Wide-band telecommunication system interface

The subject of the invention is a method for controlling a telecommunications system, a telecommunications system and a signaling processing system for telecommunications calls, in particular between an asynchronous system and an integrated service digital network (ISDN).

The known structure of the local telecommunications access system is depicted in FIG. And drawing. It shows the client equipment (CPE) connected to the local switch. There is usually more equipment connected to each local switch, but for the sake of clarity, the number is limited. The standard connection between CPE equipment and the local switch is a known time-division multiplexed connection (TDM) using the Extended Super Frames (ESF) format. The TDM / ESP connection allows access to the local switch of more devices on the client side and obtaining a telecommunications service.

The TDM connection uses time division multiplexing to combine multiple communication routes into one digital signal. The ESF format uses signaling with bit taking. In signaling with bit taking, the individual bits of user information in the transfer channels are replaced with signaling information. Thus, these signaling bits are "picked up" from the utilizing transfer channels. In ESF format, the picked bits are known as ABCD bits. Because the ABCD bits integrate in the transfer channels, the signaling with the ABCD bit taking is a "in-band" signaling signal. Examples of information carried by ABCD bits are connection and disconnection states. The ESF format and ABCD bit-taking signaling are well known in the art.

The well-known digital format with integrated services (ISDN) provides the user with a digital connection with a local switch that has more bandwidth and control than a regular local loop. The ISDN format has transfer channels (B) and signaling channel (D), which are usually connected in a main ratio (23B + D) or in a basic ratio (2B + D). Because the ISDN format has a separate signaling channel (channel D), it has an out-of-band signaling system.

Broadband systems are currently being developed. Broadband systems have many advantages for telecommunications service providers, such as greater capabilities, more efficient use of bandwidth, and the ability to integrate voice, data and image transfer. Broadband systems give callers more options at lower costs. However, CPE equipment using the TDM connection format, ISDN format or similar formats cannot have direct access to broadband systems. These systems require a coupling interface for complex broadband systems. Telecommunications service providers also need such an interface to

188 182 use your broadband systems to provide services to CPE equipment that uses the ISDN format or a format that can be converted to the ISDN format.

The essence of the method of controlling the telecommunications system for telecommunications calls between the asynchronous system and the integrated service digital network (ISDN) is that call signaling is received in the signaling processor from the ISDN network and the asynchronous system, the signaling of the call signaling from the ISDN network is processed in the signaling processor. asynchronous system and at least one ISDN connection and asynchronous identifier are selected for each call, then control messages are provided that identify selected connections and identifiers from the signaling processor to the external multiplexer, and the multiplexer interfaces call communications between the ISDN network and the asynchronous system using selected connections and identifiers based on control messages.

Preferably, an asynchronous transmission mode system is used as the asynchronous system, and asynchronous transmission mode connections as the identifiers.

Preferably, start address messages are processed in the signaling processor during call signaling processing.

Preferably, the call communications are also converted to ISDN communications.

Preferably, call signaling from the ISDN network is converted in the signaling converter.

The essence of the telecommunications system for telecommunications calls between the asynchronous system and the integrated service digital network (ISDN) is that it includes a signaling processor processing call signaling from the ISDN network and from the asynchronous system selecting at least one ISDN connection and asynchronous identifier for each call and providing messages controls that identify selected connections and identifiers, and a multiplexer connected externally to the signaling processor receiving control messages from the signaling processor and coupling call communications between the ISDN network and the asynchronous system using selected connections and identifiers based on control messages.

Preferably, the asynchronous system is an asynchronous transmission mode system, and the identifiers are asynchronous transmission mode connections.

Preferably, the signaling processor is configured to process start address messages to select connections and identifiers.

Preferably, it includes an ISDN network converter attached to the multiplexer configured to convert call communications to ISDN communications.

Preferably, the SS7 signaling converter includes a signaling converter configured to convert the signaling between SS7 and non-SS7 formats.

The essence of the signaling processing system for telecommunications calls between the asynchronous system and the integrated service digital network (ISDN) is that it includes a signaling platform receiving call signaling from the ISDN network and asynchronous system, application platform processing call signaling from the ISDN network and asynchronous system and selecting at least one ISDN connection and asynchronous identifier for each call, and a control platform providing control messages that identify selected connections and identifiers to an external multiplexer, whereby the signaling platform and the control platform are connected with the application platform.

Preferably, the asynchronous system is an asynchronous transmission mode system and the asynchronous identifiers are connections of asynchronous transmission mode.

Preferably, the application platform is configured to process start address messages to select connections and identifiers.

Preferably also includes a transformation platform configured to transform call signaling from the ISDN network.

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The subject of the invention in the examples is shown in the drawing, in which Fig. 1 shows a block diagram of an example of the solution according to the invention, Fig. 2 is a block diagram of the next example of the solution according to the invention, Figures 3, 4, 5 and 6 show the message sequence diagrams in the solutions according to 7, 8, 9, 10, 11, 12, 13, 14 and 15 - block diagrams of the solutions according to the invention, Fig. 16 shows an example of a bus circuit table, Fig. 17 - example of the bus group table, Fig. 18 - example of the exception table, Fig. 19 - example of the ANI identification table, Fig. 20 - example of the called numbers table, Fig. 21 - example of the routing table, Fig. 22 - example of the processing table, Fig. 23 - an example of the message table, and pos. I - known structure of the local telecommunications access system.

Figure 1 is a block diagram of an example of a solution according to the invention. It shows CPE 210 and 212 equipment connected to the 2θ0 broadband system interface with 220 and 222 connections, respectively. CPE 210 and 212 equipment provides services to many communication devices at the customer's premises. Examples of these devices are computers, modems and faxes. Connections 220 and 222 are connections in the ISDN format or connections based on any format that can be converted to the ISDN format. A typical example is TDM connections using the ESF format. It should be noted that the broadband system interface 200 replaces the local switch with pos. AND.

Connection 230 and signaling link 232 are also shown. Connection 230 is a broadband connection, e.g., a synchronous optical network connection (SONET) carrying asynchronous transmission mode (ATM) cells. Other broadband connections are also known and can also be used. Signaling link 232 carries telecommunications signaling such as Signaling System # 7 (SS7) messages. Connection 230 and connection 232 are connected to a broadband group that represents any number of network elements, such as switches, extended platforms, and servers, for example.

