MXPA96006710A - Communication system and method using two-way radio-localization, to provide call control - Google Patents

Abstract

The present invention relates to a system and method for using two-way radiolocation to establish communication with a mobile part having a personal telephone number (PTN). The mobile part uses the two-way pager to transmit call control parameters, which are used by the telephony network to direct calls sent to the PTN of the called party. The mobile party may also use the pager to transmit a paging indicator specifying the subscriber location and inform the network of the subscriber's intention to receive calls according to a call screening procedure. To invoke the call examination procedure, the bandwidths and protocols of all possible terminating stations associated with the location of the subscriber are stored in the network on a previously arranged basis. Later, when a call is sent to the subscriber's PTN, the network determines the bandwidth and protocol of the originating station, chooses a terminating station that is located in the subscriber's site and has bandwidth and protocol that resemble more close to that of the station of origin, and direct the call to the selective termination station

Description

COMMUNICATION SYSTEM AND METHOD USING TWO-WAY RADIO-LOCALIZATION, TO PROVIDE CALLED PE CONTROL Cross-Reference to Related Requests This application relates to US patent applications. commonly assigned, pending, Nos. of Series 08 / 379,425 and 08 / 379,430; and relates to the three patent applications of the US. pending, concurrently filed, commonly assigned, with title: COMMUNICATION SYSTEM AND METHOD USING TWO-WAY PAGING TO PROVIDE CALL CONTROL (SYSTEM AND METHOD OF COMMUNICATION, USING TWO-WAY RADIOLOCALIZATION, TO PROVIDE CALL CONTROL) (Agent File Numbers: Foladare 11-13-17-19, Foladare 13-15-18-21, and Foladare 18-19-24-28); that are here incorporated by reference. FIELD OF THE IWVEMCIOW This invention relates to communication systems and more particularly to use radio location technology to establish communication with a moving part. AMTBCgDm BS DB THE IMVKMCIOM In general, people who wish to contact a particular party initiate a call to a known telephone specifically associated with that party, such as a wireless telephone or that party's office. A disadvantage of REF: 23560 This method of communication is that the parties are not always in immediate proximity with these associated phones, or for the same reason, in immediate proximity to any phone. This presents a problem to people who need to immediately contact a mobile party, regardless of the location of that part. Various technologies have been developed in an effort to solve the problems of establishing communication with a moving part. These include call forwarding, radiolocalization and cellular systems. However, each of these technologies has disadvantages that prevent communication without junctions and ubiquitous. COMPENDI EP THE INVENTION In particular, we have recognized that a disadvantage of the previous systems to establish communication with mobile parts is their failure to take into account the bandwidth and protocol of the originating and terminating telephone stations. For example, under the present call forwarding schemes, a called party that wishes to send a call to a termination station of that part selection, typically does so without knowledge of the calling party's bandwidth and protocol. In addition, the request to send the called party; typically it includes only the telephone number of the termination part, and does not include a bandwidth and protocol of the terminating station. In this way, a request to send the called party does not inform the network providing the service of sending the bandwidths and protocols of the origin and termination stations. It has also been recognized that due to the above, a network can not optimally assign its communication channels and can not provide protocol translation between the originating and terminating stations. Therefore, according to the principles of the present invention, the network a) is informed of, or determines, various parameters and capabilities (for example bandwidth and protocol) of the call originated by the subscriber, and b) stores various parameters and capabilities of potential terminating stations, so that you can assign a compatible channel that is best suited to the requirements of the call. In particular, the invention provides a form of a network serving a mobile subscriber; to take into account the bandwidths and protocols supported by the originating and terminating stations; when calls are sent to the subscriber. A mobile person wishing to take advantage of the present invention is equipped with a two-way locator radio and a Personal Telephone Number (PTN) is assigned. The mobile person uses the paging radio to transmit one or more call control parameters to a radio location service which in turn retransmits the parameters to the telephony network. The telephone network can then use the parameters to control calls directed to the person's PTN. For example, the parameters may include a termination station number, to which the calls sent to the PTN; they will go. The parameters can be transmitted to a "record" base, in which case they are stored in a database and retrieved when a call is routed to the subscriber's PTN; or on a "call-by-call" basis, in which case the mobile person transmits the parameters in response to a radio location that alerts the person of a call to the PTN. The call control parameters may also use a location indicator that signals to the network that a call examination procedure shall be invoked. The call examination procedure is invoked by a subscriber when he chooses to have the network automatically send incoming calls to a terminating station at a particular site that better adjusts the bandwidth and protocol of the subscriber's call. According to this procedure, the location indicator informs the network of the general location in which the subscriber wishes to receive calls. The bandwidths and protocols that are supported by the terminating stations associated with the location are stored in the network on a previously arranged basis.

The routing of a call by call examination proceeds as follows. When initiating a call to the subscriber, the network notices that a location indicator has received from the subscriber - either through a service of type "registry" or "called-by-11amada". The network then "examines" the call to determine its call parameters, for example bandwidth and protocol, and compares the call parameters with the parameters that can be supported by the terminating stations for the given location. It should be noted that there are many different types of calls to which the invention can be applied, such as: voice, data, fax and multimedia. In any case, the call is routed to the terminating station at the location that supports the parameters, for example bandwidth and protocol, which correspond or more closely resemble the call parameters. Advantageously, the present invention allows a subscriber to request that for incoming calls, the network automatically chooses an appropriate terminating station at the location identified by the subscriber. This automatic addressing relieves the subscriber of the load from determining (a) the bandwidth and protocol that are used by the originating station, (b) the bandwidths and protocols that can be used by the available terminating stations, and ( c) the best correspondence between the station of origin and the available terminating stations. Another advantage of the call screening procedure is that the network can allocate an optimal communication channel for communication between the originating station and the selected completion station. Furthermore, communication between stations that do not have a common protocol can be facilitated by the network, for example when using protocol conversion. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic block diagram of a communication system according to the present invention. Figure 2 is a schematic block diagram of a preferred embodiment of a communication system embodying the present invention. Figure 3 illustrates a suitable locator radio for use in accordance with the present invention. Figures 4A and 4B constitute a flow diagram illustrating the procedure followed to update a subscriber's termination number. Figure 5 is a flow diagram illustrating the procedure followed to direct a call according to the present invention. Figure 6 is a schematic block diagram of a further embodiment of a communication system according to the present invention.

