MXPA98009609A - A system to convert an itinerary address within a telecommunication network - Google Patents

Abstract

The present invention relates to a point key and a subsystem number (PC / SSN) representing a first application layer node within a first network of Signaling System No. 7 (SS7), it is not defined within a second network of the SS7. While transmitting a first signal from the first node to a second node, within the second network of the SS7, the PC / SSN, which represents the first node, is used as the address of the calling party (Cgpa). A signal transfer point (STP) of the converter that interfaces the first network of the SS7 with the second network of the SS7, intercepts the transmitted signal, converts the specified PC / SSN to a corresponding global title number. The first signal, which contains the converted Cgpa, is then sent forward to the second node. When the second node, within the second network of the SS7, transmits a return signal back to the first node, the converted Cgpa is then used as the address of the called party (Cgpa). The STP of the converter again intercepts the return address and converts the intercepted global title number back to the original value of the PC / SSN. The return signal, with the converted Cdpa, is then routed back to the first no

Description

A SYSTEM TO CONVERT AN ITINERARY ADDRESS WITHIN A TELECOMMUNICATIONS NETWORK RELATED REQUEST This request is related to the US patent application, 08 / 630,355, filed on April 10, 1999, entitled "A Network Protocol Conversion Module within a Telecommunications System", by Jan Lindquist et al. .

BACKGROUND OF THE INVENTION Technical Field of the Invention The present invention relates to the communication of application layer signals across different telecommunications networks and, in particular, to the conversion of a point key and a subsystem number into the application layer signal, transmitted from a first telecommunications network of Signaling System No. 7 (SS7) to a global title number, which can be routed into a second telecommunications network of the SS7.

Description of the Related Art A typical telecommunication exchange is a complex digital processor, comprising a large number of devices, signal terminals and, more importantly, software and hardware modules (computer programs and equipment) for supplying telecommunications services to the users of them. With the development of the aforementioned digital processor and a Common Channel Signaling (CCS) network system, a typical telecommunications exchange is now capable of supporting and transporting many more than mere voice data. This data may include video images, control signals or application specific information. An example of such application-specific information may be the validation data of a credit card, communicated over an existing telecommunications network, to verify the number of a customer's credit card. In order for two or more telecommunication exchanges to properly exchange data with each other, all parts of a "conversation" must agree on a specific communications protocol. This protocol must be strictly followed by each party in order to timely and correctly deliver data to the correct place and communicate recognizable data to terminal users connected in a conversation or session over a network or series of networks. Consequently, in the modern telecommunications industry, standard communications systems are linked together, using protocols based on the Open Systems Interconnection (OSI) model.

The OSI model is the structure, accepted inter-nationally, of rules for communication between different systems made by different vendors. The goal of the OSI is to create an open system network environment where any vendor computer system, connected to any network, can freely share data with any other computer system on that network. However, the fact that a system is "open" does not imply a particular protocol or specification. Rather, OSIs provide a conceptual and functional structure that allows and supports users to develop their own telecommunications specifications to conform to higher OSI layers. Most of the OSI standards, widely accepted, for telecommunications type communications, has been the Common Channel Signaling (CCS). In particular, the technology, most commonly used to carry out CCS in the United States of America, has been Signaling System No. 7 (SS7). However, it should be noted that even within the same SS7 tele-communications protocol, there are different mechanisms to transport signals as a source node to a destination node. There are basically two different ways to route a signal within an SS7 network. First, the routing can be based on a combination of a point key (PC) and a subsystem number (SSN, then collectively referred to as a PC / SSN). When a PC / SSN is provided for a signal, each participation node (such as a signal transfer point, STP), within the service network, must have data that defines the specified PC / SSN. Therefore, when a signal is received with a particular PC / SSN, each transfer node within the service network will know exactly where and who sends the signal. As an alternative, signals can also be routed using global title numbers. When the originating node does not know the PC / SSN associated with the destination node, a global title number has to be used for itinerary purposes. Each transfer node, which connects the originating node with the destination node, knows only to forward the received signal with a particular global title number towards a certain network or address. At some point, a correct PC / SSN has to be provided so that the signal can reach its final destination. This function is known as a global title transaction and is usually performed by the STP adjacent to the destination node. Since other intermediate nodes in addition to the adjacent STP, merely forward the signal to the correct address, different from the network using the PCs / SSNs, the intermediate transfer nodes do not have to contain data defining the destination node indicated by the Global title number received. If a PC / SSN associated with a particular node within an SS7 network is defined through this SS7 network (all participation nodes within the SS7 network have data correlated with the PC / SSN with the particular node), it is much more efficient and direct to route the signal using the defined PC / SSN. A signal transmitted by a source node will be routed directly to the specified destination node, since all the intermediate nodes that connect the source node to the destination nodes will know where and how to send the signal forward. However, if the PC / SSN is not defined through the SS7 network, then the signal must be routed using a global title number, until it reaches a particular transfer node that contains the relevant data defining the PC / SSN. Such translation of the global title is not efficient and slows the routing of the signal. When a signal is communicated from a first node within a first network SS7 to a second node within a second network SS7, the PC / SSN associated with the first node is included in the signal as the address of the called party (Cdpa) . Such address of the called party is then used by the second node within the second network SS7 to return the signal back to the first node. However, unless all the intermediate nodes within the second SS7 network are defined with the PC / SSN value, which represents the first node, such an itinerary on the second SS7 network is not possible. On the other hand, it is not efficient for the first node to always transmit all its signals using the global title numbers as the address of the called party, because it delays the routing of the signal and needs additional processing time for each intermediate node within of the first SS7 network. Therefore, it would be advantageous to provide a conversion system for routing a signal transmitted with a PC / SSN over an SS7 network that does not have the specified PC / SSN defined.