The operation of broadband system 200 involves the conversion of transferring communications and signaling from one format to another. Transferring communications are user information, such as moving voice. Signaling is information used by the network, such as the number being called. In some embodiments, the conversion process is described by the term "interworking". For example, ISDN format signaling is coupled to SS7 signaling by transforming ISDN signaling to analogous SS7 signaling and converting SS7 signaling to analogous ISDN signaling. Communications transferring ISDN format are coupled with ATM communications, transforming ISDN transfer communications to similar ATM communications and converting ATM communications to analogous ISDN transfers.

The broadband system interface 200 accepts calls from connections 220 and 222. If the calls are not in ISDN format, they are converted to ISDN format. The ISDN D channel signaling is then converted to SS7 signaling. ISDN-carrying communications are converted to broadband communications. Broadband system interface 200 processes call signaling and selects the route for calls. Broadband system interface 200 can route calls to another broadband system interface 200 connected to CPE 210, 212. In addition, broadband interface system 200 can route calls via broadband connection 230 and corresponding signaling through 232. 230 and 232 can connect callers to multiple other networks and network elements that provide numerous services.

Thus, the broadband system interface 200 provides CPE 210, 212 access to the broadband system, wherein the broadband system 200 can accept calls in standard formats currently accepted by local switches.

Figure 2 shows a block diagram of a further solution according to the invention. The CPE 310 and 312 equipment are presented, as well as the 300 broadband system interface. The 300 broadband system interface is composed of an ISDN 340 converter, a multiplexer

188 182 ATM coupling (350), signaling processor 360 and SS7 362 converter. CPE 310 equipment is connected to ISDN 340 converter by connection 320. CPE 312 equipment is connected to ISDN 340 converter by connection 322. Multiplexer 350, signaling processor 360 and SS7 362 converter are connected via link 352. Multiplexer 350 and SS7 362 converter are connected via link 354. The signaling processor 360 and SS7 362 converter are connected via link 364. The multiplexer 350 is also connected to connection 330, and the signaling processor 360 is also connected to connection 332.

CPE 310 and 312 equipment can be any equipment that provides traffic that can be converted to ISDN. A typical example is a PBX system that provides TDM / ESF traffic. Usually, CPE 310 and 312 equipment is coupled with communication devices at the customer's premises and provide access to the network. CPE 310 and 312 equipment is connected to the ISDN 340 converter by connections 320 and 322. Connections 320 and 322 are any connections that can carry such communication. For example, they may be TDM / ESF connections that carry a multiplexed digital signal composed of multiple transfer channels that carry the caller's communications. Signaling bits, known as ABCD bits, are judged in the communications of the caller.

Connections 342 and 344 represent the ISDN connection, with connection 342 representing bearer communications (B channels) and link 344 representing signaling (D channel). Link 352 may be any link capable of carrying control messages. Examples of such a link are SS7, UDP / IP or TCP / IP in an ethemet network or a bus system using a conventional bus protocol. Link 354 is any link that can carry an ISDN D channel. An example is the Tl link with DS0 format elements carrying ISDN D channels. Links 332 and 364 are any links that can carry SS7 messages. SS7 connections are known. Connection 330 is an ATM connection.

The function of the ISDN 340 converter is to couple formats other than ISDN and ISDN formats. For example, if a TDM / ESF signal is received on connection 320, converter 340 will use signaling bits from ESF signal to create analogous ISDN signaling messages for ISDN D channel on connection 344. Transferring channels from connection 320 will be coupled with ISDN signal B channels on combined 342. Channels B and channel D are delivered to the multiplexer via connection 342 and connection 344, respectively. Connection 342 and connection 344 are logically separated, but may follow the same physical route. Devices with the basic functionality of the ISDN converter are known, but the skilled person will know how to adapt this functionality to the needs of the invention.

The function of multiplexer 350 is to receive a signal in ISDN format via connection 342 and link 344. Channels B from connection 342 and channel D from connection 344 are in the known DS0 format. The multiplexer 350 can combine any DS0 format with any other DS0 format. Multiplexer 350 combines elements of the DS0 link 344 format with elements of the DS0 format link 354 to provide the ISDN D channel from the ISDN converter 340 to the SS7 362 converter. The multiplexer 350 can also combine DS0 formats that carry carry communications. For example, a DS0 format element from CPE 310 equipment can be connected to DS0 format elements for CPE 312 equipment. Multiplexer 350 creates the last combination of DS0 and DS0 format elements in response to control instructions from the signaling processor 360 that are received on link 352.

The multiplexer 350 also has the function of converting the DS0 format into ATM cells with selected virtual route IDs / virtual channel IDs (VPI / VCI). This conversion is known as ATM coupling. ATM cells are sent via connection 330. They are usually delivered to an ATM cross connector that directs cells according to their VPI / VCI identifiers. Because DS0 formats are bi-directional, the associated VPI / VCI will usually be assigned to the selected VPI / VCI to get the call back to the caller. The multiplexer 350 will convert ATM cells from this accompanying VPI / VCI identifier to a DS0 return route. Multiplexer 350 performs DS0 / ATM conversions in response to control instructions from the signaling processor 360, which are received on link 352. A detailed description of the multiplexer is given below.

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The signaling processor 360 and converter 362 form a signaling processing system whose function is to receive and process ISDN signaling to select call connections. It is obvious that these elements can be integrated or they can remain separate blocks.

The SS7 362 converter combines ISDN signaling and Signaling System # 7 (SS7) signaling. The SS7 362 converter exchanges the D channel signaling with the ISDN 340 converter on links 344 and 354 (via multiplexer 350). The SS7 362 converter exchanges SS7 signaling with the signaling processor 360 on link 364. The SS7 converter also communicates with multiplexer 350 on link 352. An example of such communication is the instruction of providing a feedback tone to the initial side of the call. Devices with the basic functionality of the SS7 362 converter are known, and the skilled person will know how to adapt this functionality to the needs of the invention.

The function of the signaling processor 360 is signaling processing. The signaling processor 360 typically processes the SS7 start address message (IAM) for the call set up. The LAM message is processed by the signaling processor 360 to select a specific connection for a specific call. This connection can be DS0 or VPI / VCI. The signaling processor 360 sends link control instructions 352 to multiplexer 350, determining the selected connections. The signaling processor exchanges SS7 signaling on links 364 and 332. A detailed description of the signaling processor 360 is given below.

