dialing", as well as the advent and availability of paging and mobile telephone
`systems, the completion of a call to a system subscriber can often be a a>mplicated,
`time consuming and tedious task. Unless the telephone subscriber is located at the
`telephone which receives calls to his assigne.d phone number, a>mpletion of a call
`from a calling party, despite the aforementioned services, generally involves the
`calling party leaving a message and awaiting a call back by the subscriber. Even if
`the subscriber is accesst"ble via mobile telephone or a paging system, human
`intervention is a>mmonly required to look up and dial specific mobile telephone or
`.
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`paging numbers to attempt to. a>ntact the subscriber. Thus, additional delays and ·
`costs are incurred.
`In addition, even if the subscriber is on a paging system, the successful
`direction of a message to the subscriber requires that the subscriber manually inform
`the system of his whereabouts.
`Finally, existing telephone control systems offer very limited a>ntrol to either
`the subscriber or the calling party with respect to the processing of calls.
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`.SUMMARY OF THE IN\TENTION
`In summary, the present invention is directed to a control system which is
`connected to a telephone exchange and wherein each user of the system is assigned
`a unique telephone number with the control system routing calls to the user via a ~
`controlled number. The control system connmses an input/output device which is
`adapted for connection to the telephone exchange trunks or lines to input and output
`telephone calls. A switching control means controllably connects a call on one line
`to a different line. Provided memory controllably stores and recalls electronic
`signals. An electronic processing means is proVided for accessing the memory,
`switching control means and input/output device to direct the flow of input and output
`calls. The electronic processing means includes means for: a) identifying a call to
`the system from a caller directed to a specific user, b) recalling from the memory a
`forwarding number. for the user,. c) implementing a call to the forwarding number, .
`d) switching the caller's call to the forwarding number, e) identifying a call to the.
`system from a specific user, f) changing the specific user's memory stored forwarding
`number responsive to a command from the specific user, g) processing calls to the
`system directed to a specific user in a selected one of a plurality of modes and, h)
`changing a users call processing mode responsive to a command from the user.
`In accordance with one feature of the invention, the control system may
`forward incoming calls for a subscriber to a telephone number that has been
`preselected by the subscriber. The call may be directly forwarded, or may be
`preceded by a brief announcement informing the caller that the call is being
`forwarded.
`In.accordance with another feature of the invention, the control system may
`first screen incoming calls before causing them to be forwarded. The call may be
`screened by any of several methods, including a 'priority-Screen' which allows the
`caller to determine whether or not the call should be forwarded to the subscriber, a -
`'VIP code-screen• which will only forward calls if the caller enters a preselected
`code, and a 'voice-screen• which records the caller's name and business, places the
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`PCT/US90/067l9
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`caller on hold while contacting the subscriber, plays the recorded message, and allows
`the subscriber to determine if he wishes to be connected to the caller. · With any of
`these screening methods, should the call not ultimately be forwarded to the
`subscriber, then the call may be delivered to a 'message center', where a memge
`may be left for later pickup by the subscriber.
`In accordance with another feature of ~e invention, the control system may
`cause the subscriber's pager to be activated in conjunction with forwarding of a call.
`In this way, the subscn"ber is given notice that the call is being forwarded to the
`pre-selected telephone number.
`In accordance with another feature of the invention, the control system may,
`prior to forwarding a call, provide a courtesy message to the caller such .. as • .. when
`the call is answered, please ask for your party by name •. •, ·or altcrilately infonn the
`caller • •. when the call is answered, please ask for extension number 1234. • ·
`In accordance with·another feature·of the invention, the control. system may
`send all calls to a 'message center' where all messages may be left far later pickup
`by the subscriber. In this way the call is handled without distW:bing· the·subscriber.
`In accordance with another feature of the invention, the CODD:91 system may
`handle calls via a 'branch·routing' mode. In this mode, callers may choose from a
`directory of options. As an example, the caller may .be told: •vou have reached ABC
`Real Estate. Please touch 1 to speak to Mr. Smith, 2 to speak to Mr. Jones, or hold
`the line to speak to the receptionist.• Depending on the pri>grammhig of the system,
`each of these selections may cause the call to be forwarded to a· Specifi!: telephone
`number, or to another access number~ No command may ca~ the system to follow
`a predeterinined default method .for disposing of the call. ·.