Figure 7 is a schematic block diagram of a communication system that can be used to implement call-by-call addressing. Figure 8 is a schematic block diagram of an existing telephony network incorporating the elements of Figure 7. Figures 9A and 9B constitute a flow chart illustrating the steps taken in directing calls on a call base. per-call. Figure 10 is a flow diagram showing how subsequent addressing is implemented in the preferred embodiment of Figure 6. Figure 11 is a flow diagram showing the additional call addressing steps to be taken when the routing service of call-per-call of the present invention includes a radio locator status feature. PBffCHTfXTTON PKTAT.T-A With reference to Figure 1, a block diagram of a communication system embodying the present invention is illustrated. According to the invention, a calling subscriber will be able to direct a call to a mobile part equipped with a two-way paging radio 10. The calling party initiates the call by a calling subscriber telephone 12. At this point, it should be noted that the telephone of the calling subscriber, like all the other telephones discussed below, it is simply employed as an illustration and that the invention can be implemented using a variety of communication devices, including but not limited to telephones, computers, fax machines, video telephones and multimedia terminals. In any case, the telephone of the subscriber ^ e calls 12 is coupled to a switch for network access 14, by a first communication coupling 16. (Note: the first communication coupling 16, and all communication links described below , can take the form of a telephone line, twisted pair line, coaxial cable, fiber optic line, wireless link, or any other type of communication link). A second communication link 22 couples the switch for network access 14 to a Network Control Point (NCP) 24, which in turn couples to a database 34 through a third communication link 26. The database is it couples to a radio location service 28 via a fourth communication link 27. The mobile part uses the paging radio to transmit a routing signal, represented by the wireless link 30, to the radio location service. The driving signal includes one or more parameters for call control that are associated with a terminating telephone 32, such as a termination number, a bandwidth and a protocol. The addressing signal may also include a paging radio identification number that may be used by the radio paging service to identify the paging radio locator. Although the bandwidth and the protocol are used throughout this description as illustrative call control parameters, it should be noted that other types of parameters may be employed without departing from the principles of the invention. Upon receiving the addressing signal from the radio locator, the radio location service retransmits the signal to the database where the termination number, bandwidth and protocol are extracted from the signal and stored. The termination number, bandwidth and protocol supplied by the mobile part are cross-referenced with the PTN of the party such that when the PTN of the party is marked, the number, bandwidth and protocol for that part can be recover from the database. When a calling party initiates a call by dialing a mobile party PTN, the call is coupled to a switch for network access 14 by a first communication link 16. The switch for network access 14 then interrogates the NCP for instructions by a second communication link 22, and the NCP, in turn interrogates the database through the third communication link 26. Based on the marked PTN, the database retrieves the termination number of the moving part, width band and protocol and passes them back to the NCP through the third communication link. The NCP, in turn, passes the number, bandwidth and protocol to the network access switch 14 which uses the parameters to redirect the call to the terminating telephone 32. The network access switch 14 redirects the call to the terminating telephone by a fourth communication link 20. At this point, the call can be answered by the mobile part in the terminating telephone. In light of the following description, it will be apparent to those skilled in the art that the database 34 may be incorporated into the NCP 24 or radio location service 28, in which case the present invention may be implemented without a base element of separate data. It will also be apparent that the addressing signal can include any combination of the termination number, bandwidth and protocol elements. For example, the two-way paging radio can be used in call-by-call mode, to transmit only one termination number and bandwidth while the protocol is considered the most recently registered protocol. In a preferred embodiment as illustrated in Figure 2, the present invention is incorporated into an existing telephone network. As illustrated in the Figure, the calling party 40 seeks to establish communication with a mobile or "subscriber" party, 76 which is assigned a Personal Telephone Number (PTN) and equipped with a two-way radio locator 77. The The calling subscriber initiates a 41 telephone entry call by dialing the subscriber's PTN. This incoming call is coupled to a first local exchange 42 at the calling subscriber's facility through the first telephone line 54. The first local exchange directs the call to an originating access switch 44 on a first trunk 56 The switch 44 may take the form of a digital switch, or an electronic switching system such as the AT &; T 4ESSMR (switch "4E"). For a more complete description of a 4E switch, see, The Bell System Technical Journal, Vol. 56, No. 7, p. 1015-1320, pub. Sept. 1977. Once the call has been routed to the switch 44, the switch 44 interrogates a Network Control Point (NCP) 66 through a first Inter-Channel Common Channel Signaling (CCIS) link 78. (Channel Inter-Channel Signaling) Common refers to the transmission of a call control signal between telephony exchanges, wherein a plurality of call control channels are aggregated into a single data link). At this point, if the subscriber has provided the collection of Digits Supplied by the Client (CED), the NCP instructs the switch 44 to connect the call to a Voice Response Unit (VRU) 43 via a first communication link 57. The VRU (eg an AT & T Network Services Complex, or NSCX) then plays a standard announcement announcement to the calling party and retrieves the CED (eg Personal Identification Number, or PIN) by receiving up to 10 digits, which may be indicated in the form of Dual Tone Multi-Frequency (DTMF) signals. In a system that uses CED, it must be provided for the case where a subscriber can not provide the digits because the calling party is on a rotary dialing station or does not respond to the signal. In these two situations, the VRU can allow a time ending or abbreviated dialing sequence (for example #) to denote that digits will not follow. Any CED collected by the VRU is passed back to the NCP. After the CED collection, or immediately after the originating access switch interrogates the NCP, whichever is the case, the NCP interrogates the Client Address Point (CRP) 68 via a second CCIS 67 link. Inquiry, the NCP sends to the CED, the PTN, and the telephone number of the calling party (Automatic Number Identification Number, or "ANI"). Based on the ANI and / or CED, the CRP classifies the call, deciding whether or not the call will be addressed directly to the subscriber. If the call is not going directly to the subscriber, the CRP instructs the NCP to direct the call to an alternate processing, such as a voicemail. If the call is going directly to the subscriber, the CRP accesses a subscriber register stored within the CRP, retrieves a termination number, bandwidth and protocol for the subscriber from the registry and returns the parameters to the NCP through the CCIS link 67. The NCP retransmits the termination number, bandwidth and protocol to the originating access switch via the CCIS 78 link, where the parameters are used to redirect the incoming call. The subscriber can update the termination number, bandwidth and protocol at any time using a two-way radio locator. To update the termination number, bandwidth and subscriber protocol 76, it generates a routing signal containing the new parameters using the two-way radio locator 77. The routing signal is transmitted to a radio location service transceiver 74. The transceiver retransmits the signal to a satellite earth station 70, either directly via communication link 85 or indirectly, via a wireless link 86, satellites 72 and wireless link 84 via wireless link 86. The satellite ground station in turn passes the signal to the CRP via a second communication link 82. The CRP extracts the new termination number, bandwidth and protocol and uses them to update the subscriber's CRP record. Calls are directed based on the most recent update of the CRP record. As described above, when an incoming call passes the classification by the CRP, the NCP 66 retrieves the termination number, bandwidth and protocol of the CRP 68 and passes it to the originating access switch 44 to use in redirecting the call to a terminating telephone 92. The redirection from the originating access switch to the terminating telephone is achieved through : a second trunk line 58, a termination access switch 60 (which as switch 44, may be a digital switch or a switch 4E), a third trunk line 62, a second local exchange 64 and a second telephone line 90 The originating access switch couples the call to the terminating access switch on the second trunk line. The terminating access switch in turn couples the call to the second local exchange on the third trunk line. The second local exchange then couples the call to the terminating telephone on the second telephone line. After the redirect is complete, the call can be answered by the subscriber in the terminating telephone.