Figure 3 is a diagram of the message sequence. Fig. 3 shows the making of a call from CPE equipment to the unit within the country. The sequence begins by taking over the connection to the ISDN converter by CPE equipment. The ISDN converter detects the takeover and returns the dial tone. The CPE equipment then transmits multi-tone signaling tones (DTMF) indicating the number being dialed to the ISDN converter. The ISDN converter uses the DTMF signaling input to generate an ISDN set up message that sends to the SS7 converter via the multiplexer, whereby the multiplexer forwards all messages between the ISDN converter and the SS7 converter, the following description does not mention this transmission. The SS7 converter converts the ISDN set up message to an analogous SS7 IAM message and sends the SS7 IAM message to the signaling processor.

The signaling processor processes the IAM and selects a connection. For domestic calls, the connection will usually be made using the VPIWCI identifier provided to the long-distance network. The signaling processor will generate an SS7 LAM message to send to the appropriate network element, extending the call. The SS7 converter sends a continue ISDN call message back to the ISDN converter. The signaling processor will generate a control instruction determining the DS0 format and the VPI / VCI ID chosen to send to the multiplexer. When the other end receives all the information needed for the call, it will return the SS7 Address Complete Message (ACM) to the signaling processor. The signaling processor will send an SS7 reply message (ANM) to the SS7 converter that will send an analogous ISDN notification message to the ISDN converter.

If the called side responds, the signaling processor receives the ANM SS7 message from the other end. The signaling processor will send an SS7 ANM message to the SS7 converter and the SS7 converter will send an analogous ISDN connection message to the ISDN converter. At this point the call is connected and a conversation, fax transmission and so on can take place. The ISDN converter transforms the transfer channel from CPE equipment to ISDN DS0 format, and the multiplexer converts this DS0 format into ATM cells with the selected VPI / VCI identifier. In addition, the multiplexer converts ATM cells from the accompanying VPI / V CI identifier to a DS0 return route.

As a result, the caller has access to the ATM system. This is achieved by converting traffic from CPE equipment to ISDN. ISDN D channel signaling is converted to SS7 format. and ISDN B channels are converted into ATM cells. It is preferred if the connection

188 182 the virtual ATM is selected by the signaling processor on a call-by-call basis. This allows the signaling processor to select a virtual connection that has previously been delivered to the appropriate destination.

Figure 4 is a diagram of the message sequence for calling from a country unit to CPE equipment. The sequence starts with the signaling processor receiving an SS7 iAm message from the initial page of the call. The signaling processor processes the IAM message and selects the DSO destination. The signaling processor sends an IAM message to the SS7 converter, which forwards the corresponding ISDN set up message to the ISDN converter. The LAM message and statement message designates the selected DSO format to use when invoked. The ISDN converter ensures the takeover of the phone. The signaling processor also sends the control instruction to the multiplexer, indicating the VPI / VCI identifier and the selected DSO format element.

The ISDN converter will send an ISDN notification message to the SS7 converter, and the SS7 converter will send an analogous SS7 address completion message (ACM) to the signaling processor. The signaling processor will send an SS7 ACM message to the initial page of the call. The SS7 converter will send a control instruction to the multiplexer to provide a tone of the return signal to the initial side of the call, indicating to the caller that the called side is being notified, where appropriate, this may be a busy signal. The multiplexer will provide a feedback signal to the other party of the call.

When the ISDN converter detects that the phone has been answered, it will send an ISDN connection message to the SS7 converter, and the SS7 converter will provide an analogous SS7 ANM message to the signaling processor. The signaling processor will send an SS7 ANM message to the initial page of the call. The signaling processor will instruct the multiplexer to interrupt the feedback tone and connect the call. At this point the call is connected.

Figure 5 is a diagram of the message sequence for resetting a call when the CPE equipment of Figures 3 and 4 disconnects because the connected communication device disconnects. The ISDN converter will detect disconnection and send an ISDN disconnect message to the SS7 converter. The SS7 converter sends an analogous SS7 release finish message (REL) to the signaling processor. The signaling processor initiates the release procedures and sends an SS7 REL message to the other party of the combined call. In addition, the signaling processor sends instructions to the multiplexer to disconnect the DSO format element and VPI / VCI identifier. The signaling processor will then send an RLC SS7 message to the SS7 converter. The SS7 / ISDN converter will then send an ISDN release message to the ISDN converter, which will ensure that the loop opens for the CPE equipment. The other side will usually respond with an SS7 RLC message for the signaling processor. At this point the call is disconnected.

Figure 6 shows zeroing the call when the other party hangs up. The other side will send an SS7 REL message to the signaling processor and the signaling processor will initiate the release procedures for the call. The signaling processor will send an SS7 rEl message to the SS7 converter, and the SS7 converter will send an analogous ISDN disconnect message to the ISDN converter. The ISDN converter provides disconnection for a DSO format element and for CPE equipment. The signaling processor will send control instructions to the multiplexer to disconnect the DSO format element from the VPI / VCI identifier. The signaling processor will also send an SS7 RLC message to the other party. The ISDN converter will provide an ISDN release message to the SS7 converter. The SS7 converter will provide an analogous SS7 RLC message to the signaling processor, indicating that the connection has been reset for reuse. At this point the call is disconnected.

In the situation shown in Figs. 3 to 6, the ISDN converter is coupled to CPE equipment to enable the call. The ISDN converter also provides ISDN connections and signaling for the multiplexer. The multiplexer exchanges ISDN signaling between the ISDN converter and the SS7 converter. The multiplexer also couples DSO ISDN format elements

188 182 and ATM. The SS7 converter transforms the signaling between the ISDN format and the SS7 format and exchanges SS7 messages with the signaling processor. The signaling processor processes SS7 signaling and responds to the SS7 converter with SS7 messages. The signaling processor also sends commands to the multiplexer to simplify the call. This is usually assigned a DSO format element to the VPI / VCI identifier. The signaling processor also provides SS7 messages to the network as a whole. The multiplexer converts DSO format elements to asynchronous transfer (ATM) in response to signaling processor commands.