`In accordance with another feature of ilie invention, the c:Ontro1 systein may
`handle calls via a 'm~-me' mode. In this mode, the caller i$ plac,ed on hold after
`being told that the user is being paged to a .phone. The control .system then pages the
`user. The user then may call the access system, and enter a.cO<le tO be connected to
`the caller. In addition, the caller may be given the opporttmity to touch 9 to leave
`a message if he does not wish to wait. If the caller chooses to leave· a message, then
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`when the subscriber calls in, he will be informed that the caller did not wait and
`instead left a message. If the caller hangs up without leaving a message, then the
`subscriber will be so informed.
`In accordance with another feature of the invention, the call-handling modes
`and other features of the control system may be programmed by the subscriber by .
`accessing a command mode by dialing the access number from a touch-tone phone,
`entering a Personal Identification Number (PIN) code, and then following a series of
`menu items to select the desired feature, call-handling mode, or forwarding number.
`This process is further simplified by providing the subscriber with 'mode memories'
`which contain the most often used call handling modes, and 'number memories'
`which contain often used telephone numbers such as home phone, office phone, c::ar
`phone, and so on.
`In accordance with another feature of the invention, the subscriber may invoke
`a 'feature timer' which will cause a new call handling mode to take effect at the
`expiration of a selected time interval.
`In accordance with another feature of the invention, the subscriber may invoke
`a 'weekly schedule' which will cause the current call-handling mode to be
`automatically selected from a pre-programmed list of call-handling modes, based upon
`the time-of-day and day-of-we.ek.
`In accordance with another feature of the invention, the subscriber may cause
`his calls to be forwarded to him at his current location, without the subscriber
`needing to enter the telephone number of the current location. Instead, the telephone
`number of the location is automatically received by the control system as an
`Automatic :Numb~r Identification (ANI) via ANI-capable facilitie5 frOm the Public.
`"
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`Switched Telephone Network (PSTN). The subscriber need only call the control
`system, enter his PIN code, and select a forwarding mode.
`In accordance with another feature of the invention, the subscriber may
`program the operation of the control system by picking up a preregistered phone such
`as his office or home telephone and touching a 2 or 3 digit speed-dial code. In
`combination with the ANI capability described above this makes programming very
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`simple. By way of example, If a subscriber is at home, he may pick up the phone
`and dial 10#. This causes the telephone company central office to memory dial an
`800 number with an NNX that points to ANI-a.pable tnm.ks connected to the control
`system. The control system recogni7.es the ANI as belonging to the home phone of
`one of it's subscribers. The control system then causes all calls to that subscriber_ to .
`be priority-screen forwarded to the home. ~ the subscriber had dialed 11#, an 800
`number with the same NNX but different last four digits would be dialed, which
`wo~d cause the control system to select voice-screened forwarding to the home, and
`so forth.
`In accordance with another feature of the invention, the subscriber may elect
`to make an 'outside call' while in the control system command mode, by touching 9
`and dialing the desired telephone number.·
`The control system is further enruinced by. the addition of a communicator
`feature. This feature allows a subscriber to move from place to place and have his·.
`calls follow him Without the need for him to call. into the eon_trol system~ The ·.
`communicator is a portable device carried on the sub~bCt's persari. The device
`.
`contains an RF transmitter, an RF receiver, an ·ultrasonic receiver,· a keypad, a
`'beeper', and control circuitry. The communicator receives u.Itrasrinic messages from
`.
`.
`small wall mounted ultrasonic_ transmitters. These transmitters contain the phone
`number, and optionally the extension number, of the nearest telephone or a mode
`appropriate for the location such as do not disturb in a hospi~ operating room. The
`communicator also receives radio frequency messages from· the eontro1 system
`indicating, or paging, an incoming call for the user. The eomm~nicator device can
`send various_ radio ·frequency· messages ·back to the· control sy$tem1. including a
`message containing the phone number received·. from the ultrasonic . transmitter, a
`message acknowledging receipt of the page, and· messages in . response to keypad .
`selections by the subscriber indicating a desire to select a new mode of call handling.