Figure 3 shows an illustrative embodiment of a two-way radio locator 102, a transceiver 112, a satellite 114, a satellite ground station 116, wireless links 111, 113 and 115, and a communication link 117, the mode is suitable to be used in accordance with the present invention. The locator radio 100 includes: a display 102, such as a liquid crystal display, or light emitting diode display; a selection key 104; a menu key 106; a keypad or numeric keypad 108; and a mode indicator 110, which may be included within the display 102. Figure 3 will be referred to in the following discussion of the flow chart in Figures 4A and 4B. Figures 4A and 4B show the steps that are taken in updating the subscriber termination number. The locator radio of Figure 3 can be used to update the termination number in a "record" base as described in the cross reference request of the US. Serial No. 08 / 379,430, or on a "call-by-call" basis, as described in the cross reference application Serial No. 08 / 379,425. In this way, the description that follows includes providing both "record" and "call-by-call" updates. The first step the subscriber takes to update the termination number, bandwidth and protocol is to press the menu key 104 on the locator radio 100 (step 202). The word "update" will appear in the display 102. The subscriber then presses the selection key 106 to choose "update" (step 204). The word "update" will flash in the display to indicate that the subscriber can access the updated information (step 206). The subscriber can now feed the termination number, bandwidth and protocol by means of the numeric keypad 108, followed by the # key to indicate the end of the power (step 208). To provide a special call handling instruction (as described in US Patent Application Serial No. 08 / 379,425), such as a conference call instruction, a number associated with this instruction will be fed instead of a termination number (step 208). A subscriber who does not want to change the termination number, bandwidth or protocol and does not want to feed a special instruction number, can simply press the # key without typing any information. Furthermore, in a preferred embodiment, the locator radio is equipped with the ability to store termination numbers, bandwidths and protocols, such that abbreviated key sequences can be employed in place of manually provided updates. For example, the subscriber's office telephone number may be stored in the locator radio memory in a first site and the telephone number of the subscriber's home may be stored in the locator radio's memory in a second site. Subsequently, when the subscriber wishes to change the termination number to the office number, the subscriber simply types 1 followed by the # sign. Similarly, when the subscriber wishes to change the termination number to the house number, the subscriber simply types a 2 followed by the # sign. In any case, after receiving a # sign # feed, the radio locator mode indicator will flash (step 210). At this point, the subscriber must choose the desired mode (step 212). The locator radio determines whether the desired mode is the current mode (step 214 when the desired mode is the registration mode, step 222 when the desired mode is the call-by-call mode). If the subscriber desires the registration mode and the current mode is not the registration mode, then before the flashing mode indicator goes to continuous, the subscriber presses the selection key 106 to change the registration mode (step 216) . If the subscriber wants the registration mode and the current mode is the registration mode, the subscriber allows a period of time to pass, after which the flashing mode indicator will go on continuously; or alternatively, the subscriber can press the # key to shorten the synchronization and retain the current mode (step 218).

Similarly, if the subscriber desires the call-by-call mode and the current mode is not the call-by-call mode, then before the flashing mode indicator becomes uniform, the subscriber presses the selection key 106 to switch to call-by-call mode (step 224). If the subscriber wants the call-by-call mode and the current mode is call-by-call mode, the subscriber allows a period of time to pass, after which the flashing mode indicator will go on continuously; or alternatively, the subscriber can press the # key to trim the synchronization and retain the current mode (step 226). After the mode has been chosen, the locator radio signals the transceiver 112 via the wireless link 111, sending the radio locator code, updated termination number, updated bandwidth, updated protocol and a mode indicator (step 220 for registration mode; stage 228 for call-by-call mode). Following reception of the paging radio transmission, the transceiver 112 retransmits the paging radio code, new call control parameters, and mode indicator to the satellite earth station 116 (step 230), either directly on the paging coupling. communication 117, or indirectly through satellite 114 and wireless links 113 and 115. The next step (step 232) depends on the select mode. When the registration mode is chosen, the satellite station determines the subscriber's PTN from the radio locator code, uses the PTN to retrieve the Subscriber Client Address Point (CRP) Register and finally updates the registry to reflect the new mode, termination number, bandwidth and protocol. When the call-by-call mode is chosen, the satellite station simply retransmits the updated parameters to an auxiliary (described in US Patent Application Serial No. 08 / 379,425) where it is used to direct calls to the Subscriber The update is complete after step 232 (step 234). Figure 5 shows in flow chart form, the steps that are taken in directing a call according to the present invention. In the following discussion of Figure 5, references will be made to Figure 2. As illustrated in Figure 5, a calling subscriber initiates a call by dialing the subscriber's PTN (step 300). The call is routed to the originating access switch (step 302) which interrogates the NCP to direct information (step 304). At this point, if the subscriber has provided collection of a CED, the NCP instructs the originating access switch to connect the call to VRU to collect the DTMF digits, and pass the collected digits back to the NCP (optional step 306) . After collecting the CED digits, or immediately after step 304, whatever the case, the NCP interrogates the CRP for the subscriber's registration, sending the CRP, PTN and ANI to the CRP (step 308). The CRP then retrieves the subscriber's registration based on the PTN (step 310). The record includes a termination number, bandwidth and protocol and may include instructions to classify the incoming call. If the subscriber has provided the subscriber record to initiate call classification, the CRP classifies the incoming call (determines the appropriate treatment for the call) based on the CED and / or ANI (step 312). Based on the classification made in step 312, a decision is made whether or not the call is addressed directly to the subscriber (step 314). If the call is not going directly to the subscriber, the CRP instructs the NCP to direct the call to an alternate processing, such as a network advertisement, voice mail, or service platform (step 316). If the call is going directly to the subscriber, the CRP returns the termination number, or "Network Address Number", the bandwidth and the protocol to the NCP. The NCP uses the number to route the call to the terminating telephone where it can be answered by the subscriber (step 318). The NCP can use the bandwidth and / or protocol to allocate a convenient channel for the call, and can use its knowledge of the subscriber's protocol to communicate with the subscriber in this protocol (ie the NCP can act as a protocol translator ). After redirecting the call, the processing of the call is complete (step 320). With reference to Figure 7, a block diagram is illustrated tcontains the main elements of a communication system tcan be used to implement a call-by-call addressing. As illustrated in the figure, a calling party initiates a call from a subscriber telephone calling 12 'to a mobile party tis equipped with a two-way paging radio 10'. The telephone of the calling subscriber is coupled to a first network switch 14 'by a first communication link 16'. The first network switch is in turn coupled to a second network switch 18 'by a second communication link 20'. The second network switch is coupled to an auxiliary 24 'via the third communication links 22', and to a third network switch 26 ', via a fourth communication link 30'. In this way, there is a path between the telephone of the calling subscriber and the attendant, and a path between the calling subscriber telephone and the third network switch. The auxiliary 24 'is an intelligent component tcan be external to the network and connected to the network in the same way ta switch or a telephone is connected. An example of an external auxiliary are Voice Response Units (VRU).