As a result, CPE equipment obtains an interface for a broadband system. The network can provide this interface and provide the selected connection in ATM mode on a call-by-call basis, without the need for an ATM mode switch. Such a system is much better than previous systems. The invention can be used for all CPE equipment protocols that can be converted to ISDN. In some embodiments, even the CPE equipment alone can provide ISDN format traffic.

Figures 7 to 11 show various alternative versions of the solutions of the invention, but the invention is not limited to them. It will be apparent to those skilled in the art that the modifications of Figures 7 to 11 can be combined in a variety of different arrangements, all of which are considered to be in accordance with the invention.

Figure 7 shows the 800 broadband system interface, which consists of multiplexer 850, links 852 and 854, and signaling processor 860. Also shown is link 832 and connections 820, 822 and 830. These components are configured and operate the same as described above for of the respective reference numbers in Fig. 2, except that the ISDN converter was included in the multiplexer 850 and the SS7 converter was included in the signaling processor 860.

Figure 8 shows the interface of broadband system 900, which consists of multiplexer 950, links 952 and 954, and signaling processor 960. Also shown is link 932 and connections 920, 922 and 930. These components are configured and operate as described above for the corresponding reference numbers in Figure 2, except that the ISDN converter and the SS7 converter have been incorporated into the 950 multiplexer.

Figure 9 shows the broadband system interface 1000, which consists of multiplexer 1050, links 1052, 1054 and 1064, signaling processor 1060 and converter SS7 1062. Also shown is link 1032 and connection 1030. These components are configured and operate the same as described above for Fig. 2, except that the ISDN converters have been moved outside of the 1000 system. For example, they can be placed at the customer. The ISDN 1014 converter is connected to CPE 1010 equipment, and the ISDN 1016 converter is connected to CPE 1012 equipment by ESF connections. Connections 1020 and 1022 carry B channels, and links 1021 and 1023 carry D channels. Multiplexer 1050 is coupled to converters 1014 and 1016 through these connections. In this way, the invention provides ISDN systems with an interface with a broadband system. For the purposes of the invention, ISDN signaling is converted to SS7 signaling before it is processed by the signaling processor.

Figure 10 shows the 1100 broadband system interface, which consists of the 1150 multiplexer, links 1152, 1154 and 1164, the signaling processor 1160 and the SS7 1162 converter. The connection 1130 and the connection 1132 are also shown. These components are configured and operate the same as described above for the numerical equivalents of Fig. 2. In this embodiment, CPE 1110 and 1112 may provide ISDN format traffic, so you can skip the ISDN converter and conversion processes. Connections 1120 and 1122 carry B channels, and links 1121 and 1123 carry D channels. Multiplexer 1150 is directly coupled to ISDN CPE U 10 and 1112 equipment. Thus, the invention provides ISDN systems with a broadband system interface. For the purposes of the invention, ISDN signaling is converted to SS7 format before it is processed by the signaling processor.

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Figure 11 shows the 1200 broadband system interface, which consists of a 1250 multiplexer, 1244, 1252, 1254 and 1264 links, a signaling processor 1260 and an SS7 1262 converter. Also shown is link 1232 and connections 1220, 1222, 1242 and 1230. These elements are configured and operating in the same way as described above for their counterparts in Fig. 2, except that the ATM 1280 through connector and ATM 1282 connection are included. The ATM 1280 through connector is a conventional ATM cross connector. The ATM 1280 cross connector provides many previously prepared VPI / VCI IDs for the multiplexer via the ATM 1250 connection. These VPI / VC1 identifiers can be prepared via the ATM 1280 cross connector for many destinations. Examples are switches, servers, extended platforms, client hardware and other multiplexers. The inclusion of a 1280 cross connector illustrates how the selection of a VPI / VCI identifier by a call-by-call signaling processor enables the 1200 broadband system interface to route calls to selected destinations through prepared broadband connections.

This call-by-call selection and use of virtual connections is achieved without the need for an ATM switch and call-by-call control via a cross-connector. This is a significant advantage over current ATM switch systems in terms of cost and control. ATM mode switches are usually very expensive, and switch control is left to the switch supplier. According to the invention, the control carries out a signaling processor.

Figure 12 shows an embodiment of a multiplexer that is suitable for the present invention, but other multiplexers that meet the requirements of the invention may be used. The control interface 1350, interface DS0 1355, digital signal processor 1356, adaptation layer ATM (AAL) 1357 and interface SONET 1358 are shown. The interface SONET 1358 accepts ATM cells from the AAL 1357 layer and sends them via a 1330 connection. Connection 1330 is a SONET connection, such as the OC-3 connection. The control interface 1350 exchanges control messages between the signaling processor, the signaling converter and the multiplexer components via link 1352.

The DS0 1355 interface receives an ISDN signal on link 1342 and connection 1344. The DS0 1355 interface connects the incoming D DS0 link 1142 with the D DS0 link 1154 to the SS7 converter. The DS0 1355 interface receives DS0 format B channel elements and processes them according to the signaling processor instructions received through the 1350 control interface. This includes combining individual DS0 format elements with other DS0 format elements for each call. This also includes combining individual DS0 format elements with the individual features of the 1356 digital signal processor. This also includes bypassing the 1356 digital signal processor and directly combining elements of the DS0 format with the AAL 1357 layer.

The function of the 1356 digital signal processor is to use different digital processes for individual components of the DS0 format in response to control instructions received via the 1350 control interface. Examples of digital processing include: tone detection, tone transmission, feedback loops, voice detection, voice prompts, echo cancellation, compression and encryption. For example, the signaling processor may order the multiplexer to provide a feedback tone and then turn off the echo.

The 1356 digital signal processor is connected to the AAL 1357 layer. The AAL 1357 layer includes a convergence sublayer and a segmentation and reassembly (SAR) layer. The function of the AAL 1357 layer is to accept calls in DS0 format and convert information from DS0 to ATM cells. The AAL layer 1357 obtains the virtual route identifier (VPI) and virtual channel identifier (VCI) for each call from the 1350 control interface. The AAL layer 1357 also obtains the DS0 format identifier for each call (or multiple DS0 for Nx64 calls). The control interface 1350 receives these instructions from the signaling processor. Then, AAL 1357 transforms user information between the designated DS0 format element and the designated ATM virtual connection. Confirmations that assignments have been completed can be sent back to the signaling processor if desired. Calls at a bit rate

188 182 being a multiple of 64 kbit / second are known as Nx64 calls. If desired, the AAL 1357 layer may be able to receive control messages through the 1350 control interface for Nx64 calls. The signaling processor would instruct AAL 1357 to group DSO format elements for the call.