`A feature of the present invention provides a telephone eontrol system which
`allows subscribers to access the system, even remotely, _and implement any of a
`number of utilities for the handling of subscriber directed calls~
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`Another feature of the invention provides~ telephone control system wherein
`each subscriber is assigned one telephone number and calls to the system on that ·
`number are automatically directed to the subscriber regardless of his location.
`Another feature of the invention provides the above described telephone
`control system wherein the system interfaces with callers and subscribers via co~
`messages which minimize or eliminate then~ for users to recall complicated control
`commands.
`Another feature of the invention provides the above described control system
`wherein subscribers are provided with portable pager-like communicators which
`include RF transmitters for transmission directly to the paging system.
`Another feature of the present invention provides the above described control
`system wherein the communicator devices automatically respond to remote locater
`transmitters to transmit back to the control system the phone number of a telephone
`proximate the user.
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`BRIEF DESCRIPTION OF THE DRAWINGS
`Figure 1 is a block diagram illustrating the various modes of operation and
`interfacing equipment for the preferred embodiment of the telephone control system;
`Figure 2 is a block diagram illustrating the principle components of the
`telephone control system;
`Figure 3 is a block diagram of the Communicator;
`Figure 4 is a block diagram of the Ultrasonic Transmitter;
`Figure 5 is a block diagram of the Call Processing facility;
`.
`. . .
`Figure 6 is a flowchart illustrating operation of the E & M Control Circuit;
`Figure 7 is a diagram illustrating the SubsCrlber Master Record;
`Figure 8 is a diagram illustrating the Mode Memory;
`Figure 9 is a flowchart of the Main Task for the Call Processing facility;
`Figure 10 is flowchart of the Code Processing Facility-Network Message
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`Figure 11 is a flowchart of the Code Processing Facility-Call Terinination
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`PCT/US90/06729
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`Figure 12 is a flowchan of the Cal1 Processing Facility-Call Handler Task;
`Figure 13 is a flowchart of the Call Processing Facility-Dynamic Mode
`Assignment;
`Figure 14 is a flowchart of the Call Processing Facility-Direct Forwarding .
`Function;
`Figure 15 is a flowchart of the Call Processing Facilit}'-Announced Forwarding
`Function;
`Figure 16 is a flowchart of the Call Processing Facility-Priority/Urgent Screen
`• Function;
`Figure 17 is a flowchart of the Call P:roa-3sing Facility-VIP Code Screen
`Function;
`Figure 18 is a flowchart of the Call Processing Facility-Branch Routing
`· Function;
`Figure 19 is a flowchart of the Can Processing Facility-~_er Message Center
`Function;
`Figure 20 is a flowchart of the Call Processing Facility-Voice-Screen
`Function;
`Figure 21 is a flowchart of the Cal1 Processing Facility-Meet Me Caller
`Function;
`Figure 22 is a flowchart of the Call ProcesSirig · Facility-'Send Page'
`Subroutine;
`Figure 23 is a flowchart of the Call Processing Facility-Command Mode·
`.
`.
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`Fupction;
`.
`Figure 24 is a flowchart of the Call Processing Facility-Command Message
`Center Function;
`Figure 25 is a flowchart of the Call f7ocessing 'Facility-Command Forwarding
`Number Function;
`Figure 26 is a flowchart of the Call Processing Facility-Command Feature
`Timer Function;
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`Figure 27 is a flowchart of the Call Processing Facility-Command Memory
`Function;
`Figure 28 is a flowchart of the can Processing Facility-Command Outside Call
`Function;
`Figure 29 is a flowchart of the Call Processing Facility-Command Help .
`Function;
`Figure 30 is a flowchart of the Call Processing Facility-Command Meet Me
`Function;
`Figure 31 is a flowchart of the Call Processing Facility-Command Branch
`Route Function;
`Figure 32 is a flowchart of the Call Processing Facility-Command Advanced
`Features Function;
`Figure 33 is a block diagram illustrating the principle components of the Meet
`M~ Facility;
`Figure 34 is a flowclwt of the Meet Me Facility Main Task;
`Figure 35 is a block diagram illustrating the principle components of the
`Subscriber Access Facility;
`Figure 36 is a flowchart illustrating operation of the E & M Control Circuit
`for the Subscriber Access Facility;
`Figure 37 is a flowchart of the Subscriber Access Facility Main Task;
`Figure 38 is a block diagram illustrating the principle components of the
`Communicator Access Facility;
`Figure 39 is a flowchart of the Communicator Access
`Facility Main Task;
`F~ 40 is a flowchart of the Communicator Main Task;
`Figure 41 is a block diagram illustrating the principle components of the Pager .