Two possible ways to connect the auxiliary to a network are: through a Common Channel Interchange Signaling Link (CCIS) and through an Integrated Service Digital Network (ISDN) communication link. In an alternate mode, the auxiliary is an internal network element, such as a switch 4E, in which case the auxiliary function remains the same, but a connection link is not required. When a call is initiated by marking the PTN of the moving part, it is coupled to the auxiliary 24 'via the couplings 16', 14 'and 22', and the switches 14 'and 18'. The assistant puts the call on "hold" and based on the identity of the mobile part (known through the PTN), retrieves the necessary information to locate the mobile part. This information may be contained in a database internal to the auxiliary or may be read from an external database (not shown). The auxiliary 24 'passes the necessary radio location information to a localizing radio service 28' via a fifth communication link 34 '. The radio location service then transmits a radio location activation signal and a calling subscriber identification signal, both intended for reception by the two way radio locator 10 '. The locator radio 10 'is equipped with: an alarm that is activated in response to the radio locator activation signal, an exhibitor that responds to the caller's identification signal, and a keypad to specify a termination number, width of band, protocol or special instructions. A mobile party that is alert to a call can verify the locator radio display, to identify the calling subscriber and / or the bandwidth and protocol of the originating station. The mobile party can then decide how to handle the call based on the information displayed. One possible treatment is to direct the call to a party phone called 32 '. The called party telephone can be a nearby telephone station or some remote telephone station, such as a secretary's station. To direct the call to the called party's telephone, the mobile party types in the telephone number, bandwidth and protocol of the party's telephone to the paging radio, using the pager's radio keypad, and then transmits the information to the paging service. radio location 28 '. Alternatively, the termination number, bandwidth and protocol can be "typed" by choosing from one or more selections provided by the auxiliary that are transmitted to the radio locator by the radio location service. In any case, the radio localization service passes the termination number to the auxiliary where it is used to direct the call. Other possible call treatments include those that can be used when the moving part is busy. If the mobile party is busy with a call when a subsequent call to the party's PTN is placed, the party can direct the subsequent call to the alternate terminating station, place the previous caller on hold and speak to the subsequent calling party. , or use the paging radio to transmit a conference call instruction to speak to both callers at the same time. Also, if the mobile party has directed the subsequent call but remains free before the subsequent calling party disconnects, the party may interrupt the addressing of the subsequent call and redirect the call to the party. In the configuration of Figure 7, the auxiliary 24 'directs the incoming call by holding the call on the auxiliary while it sends a second call from the auxiliary to the called party's telephone 32'. This second call is routed through: communication link 22 ', second network switch 18', communication link 30 ', third network switch 26', and sixth communication link 36 '. After the second call is completed, the auxiliary bridge the incoming call and the second call together, so that the telephone of the calling party is coupled to the telephone of the called party through the auxiliary, as an alternative, the auxiliary can merge the incoming call and the second call on the second network switch, in which case the assistant takes the call off. Once the incoming call and the second call have been bridged or merged into a "directed call", the directed call can be answered by the mobile part on the telephone 32 '. A similar procedure can be employed to implement special call handling instructions. For example, in the case of a conference call between two callers and the mobile party, the attendant can bridge or merge the two incoming calls of the subscribers calling an outgoing call to the mobile party. Figure 6 is a schematic block diagram of a further embodiment of a communication system according to the present invention. Figure 6 is identical to Figure 2, except for the additional elements: auxiliary 73, switch 47, communication couplings 45, 49, 71, 75 and wireless link 87. The system of Figure 6 can be used to offer the subscriber all the characteristics associated with both the registration mode and the call-by-call modes of operation. Figure 8 shows how call-by-call addressing can be implemented in an existing telephony network. As illustrated, a calling party 40 'seeks to establish communication with a mobile party, or "subscriber", 76' who is equipped with a two way radio locator 77 '. A Personal Telephone Number (PTN) is assigned to the subscriber. The calling party initiates an incoming call from a telephone 41 'by dialing the PTN of the mobile party. This incoming call is coupled to a local exchange 42 'in the locality of the subscriber calling through a telephone line 54'. The local exchange 42 'directs the call to a source access switch 44' on a trunk line 56 '. The switch 44 'may take the form of a digital switch, or an electronic switching system such as the AT &; T "4E". Once the call has been routed to the switch 44 ', a Network Control Point (NCP) 66' receives the call signaling information, including the marked PTN, on the CCIS link 78 '. The NCP uses the dialed number to retrieve addressing information from the associated NCP database. The NCP then directs the call on a trunk line 58 'to a terminating access switch 46', which as the originating access switch, may be a digital switch or a switch 4E. The switch 46 'is connected to an auxiliary 68' via an ISDN link 80 '. The termination access switch is capable of merging calls in response to a signal from the auxiliary. The ISDN link provides the auxiliary 68 'with both the called number (Subscriber PTN) and the calling number (Automatic Number Identification Number or "ANI"). The auxiliary retrieves the current status information and subscriber registration based on the PTN. From the subscriber's record, the assistant also determines whether or not the subscriber is provisioned to receive a Personal Identification Number (PIN). If the subscriber is thus provisioned, the auxiliary 68 'plays a standard signaling announcement to the calling subscriber after which the PIN is collected from the calling subscriber by reception of up to 10 digits, indicated for example in the form of Multi- signals. Dual Tone Frequencies (DTMF). In a system using PINs, provision should be made for the case in which a calling subscriber can not provide a PIN because the calling party is a rotary or disk dialing station and for the case where a subscriber Caller does not respond to the signal. In these two cases, the auxiliary 68 'may allow a period of time or an abbreviated dialing sequence (for example #) to denote that it has no PIN. Regardless of whether or not a PIN is collected, the auxiliary 68 'proceeds to determine whether the subscriber 76' is busy with another call to the subscriber's PTN. Store this determination and then continue processing the call. At this point, the assistant plays an announcement that the system will "search" for subscriber 76 *. On a base pre-provisioned by the subscriber, the auxiliary 68 'may play an announcement to the calling subscriber 40' as a warning to remain on the line while awaiting call termination. Meanwhile, the auxiliary retrieves the subscriber locator radio code (known from the PTN) and transmits the code together with the ANI of the calling subscriber (or PIN, if available) to a satellite station 70 'via a radio link. 82 'communication. The satellite station broadcasts the radio locator code and ANI (or PIN) to a radio location transceiver 74 'either through a satellite 72' or through a communication link 85 '. When the satellite is employed, the radio locator code and ANI (or PIN) are transmitted to the satellite via a wireless link 84 '. The satellite in turn broadcasts the radio locator code and ANI (or PIN) to the transceiver via a wireless link 86 '. The communication coupling 85 'is used when the two-day paging radio is equipped for location registration. Under the location registration scheme, the two-way paging radio periodically sends a signal from which the satellite station determines the region within which the moving part is located. Once the satellite station knows the region of the mobile part, it only requires sending the radio location information to the transceiver associated with this region. In this way, the need for a national broadcast to all satellite transceivers is avoided. In this way, when the location register is used, the satellite station 70 'can transmit the localizer radio code and ANI (or PIN) to the transceiver 74' via the communication link 85 '. It will be understood by those skilled in the art that separate communication links from the satellite station to each transceiver are not required. Conversely, signals to a transceiver that does not link directly to the satellite station can be retransmitted from the transceiver over a transceiver network linked to the satellite station. Regardless of whether the satellite 72 'or the communication link 85' is employed, the transceiver 74 'broadcasts a radio location signal that includes a radio locator code and ANI (or PIN) to the subscriber locator radio. The spread of the transceiver 74 'to the locator radio 77' is represented by a wireless link 88 '. Upon receiving the radio signal localization of the transceiver, the subscriber is alerted to the call and responds by sending a routing signal. The subscriber can include any of a number of possible responses in the addressing signal. The subscriber may choose to direct the call to a telephone station of the subscriber selection, in which case, the subscriber uses the two-way pager to transmit the number, bandwidth and protocol of the terminating telephone station to the subscriber. transceiver. In a preferred embodiment, the alert location includes the bandwidth and / or protocol of the originating telephone 41 *. In this mode, the pager can display the bandwidth and / or protocol to the subscriber and the subscriber can then choose a terminating station of corresponding bandwidth and / or protocol. As an alternative, the subscriber may not specify a terminating station in fact, but instead may direct the call to voice mail, or some other treatment, in which case the subscriber uses the pager to transmit a number associated with the processing wanted. The independence of the radiolocation and communication paths makes it possible for the subscriber to direct calls to the subscriber's PTN, even when the subscriber is busy with a previous call. This will be valid regardless of whether the previous call is routed to the subscriber's PTN or directly to the telephone station in which the subscriber answers the previous call. In this way, in an illustrative scenario, the subscriber directs a first subscriber who calls a nearby telephone station and answers the call at that station. Then, while the first caller is speaking, the subscriber directs a second subscriber who calls a secretary, directs a third call to voicemail and so on. In this way, subsequent calls can be directed without interrupting the first call and without the first caller being aware of it. Furthermore, the subscriber can control the call parameters for each of the subsequent calls. In addition to transmitting instructions for call routing, the subscriber can transmit special call handling instructions, indicating that specific actions are to be taken, such as placing a calling subscriber on hold, switching between calling subscribers, creating a call from conference, and release a voicemail call and direct it to the subscriber. In a possible mode, these special instructions increase by assigning them a number that the subscriber sends to the transceiver in the same way that a termination number is sent. Thus, in an example of switching between calling subscribers, a busy subscriber who receives a second call can send the number 999 to the transceiver indicating that the first calling subscriber should be put on hold and that the second calling subscriber be directed to the subscriber's present telephone station. In an example of clearing a voicemail call, a busy subscriber who has directed a subsequent call to voicemail but is subsequently free to take the subsequent call, may send the number 000 to the transceiver before the subsequent calling party disconnect from voicemail, the 000 indicate that the subsequent call will have to be released from voicemail and directed to the subscriber. Regardless of the treatment for select call handling by the subscriber, the two-way radio locator transmits the addressing signal to the transceiver 74 *, as represented by the wireless link 89 *. The transceiver retransmits the transmissions from the localized two-way radio to the satellite station 72 *, either via satellite 72 * via wireless links 86 and 84 *, or through 85 * communication links. The satellite station then retransmits the instructions from the subscriber to the auxiliary via the communication link 82 *, and the auxiliary responds accordingly. To direct the call to a party called 52 *, the auxiliary initiates a second call. The second call is directed to a third access switch 48 * via a trunk line 60 * (like switches 44 * and 46 *, switch 48 * can be a digital switch or a switch 4E). The third access switch then directs the second call to a local end exchange 50 * based on the termination number, bandwidth and protocol that are provided by the subscriber, the number of terminations is the called party telephone number 52 * to which the designated call will be directed. The local end exchange couples the second call to the call party telephone via telephone line 64 *. When directing the call, the auxiliary and / or second access switch may use the bandwidth and / or protocol to allocate a convenient channel for the second call and may use its knowledge of the subscriber's protocol to communicate with the subscriber in accordance with that protocol (that is, the auxiliary or second access switch can act as a protocol translator). At the end of the second call, the call from the subscriber calling the PTN (waiting in the auxiliary), and the second call, either are bridged together with the auxiliary 68 * (in which case the auxiliary remains with the call) or they are fused in switch 46 * (in which case the auxiliary is removed from the call). If the calls are bridged, the assistant can implement the characteristics of placing a calling party on hold, switching between calling subscribers, creating a conference call and interrupting a previously addressed call. Whereas if the calls are fused, the switch 46 * can implement these characteristics under the auxiliary direction. During the time interval between subscriber PTN dialing to initiate a call and the final disposition of that call (the call setup time) an elaborate announcement may be played which calls as a stimulus to remain online while the call is being made. process Figures 3, 4A and 4B will be referred to in the following discussion of the procedure for updating the termination number, bandwidth and protocol according to the call-by-call mode. The first step that the subscriber takes in updating the parameters for call control is to press the menu key 104 on the pager 100 (step 202). The word "update" will appear in the display 102. The subscriber then presses the selection key 106 to choose "update" (step 204). The word "update" will flash in the display to indicate that the subscriber can provide the update information (step 206). The subscriber can now feed the parameters for call control by means of the numeric keypad 108, followed by the # key to indicate the end of the power (step 208). To provide a special call handling instruction, such as a conference call instruction, a number associated with that instruction will be fed in instead of a termination number (step 208). A subscriber who does not want to change the call control parameters and does not want to feed a special number of instructions, can simply press the # key without typing any updated parameters.