As discussed above, the multiplexer also supports calls in the opposite direction - from the SONET 1358 interface to the DSO 1355 interface. VPI / V CI has already been selected for this traffic and the traffic has been routed through a cross connector. As a result, AAL 1357 only needs to designate a DSO format element for this specific VPI / VCI. The signaling processor can provide this assignment through the control interface 1350 to layer aAl 1357.

DSO connections are bi-directional and ATM connections are usually unidirectional. As a result, two virtual connections in opposite directions will usually be required for each DSO format element. It is obvious to the skilled person that, for example, the broadband system can be equipped with a second set of VPI / VCI identifiers in the opposite direction to the initial set of VPI / VC1 identifiers. In each call, the multiplexer would be configured to automatically call that second VPI / VCI to provide a two-way virtual connection to be compatible with the two-way DSO format on the call.

In some embodiments, the 1356 digital signal processor with 5 ^ υην nnutifdt ^^ lksiera can be omitted. In these examples, the ^ ^ ^ ^ ^ 5 ^ (2i 'could not get digits or control echo. The DSO 1355 interface would directly connect DSO format elements to the AAL 1357 layer.

In some embodiments, the function of combining DSO format elements with DSO elements of channel B may be omitted. DSO element of channel D would still be connected, but if the DSO element of channel B required connection with another DSO element of channel B, the signaling processor would have to choose the VPI / VCI identifier was previously prepared through a cross connector and returned to the same multiplexer. Then the multiplexer would transform the returning cells into another DSO format element.

As a result, CPE equipment with an interface for a broadband system is provided. The network can provide this interface and provide the selected ATM connection on a call-by-call basis, and no ATM mode switch is required. Such a system is much better than previous systems. Although the invention has been described in terms of the ESF format, it will be apparent to those skilled in the art that the invention can be used for other protocols that can be converted to ISDN. Even CPEs alone can provide ISDN traffic. The invention requires that signaling be converted from ISDN to SS7 before it is processed by the signaling processor.

The signaling processor is called a call / connection manager (CCM) and receives and processes telecommunications call signaling and control messages to select connections that constitute communication routes for calls. In a preferred embodiment, the CCM processes SS7 signaling to select connections for the call.

In addition to dialing connections, CCM performs many other functions in the context of call processing. Not only can it control routing and select real connections, but it can also approve callers, control echo switches, generate billing information, call intelligent network functions, access remote databases, manage traffic and balance network loads.

Figure 13 shows the CCM manager version. Other versions are also being considered. In the embodiment of Figure 13, CCM 1400 controls an ATM coupling multiplexer that couples a DSO format element and a VPI / VCI identifier. However, the CcM manager can control other communication devices and connections in other embodiments.

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The CCM 1400 includes signaling platform 1410, control platform 1420 and application platform 1430. Each of the platforms 1410, 1420 and 1430 is connected to other platforms.

The signaling platform 1410 is connected externally to SS7 systems, in particular to systems having a message transfer part (MTP), ISDN user part (ISUP), signaling connection control part (SCCP), part of an intelligent network application (INAP) and part of application of transaction functions ( TCAP). The 1420 control platform is externally connected to multiplexer control, echo control, resource control, billing and functions.

The 1410 signaling platform has MTP levels 1-3, ISUP, TCAP, SCCP and INAP functions and can send and receive SS7 messages. The ISUP, SCCP, INAP and TCAP functions use the MTP part to send and receive SS7 messages. Together, this function is called the "SS7 stack" and is known.

The 1420 control platform consists of various external interfaces, including multiplexer interface, echo interface, resource control interface, billing interface and function interface. The multiplexer's interface exchanges messages with at least one multiplexer. Messages include DSO format item assignments to the VPI / VCI identifier, acknowledgments, and status information. The echo control interface exchanges messages with echo control systems. Messages exchanged with echo control systems may contain instructions for enabling or disabling echo cancellation in specific DSO elements, acknowledgments, and status information.

The resource control interface exchanges messages with external resources. Examples of such resources are devices that implement continuity testing, encryption, compression, tone detection / transmission, voice detection and voice prompts. Messages exchanged with resources are instructions on how to use the resource for a particular DSO, confirmation and status information. For example, the message may instruct the continuity testing resource to provide a loopback or send and detect a tone for the continuity test.

The billing interface transfers billing information to the billing system. Typical billing information includes pages for the call, call times, and any special functions used for the call. The functional interface allows you to configure and control CCM 1400.

The function of application platform 1430 is to process signaling information from signaling platform 1410 to select connections. Selected connection identifiers are provided to the 1420 control platform for the multiplexer interface. The 1430 application platform is responsible for approving, translating, routing, calling control, exceptions, screening and error handling. In addition to meeting the control requirements for the multiplexer, the 1430 application platform also meets the requirements for echo control and resource control for the appropriate interface of the 1420 control platform. In addition, the 1430 application platform generates signaling information for transmission via signaling platform 1410. Signaling information can be ISUP, INAP or TCAP messages for external network elements. The information relating to each call is stored in the call control block (CCB) for the call. The CCB can be used for monitoring and for calling billing.

The 1430 application platform works in accordance with the Basic Calling Model (BCM) as defined by the International Telecommunications Union (ITU). A BCM instance is created to handle each call. The BCM model includes the initial process and the final process. The application platform 1430 includes a service switching (SSF) function that is used to call the service control function (SCF). The SCF function is usually included in the service control point (SCP). Queries are sent to the SCF as TCAP or INAP messages. Initial and final processes will have access to remote databases with intelligent network (IN) functions through the SSF function.

Software requirements for the 1430 application platform can be provided in the specification and description language (SDL). The SDL specification can be converted to C code

188 182 way, you can include additional C and C ++ code to create the environment. The CCM 1400 manager can be composed of the software downloaded to the computer described above.

In Fig. 13 it can be seen that application platform 1430 processes signaling information to control various systems and simplify call connections and services. SS7 signaling is exchanged with external components via the 1410 control platform, and control information exchanged with external systems via the 1420 control platform. Preferably, the CCM 1400 is not integrated with the switch CPU which is connected to the switching board. CCM 1400 can process ISUP messages regardless of TCAP queries.