`Dialing Facility;
`Figure 42 is a flowchart of the Pager Dialing Facility Main Task;
`Figure 43 is a block diagram illustrating the principle components of the Client
`Services Facility; and;
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`Figure 44 is a flowchart of the Client Services Facility Main Task.
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`O'VERVJEW OF TIIB JN\IENTION
`FIG. 1 illustrates in block diagram fonn, the manner in which the Telephone
`Control System may be used to enhance the accessibility of it's subscnl>ers. As is
`shown, the Telephone Control System 1 COJl:11ects with the PS'IN 2 v.ia facilities 3.
`The Telephone Control System 1 may control switch 4, causing it to connect
`incoming and outgoing trunks.
`As is shown, alternate preferred embodiments exist with respect to switch 4.
`In the first preferred embodiment, the switch 4 is actually part of the PSTN
`1. In this embodiment, the facilities 3 must be capable of transmitting sWitch control
`signals from the Telephone Control System 1 to the switch 4. An example of this
`type of facility is a CENT.REX line, which allows the transmission of switch control
`the form of 'hOokSwitch flashes' ·and touch · toneS
`initiate
`signals in
`tO
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`call-cOriferencitig and call-transfer. A recently availablevariation of the CENTREx
`facility is a CBNTRBX DID trunk, which not only has the 'hookflash' capability, but
`also provides the called number in the fonn of Di.TI:ct-Inward-Pialing digits. This is
`.
`.
`the form of facility 3 which is referred to in the detailed descripti0n of the preferred
`embodiment. Another variation of the CENTREX facility provides th~ called number
`via a separate data-link known as Simplified Message Desk Interface (SMDI).
`U.S. Patent 4,893,335, which issued January 9~ · i990; incorporated by
`reference herein, describes in detail a system for·co~trolling the PSTN.switch.
`.
`.
`In an alternate preferred embodiment, the. Switch 4 is part. of the. Telephone
`control System_ 1. In this embodiment,. the facilities 3 need only incl~e s~dUd
`DID trunks for the in~ming calls, and standard outgoing truriks. The ~ control
`system 1 controls switch 4 directly, . causing it to connect· paths between various
`incoming and outgoing trunks as required.
`Again :referring to FIG. 1, the Telephone Control System 1 also connects to
`the PSTN 2 via standard tip-ring phone lines S, for purp0ses of :commuiticating with
`Paging System 6. The Paging System may be any of the commonly known paging
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`those comprised of. transmitters such as Motorola's PACE or
`systems such as
`Quintron model QT250B and paging terminals such as Glenayre model GL3000XL
`or BBL System 3, which send encoded messages via radio frequency to cause a
`unique pager, or beeper, worn by a paging system subscnl>er, to sound an alert,
`produce a message in a display, activate a light, vibrate, or produce any of a variety·
`of other alerting mechanisms. Typically, th~ paging systems will cause a pager to
`be alerted in response to another individual dialing a phone number which
`corresponds to that individual's pager. This phone number is routed via the PSTN 2
`to a paging terminal via facilities 7, which in tum detennines, typically via DID
`digits, who the call is intended for, and then sends a radio frequency message to alert
`that individual's pager. To cause a subscriber's pager to be activated, the Telephone
`Control System 1 then need only come off hook on one of the lines 5, and dial the
`phone number that corresponds to the subscriber's pager. Although not described in
`this preferred embodiment, it is anticipated that the Telephone Control System 1
`could also interface to a paging system directly via a dedicated data link;
`An additional facility 5 connects the Telephone Control System 1 to the PSTN
`2. This facility is a trunk which provides the Automatic Number Identification (ANI)
`of the calling party. An example of such a trunk is the Feature Group D (FGD)
`trunk which is commonly used by interexchange carriers. The interexchange carriers
`use the ANl information to properly bill the calling party. The Telephone Control
`System 1 uses this ANl information in a new and different manner. As will be
`described in further detail herein, subscribers of the Telephone Control System 1 may
`program the Telephone Control System 1 by calling it through trunking facilities 5.