Furthermore, in a possible embodiment, the locator radio is equipped with the ability to store parameters for call control, such that sequences of abbreviated keys can be used to change the active parameters. For example, the telephone number of the subscriber's office may be stored in the memory of the paging radio in a first site, and the telephone number of the subscriber's house may be stored in the memory of the paging radio in a second site. Subsequently, when the subscriber wishes to change the termination number to the office number, the subscriber simply types 1 followed by the sign # 1. Similarly, when the subscriber wishes to change the termination number to the house number, the subscriber simply types a 2 followed by the # sign. In any case, after receiving a power #, the pager mode indicator will flash (step 210). At this point, the subscriber must choose the desired mode (step 212) (To implement call-by-call addressing, the subscriber will choose a call-by-call mode). The pager determines whether the desired mode is the current mode (step 214/222). If the subscriber desires the call-by-call mode and the current mode is not the call-by-call mode, then before the flashing mode indicator goes to continuous, the subscriber presses the selection key 106 to change the call-by-call mode (step 224). If the current mode is call-by-call mode, the subscriber allows a period of time to pass after which the flashing mode indicator will go on continuously; or alternatively, the subscriber can press the # key to trim the time and retain the current mode (step 226). After the mode has been chosen, the pager signals the transceiver 112, sending a pager code, updated termination number, updated bandwidth, updated protocol, and a call-by-call mode indicator (step 228). After receiving the pager transmission, represented by the wireless link 111, the transceiver 112 retransmits the pager code, updated control parameters, and mode indicator to the satellite station 116 either through the wireless link 113, satellite 114 , and wireless link 115; or, when location registration is used, through communication link 117 (step 230). Finally, the satellite station retransmits the information to the assistant where it is used to direct an incoming call (step 232). At this point, the update is complete (step 234). Figures 9A and 9B show, in flow chart form, the steps taken to direct calls on a call-by-call basis. In the following discussion of Figures 9A and 9B, references will be made to Figure 8.