The designations for the various SS7 messages are shown below:

ACM address completeness message

ANM response message

BLO blocking

BLA block confirmation

CPG call duration

CRG load information

CGB blocking circuit group

CGBA confirmation blocking the circuit group

GRS resetting the circuit group

GAME confirmation of resetting the circuit group

CGU unblock circuit group

CGUA confirmation of unlocking the circuit group

CQM query group circuit

CQR response to a circuit group query

CRM circuit reservation message

CRA confirmation of circuit reservation

CVT circuit validation test

CVR circuit approval approval

CFN disruption

COT continuity

CCR request continuity check

EXM output message

INF information

INR request information

IAM start address

LPA loopback confirmation

PAM forwarding

REL exemption

RLC termination of release

RSC circuit reset

RES resume

SUS suspension

UBL unlocking

UBA unlock confirmation

UCIC not equipped with circuit identification code

Call processing usually has two aspects. First, the incoming or "initial" call is recognized by the initial call process. For example, the initial connection that the call uses to enter the network is the initial connection on that network. Secondly, the outgoing or "end" connection is selected by the final call process. For example, the end call is coupled to the initial call to extend the call on the network. These two aspects of call processing are called the first page of the call and the last page of the call.

Figure 14 shows the data structure used by the application platform 1430 to implement the BCM model. This is achieved through a series of tables that point to each other in different ways. Indicators usually consist of the symbols for the next function and the next index. The next function points to the next table, and the next index indicates the position or range of entries in this table. The data structure has a bus circuit table 1500, bus group table 1502, exception table 1504, automatic number identification table (ANI) 1506, called number table 1508 and routing table 1510.

The 1500 bus circuit table contains information regarding connections. Usually the connections are DSO or ATM mode connections. First, the 1500 bus circuit table is used to retrieve the initial connection information. Later, a table is used to retrieve information about the end connection. When the initial connection is processed, the bus group number in the bus circuit table 1500 indicates the bus group used for the initial connection in the bus group table 1502.

Bus group table 1502 contains information related to start and end bus groups. When the initial connection is processed, the bus group table 1502 provides information regarding the bus group for the initial connection and usually points to the 1504 exception table.

The exception table 1504 is used to identify various exception conditions related to a call that may affect routing or other call handling. Usually, the 1504 exception table points to the ANI 1506 table. However, the 1504 exception table can directly point to the bus group table 1502, the called number table 1508, or routing table 1510.

The ANI 1506 table is used to identify any special features relating to the caller's number. The caller's number is generally known as automatic number identification (ANI). The ANI 1506 table usually points to the called 1508 table. The ANI 1506 table can, however, point directly to the bus group table 1502 or routing table 1510.

Called number table 1508 is used to identify routing requirements based on the called number. This is the case with standard telephone calls. Called number table 1508 usually points to routing table 1510. However, it may point to bus group table 1502.

Routing table 1510 contains information related to call routing for various connections. Routing table 1510 is entered from the pointer in exception table 1504, table ANI 1506, or called number table 1508. Routing table 1510 usually points to the bus group in the bus group table 1502.

When exception table 1504, table ANI 1506, call number table 1508, or routing table 1510 point to bus group table 1502, they ultimately select the end bus group. When the end connection is processed, the bus group number in the bus group table 1502 indicates the bus group that contains the end connection used in the 1502 bus circuit table.

The terminating bus circuit is used to extend the call and usually contains a VPI / V CI or DSO format element. So you can see that by going through the tables you can choose the end connection for the call.

Figure 15 is an extension of Figure 14. The tables of Figure 14 are shown, but their indicators are omitted for clarity. Fig. 15 shows additional tables that can be accessed from the tables of Fig. 14. These include the CCM 1600 table, processing table 1604, query / response table 1606, and message table 1608.

The CCM 1600 ID table contains various point codes of the CCM SS7 format. It can be accessed from the bus group table 1502 and points back to the bus group table 1502.

Processing table 1604 identifies various special actions to be taken within

188 182 call processing. This will usually cause the release message (REL) and causal value to be transmitted. Access to the 1604 processing table can be accessed from the bus circuit table 1500, bus group table 1502, exception table 1504, ANI table 1506, call number table 1508, routing table 1510 and query / response table 1606.

The 1606 query / response table contains information used to invoke the SCF. Access to it can be obtained by bus group table 1502, exception table 1504, table ANI 1506, call number table 1508 and routing table 1510. Points to bus group table 1502, exception table 1504, table ANI 1506, call number table 1508, routing table 1510 and processing table 1604.

Message table 1608 is used to provide instructions for messages from the call end page. Access to it is via bus group table 1502 and it points to the bus group table 1502.

Figures 16 to 23 show examples of the various tables described above. Fig. 16 shows an example of a bus circuit table. First, a bus circuit table is used to access the start circuit information. In later processing, it is used to provide information about the final circuit. For the processing of the starting circuit, the relevant point code is used to enter the table. This is the point code of the switch or CCM associated with the start circuit. For end circuit processing, the bus group number is used to enter the table.

The table also contains the circuit identification code (CIC). The CIC code designates a circuit, which is usually a DSO format element or VPI / VCI identifier. Thus, the invention may map the SS7 CIC code to the ATM mode VPI / VCI identifier. If the circuit is a circuit operating in ATM mode, the virtual route (VP) and virtual channel (VC) can also be used for identification. The group element number is the numerical code used to select the end circuit. The equipment identifier identifies the location of the equipment associated with the start circuit. The echo cancellation (EC) identification position identifies the echo switch for the start circuit.

The other fields are dynamic in that they are filled during call processing. The echo control position is filled out based on three fields in signaling messages: the echo suppressor indicator in IAM or CRM messages, the echo control device indicator in ACM or CPM messages and the possibility of transmitting information in the IAM message. This information is used to determine if echo control is required when called. The satellite indicator is filled with the satellite indicator in IAM or CRM messages. It can be used to reject a call if too many satellites are used. Circuit status indicates whether the circuit is idle, blocked or not blocked. Circuit state indicates the current state of the circuit, for example active or transient. Time / date indicates when the idle circuit has become idle.