`The ~ control system· 1 automatically acquifes the ANI, or phone number of the
`Caning party. This allows ·the acces8· control sy8tem 1 to program the forwarding ·
`number for the subscriber without the subscriber needing to manually enter it.
`Although not described in the preferred embodiment, it is anticipated that other types
`of facilities which provide ANI infonnation may also be used for this purpose. An
`example of another type of facility which provides ANI is a CENTREX line with an
`SMDI data link, which is now available from several types of central offices. The
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`SMDI data link is capable of passing both the called party number and the calling
`party number (ANI).
`Still referring to FIG. 1, The Telephone Control System 1 is also connected
`to a Packet Radio Transmitter/Receiver 9 via data-link 10. The Packet Radio
`Transmitter/Receiver 9 may consist of any of the commonly known radio transceivers·
`such as YAPSU Ff-470 and lCOM IC-u 4Ai;, equipped with a packet radio interface
`such as HEATHKIT HK-21. As will be described in further detail herein, the Packet
`Radio Transmitter/Receiver 9 is used by the Telephone Control System 1 to interface
`with the portable Communic.a.tor device 11, canied by an Telephone Control System
`subscriber. The Communicator 11 may both send and receive DAT A messages via
`radio frequency. The Communic.a.tor 11 may also receive ultrasonic messages from
`fixed ultrasonic transmitter 12, shown located in room 13. Ull:!Uonic transmitter 12
`continuously transmits the phone number, and, ifappropnate, the extension, of the
`.
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`phone 14 located in the same room or a signal indicating an apptop:tiate call control
`mode for a given situation such as do not disturb. in a· hospital operating room. ·It
`should be noted that, although the preferred embodiment d~loSed herein describes
`.
`.
`transmitter 12 as ultrasonic, it is anticipated that an infrared trM,Smitter may also be
`used. The ultrasonic transmitter has the advantage that it will pass signals through
`a layer of clothes, which would be important for example if the subscriber were
`canying the Communicator 11 in a shirt pocket.
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`To aide in the discussion of the illustrative examples which follow, FIG. 1
`also shows a subscriber's home 15, with a home phone 16; a subscriber's office 17,
`with an office phone 18; a cellular telephone syStem 19.; which interfaces to a
`subscriber;s car-phone 20; a factory 21, with a factory ~h.on~. 22; a pay telephone 23;
`a subscriber 24 with pager 25; and a caller's telephone 26.
`The illustrative examples which follow are intended only· to clarify some of .
`the concepts, features, and objects of the invention,· and do not :defir.ie the scope of
`the invention.
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`Following are several illustrative examples of the various call-handling modes
`of the Telephone Control System 1. ·
`
`Direct Forwarding
`For the sake of this example, assume that a caller at phone 26 wishes to speak
`to a subscriber to the access control system 1, and further assume that the subscdber
`is at home 15, and that he has preprogrammed the system to 'direct forward' his calls
`to him at his home phone 16. The caller dials the access number for the subscriber,
`and the PSTN delivers the call to the Telephone Control System 1 via facilities 3.
`The facilities 3 provide the access control system 1 with the called party information
`(DID) digits. The Telephone Control System then refers to it's internal database to
`determine how to handle the call. The access control system determines that calls for
`this subscriber are to be handled via 'direct forwarding' mode, and that the call is to
`be forwarded to the subscriber's home. The .access control sy~tem then dials the
`subscriber's home on an outgoing facility 3, and instructs the switch 4 to connect the
`incoming facility to the outgoing facility to complete the call. The PS'IN 2 then
`delivers the call to home phone 16, causing it to ring, and the subscriber may pick
`up the phone and connect to the caller. Note that this mode of call-handling is
`referred to as 'direct forwarding' because the call is forwarded without any
`announcement or prompting from the Telephone Control System 1.
`
`Announced Forwarding
`Assume again that a caller at phone 26 wishes to speak to a subscriber to the
`Telephone Control System 1. Also asstnne that.the subscriber is at home 15, and that
`this time he has preprogrammed the system to 'Announce-forward' his calls to him
`at his home phone 16. Again, the caller dials the access number for the subscriber,
`