The call-by-call procedure is invoked when the calling subscriber 40 * marks the subscriber PTN (step 302). The call is routed to the originating access switch 44 *, or "OAS", (step 304) and the OAS interrogates the NCP 66 * (step 306). The NCP returns the auxiliary addressing number (RNA) to the OAS, causing the call to be directed to the auxiliary 68 * by the terminating access switch 46 *, or "TAS A", (step 308). The terminating access switch passes the calling number, determined through the ANI, and the calling PTN to the auxiliary (step 310). The auxiliary then retrieves the subscriber record based on the marked PTN (step 312) and determines whether the subscriber has provided a PIN to be collected from the calling subscriber (step 314). If a PIN has been provided, the auxiliary 68 * plays a signal and collects the DTMF digits (step 316). If a PIN has not been provided, the procedure jumps to step 318 which will determine if the subscriber is busy (ie, if a subscriber call by the auxiliary is in progress). If the subscriber is busy, the next step is to verify if the subscriber has Call Waiting (step 320). If the subscriber does not have Call Waiting, the call is directed to final processing, such as Voice Mail (step 402). If the subscriber has Call Waiting, the subscriber is located, the radiolocation signal includes the radio locator code, call number (or PIN), source telephone bandwidth, originating telephone protocol and a caller ID (step 404). if the subscriber does not respond to the location within a predetermined time after it is sent (step 405) the calling party is "terminated" and the call is directed to final processing (step 406). The subscriber can respond within the allotted time when initiating transmission of a termination number (or "range") bandwidth and protocol; or a conference call instruction (step 428). In the event that a subscriber responds within the allotted time, the processing of the call continues according to the steps following step 428. If it is determined in step 318 that the subscriber is not busy, the auxiliary 68 * determines whether the subscriber is taking calls or not (step 322). If the calls are not accepted, the call is directed to final processing (step 408). Otherwise, the assistant retrieves the subscriber page code (step 410) and transmits the radio locator code, call number (or PIN) and call identifier to the radiolocation service (step 412). The radiolocation service then broadcasts the information (step 414) to the pager 77 *, which alerts the subscriber and displays the call number (or PIN), the caller ID and, if available, the bandwidth and protocol of the station. of call (step 416). At this point, the subscriber can accept or reject the call (step 418). There are two ways in which the subscriber can reject the call. The subscriber can do nothing, in which case the calling subscriber will run out of time (step 420) and the assistant will direct the call to final processing (step 416). Or, the subscriber can send a rejection signal (a special instruction) to the radiolocation service (step 422) in which case the radiolocation service will retransmit the rejection signal to the auxiliary (step 424) and the auxiliary will cause the call to be directed to final treatment (step 426). If the subscriber chooses to take the call, the subscriber initiates the transmission of a number to reach, bandwidth and protocol by means of a two-way radiolocation 77 * (step 428). In this way, the subscriber can transmit either a number to reach it, bandwidth and protocol; or a conference call instruction of step 428 of the process. Upon receiving a number, bandwidth and protocol, the radiolocation service transmits the information and the call identification to the auxiliary (step 430). Next, the auxiliary checks whether another call is currently active from the subscriber (step 432).