Figure 17 shows an example of a bus group table. During initial processing, the bus group number from the bus circuit table is used as the key to the bus table. Lighting resolution indicates how to resolve the lighting situation. Lighting is a double occupation of the same circuit. If the lighting resolution position is set to "even / odd", the network element with the higher point code controls the even circuits, and the network element with the lower point code controls the odd circuits. If the lighting resolution position is set to "all", the CCM manages all circuits. If the lighting resolution is set to "none", the CCM will turn off. The continuity check position gives the percentage of calls requiring continuity testing on the bus group

Common language place identifier (CLLI) entry is a Bellcore entry. The position of the satellite bus group indicates that the bus group uses the satellite. The position of the group of the satellite bus is used in conjunction with the described wy16

188 182 with the satellite pointer field to see if the call was using too many satellite links and must therefore be rejected. The service indicator indicates whether the incoming message is from the CCM (ATM) or the switch (TDM). The outbound message index (OMI) points to a message table so that outbound messages can get parameters. The relevant WT position of the number plan area (NPA) designates the area code.

The selection sequence indicates the methodology that will be used to select the connection. The selection sequence field indications indicate the bus group to select circuits based on, least idle, most idle, ascending, descending, clockwise and counterclockwise. The stroke counter is reduced according to the IAM message. If the stroke count is zero, the call is released. Active automatic load control (ACC) indicates whether load control is active or not. If automatic load control is active, the CCM may release the call. During post-processing, the next function and index is used to enter the bus circuit table.

Figure 18 shows an example of the exception table. The index is used as a pointer to enter the table. The operator selection identifier (ID) parameter indicates how the caller reached the network and is used to route certain types of calls. The following is used for this field: bypass or no indication, the selected operator identification code pre-occupied and entered by the calling party, the selected operator identification code pre-occupied and no entry indication by the calling party, and the selected operator identification code not pre-occupied and entered by the calling party. The identifier indicates the network that the caller wants to use. It is used to route calls directly to the desired network. The form of the calling party's address number differs between 0 +, 1+, test calls and international calls. For example, international calls can be directed to the previously selected international operator.

The "digits from" and "digits to" the called party concentrate further processing unambiguously on a specific range of called numbers. The "digits from" field is a decimal number between 1-15 digits. It can be of any length and if it is filled with less than 15 digits, it is filled with zeros for the remaining digits. The "digits to" field is a decimal number between 1-15 digits. It can be of any length and if it is filled with less than 15 digits, it is filled with nines for the remaining digits. The next function and next index entries point to the next table, which is usually the ANI table.

Figure 19 shows an example of the ANI table. The index is used to enter the table fields. The calling party category varies depending on the types of calling parties, for example, test calls, emergency calls, and normal calls. The address form of the calling party's position / load number indicates how to obtain automatic number identification (ANI). The table fills in this field are given here: unknown, unambiguous subscriber numbers, ANI identification not available or not provided, unique national number, called ANI identification of the called party, not attached ANI identification of the calling party, identification of the ANI calling page containing the national number, ambiguous number subscriber, ambiguous national number, ambiguous international number, test line test code and other parameter values.

"Digits from" and "digits to" focus further processing on the identification of ANI in a given range. The data item indicates whether the ANI identification represents a data device that does not require echo control. The start line information (OLI) differs depending on the ordinary subscriber, multi-person line, ANI identification failure, station level size, special operator service, automatic designated forward call, coin or non-coin calls with data access, service call 800/888 , coin calls, prison / boarder services, takeovers (clean, problematic and regular), calls served by the operator, long range external telecommunications service, communication forwarding service

188 182 (TRS), cellular services, private payee exchanges and access to service types in a private virtual network. The next function and the next index point to the next table, which is usually the called number table.

Figure 20 shows an example of the called number table. The index is used to enter the table. The form of the number of the called address position indicates the type of number selected, for example national or international. The "digits from" and "digits to" positions clearly focus further processing on a certain range of called numbers. The processing takes place according to the logic of processing the "digits from" and "digits to" fields in Fig. 8. The next function and the next index point to the next table, which is usually the routing table.

Figure 21 shows an example of a routing table. The index is used to enter the table. The Network Identification Plan (ID) of the transition network selection (TNS) indicates the number of digits to use for the CIC code. The "digits from" and "digits to" fields for selecting an interim network specify the range of numbers to be designated by the international operator. The circuit code indicates whether an operator is needed on the call. The next function and next index entries in the routing table are used to identify the bus group. The second and third position of the next function / index determine the alternative routes.

The third position of the next function may also point back to another set of next functions in the routing table to expand the number of alternative route options. The only other entries allowed are processing table pointers. If the routing table points to the bus group table, the bus group table usually points to the bus circuit in the bus circuit table. The output of the bus circuit table is the end connection for the call.

From Figures 16 to 21, it can be seen that the tables can be configured and interrelated so that the calling processes can enter the bus circuit table and can pass through the tables based on information and using indicators. The output of the tables is usually the end connection determined by the bus circuit table. Usually this connection is the voice route. In some cases, instead of a connection, processing by the processing table is specified. If a bus group can be selected at any time during processing, processing can go directly to the bus group table for terminating circuit selection. For example, it may be desirable to route calls from a specific ANI through a specific set of bus groups. In this case, the ANI identification table would point directly to the bus group table and the bus group table would point to the bus circuit table for the end circuit. The default route through the tables is: bus circuit, bus group, exception, ANI identification, called number, routing, bus group and bus circuit.

Figure 22 shows an example of a processing table. Either the index or the reason number of the received message is filled in and they are used to enter the table. If the index is completed and used to enter the table, the general place, coding standard, and causal value indicator are used to generate the SS7 REL. The position of the causal value of the received message is the causal value in the received SS7 message. If the causal value of the received message is filled in and used to enter the table, the causal value from this message in the REL format from the CCM is used. The next function and the next index point to the next table.

Figure 23 shows an example of the message table. This table allows the CCM to change information in outgoing messages. The message type is used to enter the table and represents the standard type of outgoing SS7 message. The field is a reference parameter within the outgoing SS7 message. Indexes point to different entries in the bus group table and determine whether parameters can remain unchanged, omitted, or modified in outgoing messages.

188 182

<td>MESSAGE TYPE</td><td>PARAMETERS</td><td>INDEX # 1</td><td>INDEX #. -</td><td>INDEX #N</td>

<td>COMPLETE ADDRESS</td><td>RETURN CALL ID</td><td></td><td></td><td></td>

<td></td><td>ACCESS TRANSPORT</td><td></td><td></td><td></td>

<td></td><td>CAUSE INDICATOR</td><td></td><td></td><td></td>

<td></td><td>OPTIONAL INDICATORS RETURN CALL</td><td></td><td></td><td></td>

<td></td><td>OPTIONAL INDICATOR "FE</td><td></td><td></td><td></td>

<td>ANSWER '~~</td><td>ACCESS TRANSPORT</td><td></td><td></td><td></td>

<td></td><td>CALL INDICATOR RETURN</td><td></td><td></td><td></td>

<td>CALLING UP</td><td>EVENT INFORMATION</td><td></td><td></td><td></td>

<td></td><td>CALL INDICATOR RETURN</td><td></td><td></td><td></td>

<td></td><td>ACCESS TRANSPORT</td><td></td><td></td><td></td>

<td></td><td>CAUSE INDICATOR</td><td></td><td></td><td></td>

<td></td><td>OPTIONAL CALL RATIO</td><td></td><td></td><td></td>

<td>CIRCUIT RESERVATION</td><td>STATUS OF CONNECTION INDICATOR</td><td></td><td></td><td></td>

<td>CONFIRMATION CIRCUIT RESERVATION</td><td>LACK</td><td></td><td></td><td></td>

<td>DISRUPTION</td><td>3 CANCER</td><td></td><td></td><td></td>

<td>CONTINUITY</td><td>CONTINUITY INDICATOR</td><td></td><td></td><td></td>

<td>EXIT</td><td>NUMBER OF OUTGOING BUS GROUP</td><td></td><td></td><td></td>

<td>INFORMATION</td><td>ALL PARAMETERS</td><td></td><td></td><td></td>

<td>INFORMATION TASK</td><td>ALL PARAMETERS</td><td></td><td></td><td></td>

<td>STARTING ADDRESS</td><td>STATUS OF CONNECTION INDICATOR</td><td></td><td></td><td></td>

<td></td><td>CALL FORWARD INDICATOR</td><td></td><td></td><td></td>

<td></td><td>WEBSITE CATEGORY Evoking</td><td></td><td></td><td></td>

<td></td><td>USER SERVICE NUMBER</td><td></td><td></td><td></td>

<td></td><td>CALLED PART NUMBER</td><td></td><td></td><td></td>

<td></td><td>ACCESS TRANSPORT</td><td></td><td></td><td></td>

<td></td><td>CALLING PART NUMBER</td><td></td><td></td><td></td>

<td></td><td>MEDIA IDENTIFICATION</td><td></td><td></td><td></td>

<td></td><td>INFORMATION 0 CHOICE MEDIA</td><td></td><td></td><td></td>

<td></td><td>RELEASE NUMBER</td><td></td><td></td><td></td>

<td></td><td>GENERAL ADDRESS</td><td></td><td></td><td></td>

<td></td><td>LINE INFORMATION INITIAL</td><td></td><td></td><td></td>

<td></td><td>INITIAL CALL NUMBER</td><td></td><td></td><td></td>

<td></td><td>CODE</td><td></td><td></td><td></td>

<td></td><td>SERVICE BLANKET</td><td></td><td></td><td></td>

<td></td><td>NYSO- TRANSIT NETWORK</td><td></td><td></td><td></td>

<td></td><td>STROKE COUNTER</td><td></td><td></td><td></td>

<td>TRANSMISSION</td><td>ALL PARAMETERS</td><td></td><td></td><td></td>

<td>ZUOLi ZENIE</td><td>CAUSE INDICATOR</td><td></td><td></td><td></td>

<td></td><td>ACCESS TRANSPORT</td><td></td><td></td><td></td>

<td></td><td>AUTOMATIC CONTROL OVERLOAD</td><td></td><td></td><td></td>

<td>FOR * EXEMPTION OF EXEMPTION</td><td>LACK</td><td></td><td></td><td></td>

<td>RESUMPTION</td><td>USKAZUIK SUSPENSION OF ENIAZW WITH NEW PRODUCTS</td><td></td><td></td><td></td>

<td>SUSPENSION</td><td>INDICATOR Suspensions / WZMOWIENIA</td><td></td><td></td><td></td>

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<td>state circuit</td><td></td><td></td><td></td>

<td>status circuit</td><td></td><td></td><td></td>

<td>indicator satellites</td><td></td><td></td><td></td>

<td>control echo</td><td></td><td></td><td></td>

<td>switch echo</td><td></td><td></td><td></td>

<td>ID equipment</td><td></td><td></td><td></td>

<td>£ -3 £ 2 0 P g 73 &amp; u</td><td></td><td></td><td></td>

<td>number group bus</td><td></td><td></td><td></td>

<td>VC</td><td></td><td></td><td></td>

<td> £</td><td></td><td></td><td></td>

<td>CIC</td><td></td><td></td><td></td>

<td>code concerned point</td><td></td><td></td><td></td>

<td>index</td><td></td><td></td><td></td>

<td>next function</td><td></td><td></td><td></td>

<td>ABOUT</td><td></td><td></td><td></td>

<td>ACC active</td><td></td><td></td><td></td>

<td>counter jumping</td><td></td><td></td><td></td>

<td>sequence selection</td><td></td><td></td><td></td>

<td>relevant NPA</td><td></td><td></td><td></td>

<td>indicator services</td><td></td><td></td><td></td>

<td>group bus satellites</td><td></td><td></td><td></td>

<td>CLLI</td><td></td><td></td><td></td>

<td>control continuity</td><td></td><td></td><td></td>

<td>Resolution You Æ lighting</td><td></td><td></td><td></td>

<td>number group bus</td><td></td><td></td><td></td>

<td colspan="2">index</td><td></td><td></td><td></td>

<td colspan="2">next function</td><td></td><td></td><td></td>

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<td>digits from</td><td></td><td></td><td></td>

<td>character address</td><td></td><td></td><td></td>

<td colspan="2">ID carrier</td><td></td><td></td><td></td>

<td colspan="2">ID selection carrier</td><td></td><td></td><td></td>

<td colspan="2">index table exception</td><td></td><td></td><td></td>

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UP Department of Publications. Circulation of 70 copies Price PLN 6.00