In the event that a call is currently active, the auxiliary checks to see if a conference call instruction was received (step 435). If a conference call instruction was not received, the auxiliary puts the active call on (step 434) and bridges / merges the new call to the subscriber (step 436). If a conference call instruction was received, the auxiliary bridges / merges the new call to both the subscriber and the original called subscriber (step 437). In the event that no other currently active call is found, step 434 is skipped and the auxiliary bridges / merges (step 436) the new call to the subscriber immediately after step 432. The procedure is completed by bridging / merging the call ( stage 438). Again with reference to Figure 6, the auxiliary 73, switch 47, communication links 45, 49, 75, and wireless link 87, function in the same way as counterpart elements in Figure 8 (see auxiliary 68 *, switch 46 *, communication link 48 *, 80 * , 82 *, and wireless link 88 *). When the call reaches switch 44, switch 44 interrogates NCP 66 which in turn interrogates CRP 68 for instructions. If the subscriber has only subscribed to the registration-type service, the call can be handled in accordance with the procedures established in connection with Figure 5. However, if the subscriber has subscribed to available features only through the call-type service -by-call, such as the conference call feature, the CRP directs the switch 44 to send the call to the auxiliary 73. Once the call has been redirected to the auxiliary, the auxiliary can handle the call according to the procedures established in connection with Figures 9A and 9B. In this way, both the record-like and call-by-call service can be offered through a configuration of Figure 6. As is an aggregate feature of the preferred embodiment of Figure 6, the auxiliary 73 is coupled to the CRP 68 by the communication link 71. Accordingly, when the CRP directs a call to the auxiliary, the auxiliary can interrogate the CRP for the subscriber registration and the current status information. In this way, the CRP can act as the database from which the assistant retrieves the necessary radiolocation information to implement call-by-call addressing. In addition to the "registration" and "call-by-call" described above, the preferred mode is capable of directing calls according to a "subsequent addressing" method, a "reverse calling" procedure and a "call examination" procedure.

The subsequent addressing procedure is used to direct calls that have already been directed according to one of the other procedures. To initiate subsequent addressing, the subscriber employs the two-way pager to transmit a subsequent addressing signal to the radio location service. The subsequent addressing signal includes subsequent call control parameters, for example a subsequent termination number, a subsequent bandwidth and / or subsequent protocols. These subsequent parameters may be different from those used to initially direct the call. The network uses the subsequent parameters to "readjust" the call when it is completed to the subsequent station to better adapt the call to the desired subsequent parameters. The subsequent addressing signal also includes a subsequent addressing indicator. The subsequent addressing indicator serves to distinguish the subsequent error signal from a "record update". The two types of signals must be distinguished, since the subsequent increase requires that immediate redirection action be taken, in contrast to a registry update, which does not require any immediate action, but instead configures an address that will be carried out at some later time. When the subsequent addressing signal is received before the original call is completed, the CRP, or auxiliary, whatever the case may be, redirects the call in the same way that an initial call is routed. When a subsequent redirect signal is received after the original call has been answered, the original call may be terminated before redirecting. Figure 10 is a flow diagram showing how subsequent addressing is implemented in the preferred embodiment of Figure 6. By definition, subsequent addressing occurs after a call has been initially addressed (step 1002). A subsequent addressing signal may be received at any time after the initial addressing. In this way, the system continuously checks to check if this signal has been received (step 1004). If a subsequent addressing signal is not received, the call routing proceeds as is normal, that is, the system checks to verify if the call has been answered (step 1012) and whether the calling subscriber and the subscriber can engage in conversation (step 1014). If a subsequent addressing signal has been received, then a series of steps is taken. First, the CRP (or auxiliary) sends a message containing the termination number, bandwidth and subsequent protocol to the NCP (step 1006). Next, the NCP passes the subsequent termination number, bandwidth and protocol to the network switch (step 1008). Finally, the network switch redirects the call (step 1010). As an alternative to steps 1006, 1008 and 1010, the assistant can redirect the call without involving the NCP or CRP. In any case, following the redirect, but before the call is terminated, another subsequent addressing signal may be received. In this way, an answered call is verified for termination (step 1016). If the call has not ended, the system continues to check for subsequent addressing indications (step 1018). If the call has ended, the subsequent addressing procedure loop is exited (step 1020). The reverse calling procedure is invoked when a subscriber chooses to initiate a call from the desired terminating station, instead of transmitting the terminating station number and then waiting for the call to be answered. This procedure can be used, for example when the telephone number of the desired termination stations is unknown. To implement the revertive call, the routing signal sent by the subscriber includes a revertive call indicator instead of a termination number. The indicator tells the network to put on hold any incoming calls addressed to the subscriber and waits for a return call from the subscriber. After the subscriber places a return call from the desired terminating station, the return call and the incoming call are bridged (or merged) to direct the call from the subscriber calling the subscriber. In addition to the revertive call indicator, the subscriber may include in the addressing signal, the bandwidth and protocol of the telephone station from which the subscriber plans to dial the return call. In any case, the revertive call may be of the "call-by-call" type, where the subscriber provides a revertive call indicator, in response to a location or of the "record" type where a revertive call indicator is searched of CRP (or auxiliary) without first radiolocalizing the subscriber. The call examination procedure is invoked when a subscriber chooses that the network automatically directs incoming calls to a call party communication device more capable of supporting the calling party's communication device. In this procedure, the addressing signal only requires to include a location indicator, which is associated with a location where one or more call party communication devices are present. The parameters of the call communication device such as bandwidth and protocol, for each of the so-called possible party communication devices associated with the location, are stored in the CRP (or auxiliary) in a previously arranged base. The routing of a call through a call exam proceeds as follows. When initiating a call to a subscriber, the network notices that a subscriber location indicator has been received - either through a "registration" or "call-by-call" service. The network then "examines" the call to determine the parameters of the calling party's communication device (eg, bandwidth and protocol of the caller's communication device). This test is known in the art; and in light of this description, applying this examination in the present invention will be apparent to a person skilled in the art. Once the call has been examined, and the parameters of the calling party's communication device have been determined, the network compares them with parameters of the call party communication devices for the given location. The call is directed to the called party communication device that is in the determined location and has parameters that correspond more closely to those of the caller's communication device. Parameter matching can be done through the use of an algorithm, lookup table or any other well-known method. The call-by-call, reverse call, and call screening procedures discussed above require that an alert radiolocation message be sent to the subscriber and that the network maintain the incoming call while awaiting the subscriber's response. However, in those situations in which the subscriber has switched off his / her pager, the subscriber does not bring the pager, the pager is out of range or the pager battery is depleted, the pager is "unreachable". In this way, the alert radiolocation message will not be received and a response will not be sent. To take these situations into account, a pager status feature is included in a preferred embodiment of the invention. The pager state feature will be described below in the context of call-by-call addressing. From the description, the implementation of the feature in the other procedures will be apparent to a person skilled in the art. Figure 11 is a flowchart showing the additional call routing steps that must be carried out when the call-by-call addressing service of the present invention includes a pager status feature. The steps illustrated in the flowchart are the same as those illustrated in the flow chart of Figure 9a, except that a pager status branch is included, consisting of three stages (steps 313, 315 and 317). In accordance with the call-by-call addressing procedure previously described, step 312 involves recovering the subscriber record. When a pager status feature is implemented, this record includes an indication of whether or not the pager is reachable. To generate this indication, the radiolocation service itself or in response to a request from the network, may periodically interrogate the pager using a radio-localization message to which the two-way pager must respond automatically, that is, it shall respond without requiring any intervention of the user. The result of the radiolocation service interrogation is placed in the subscriber's register and serves as the status indicator. Following recovery of the subscriber record, the network determines whether the pager is achievable (step 313). If the pager is achievable, call-by-call routing processing proceeds as usual, continuing with step 314. If the pager is not reached, the incoming call is routed to a predefined station that is associated with a number. predefined, such as the most recently registered termination number or a voice mail number (step 315). In this way, an alert radiolocation message is not sent to a pager that can not be reached. After redirecting to the predefined number, the processing of calls to a subscriber with a pager that is not reached is complete (step 317). In a preferred embodiment, the two way pager is equipped with an "automatic disconnect" switch. In an implementation of an automatic disconnect switch, which is suitable for use in the present invention, a body temperature sensor is coupled to the radiolocator, such that when the pager is removed from the subscriber's person, the detector senses a temperature reduction and triggers the pager's disconnect switch. In this way, when the subscriber does not use the pager, the pager automatically turns off and remains unreachable. In this way, the automatic disconnect switch prevents location messages from being sent to a subscriber who is not likely to receive the message because the subscriber does not bring the pager. As an added feature, before turning off, the pager can initiate the transmission of a notification signal to the network, indicating that the pager is not reached. When this feature is employed, the network is immediately notified that the subscriber is not transporting the pager, and thus there is no intermediate interrogation period during which an unused paging message may be sent.

While the best mode for carrying out the invention has been described in detail, those familiar with the art to which the invention relates will recognize various designs and alternate embodiments for practicing the invention as defined by the following claims. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims (17)

1. CLAIMS 1. A method for directing a call that starts in a first communication device, characterized in that it comprises the steps of: a) determining a location indicator, the location indicator is associated with a location where one or more second devices of communication are present, each of the second communication devices has one or more parameters that are second parameters of communication devices; b) determining one or more communication parameters associated with the call; c) determining a better correspondence of one of the second communication devices in the location, based on the determined communication parameters; and d) direct the call to the one that best corresponds to the second communication devices.
2. 2. A method according to claim 1, characterized in that the step of determining a location indicator is performed upon receiving a location indicator from a subscriber.
3. 3. A method according to claim 2, characterized in that the reception is by a second call.
4. 4. A method according to claim 2, characterized in that the reception is by means of a two-way radiolocator.
5. 5. A method according to claim 1, characterized in that the step of determining a location indicator is performed by retrieving a location indicator from a database.
6. 6. A method according to claim 1, characterized in that one or more communication parameters associated with the call are different from a termination number.
7. 7. A method according to claim 6, characterized in that one or more communication parameters comprise a call bandwidth.
8. 8. A method according to claim 6, characterized in that one or more communication parameters is a call protocol.
9. 9. A method according to claim 1, characterized in that it further comprises the step of: storing information associated with each of the second communication devices with its location and its parameters.
10. A system for directing a call that starts in a first communication device, characterized in that it comprises: a) means for receiving a location indicator, the location indicator originates from a two-way radiolocation, and is associated with a location where one or more second communication devices are present; b) means for determining one or more communication parameters associated with the call; c) means for determining a second, more appropriate communication device at the indicated location, based on the determined communication parameters; and c) means for directing the call to the most appropriate second communication device.
11. 11. A system according to claim 10, characterized in that it further comprises: means for storing information associated with each of the second communication devices with its location and its parameters.
12. 12. A method for directing a call that is initiated in a first communication device, characterized in that it comprises the steps of: a) receiving a location indicator, the location indicator originates from a two-way radiolocation and associated with a location wherein one or more second communication devices are present, each of the second communication devices has one or more parameters that are second parameters of communication devices; b) determining one or more first communication device parameters, which are parameters that characterize the first communication device; c) choosing a particular of the second communication devices, located in said location, for which the parameters of the second communication device best correspond to the parameters of the first corresponding communication device; and d) direct the call for the second communication device that best corresponds.
13. 13. A method according to claim 12, characterized in that it further comprises the step of: storing information associating each of the second communication devices with its location and its parameters.
14. A system for directing a call that is initiated in a first communication device, characterized in that it comprises the steps of: a) means for receiving a location indicator, the location indicator originates from a two-way radiolocation and is associated with a location where one or more second communication devices are present, each of the second communication devices has one or more parameters of the second communication device; b) means for determining one more parameters of the first communication device, which are parameters that characterize the first communication device; c) means for choosing a particular of the second communication devices located in that location, for which the parameters of the second communication device best correspond to the parameters of the corresponding first communication device; and d) means for directing the call to the second communication device of best correspondence.
15. 15. A system according to claim 14, characterized in that it further comprises: means for storing information that associates each of the second communication devices with its location and its parameters.
16. 16. A method for directing a call that is initiated in a first communication device, characterized in that it comprises the steps of: a) receiving a location indicator, the location indicator originates from a two-way radiolocation and associated with a location wherein one or more second communication devices are present, each of the second communication devices has one or more parameters that are parameters of the second communication device; b) determining one or more communication parameters associated with the call; c) determining a second communication device of better correspondence at the indicated location, as a function of (i) the parameters associated with the call and (ii) the parameters of the second communication device; and d) direct the call to the second communication device that best corresponds.
17. 17. A method according to claim 16, characterized in that it further comprises the step of: storing information associating each of the second communication devices with its location and its parameters.