COMPENDIUM OF THE INVENTION The present invention discloses a method and apparatus for converting a point key and the subsystem number (PC / SSN), which represent a called party address for a particular signal into a corresponding global title number, for enable the signal to be transported over a network of a Signaling System No. 7 (SS7), which does not have the particular PC / SSN defined. A signal transfer point (STP) of the converter, which connects a first network SS7 with a second network SS7, converts the PC / SSN representing the address of the calling party, into the received signal, to the global title number correspondent. The number of the converted global title represents the first node within the first SS7 network that originates the signal and when a return signal is then received by the STP of the converter, which uses the global title number converted as the address of the collective line call, the STP of the converter converts the global title address into the original PC / SSN. The STP of the converter transmits the return signal using the PC / SSN as the address of the called party to the first node. In another embodiment, the global title number converted by the STP of the converter represents this STP of the converter of the first node within the first network of the SS7. When the received signal is converted and transmitted by the STP of the converter, the received PC / SSN is also encapsulated in one of the parameters of the optional Signaling Connection Control Part (SCCP), within the transmitted signal. When a return signal using the global title number converted as the called party number and the subsequent encapsulation of the original PC / SSN is then received by the converted STP, the STP of the converter extracts the encapsulated PC / SSN and sends forward the return signal used by the PC / SSN extracted as the address of the party called to the first node.

BRIEF DESCRIPTION OF THE DRAWINGS A more complete understanding of the method and apparatus of the present invention can be obtained with reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein: Figure 1 is a block diagram illustrating a telecommunications network typical of Signaling System No. 7 (SS7); Figure 2 is a block diagram, illustrating the different layers within the telecommunications system SS7; Figure 3 is a network architecture, representing a typical SS7 telecommunications network, connecting a source node to a destination node; Figure 4 is a block diagram illustrating a logical routing path, taken by a signal using a point key and the subsystem number as the steering mechanism; Figure 5 is a block diagram, illustrating possible routing paths, taken by a signal using a global title number as the steering mechanism; Figure 6 is a block diagram, illustrating the routing inconsistency that exists when a first SS7 network using a PC / SSN interface with a second SS7 network, which uses a global title number; Figure 7 is a block diagram, illustrating a conversion module interfacing with the modules of the Signaling Connection Control Part (SCCP) to convert the address of the called party into a signal communicated between the first and second telecommunications networks SS7; and Figure 8 is a block diagram, illustrating a signal transfer point (STP) of the converter, which connects a first network SS7 with a second network SS7 and which converts a point key and a number of the subsystem into the network. received signal to a corresponding global title number.

DETAILED DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram representing a section of a telecommunications network typical of Signaling System No. 7, in which the present invention is to be carried out. With the advent of digital interruption, Common Channel Signaling (CCS) has quickly become the preferred way to handle call connection in networks connected to circuits. The most commonly used technology to carry out the CCS in E. U. A., has been the Signaling System No. 7 (SS7) initially created by the Consultative Committee on International Telephone &; Telegraph (CCITT) and later modified by the American National Standards Institute (ANSI). To carry out the routing and signaling functions within the network, messages must be sent by means of a packet switched signaling network from a first node 10A, such as a local exchange A to a second node 10B. The Dual Signal Transfer Points (STP), 270A and 270B, are designed to provide reliable transfer of signaling messages by always providing more than one signal link 275 between any two nodes. These signals, which contain application layer data, are transported within a network or series of networks without establishing a physical connection between a source node and a destination node (a node may comprise a local exchange, database or any other other elements that generate signals, connected as part of a telecommunications network). Unlike the channel that carries voice data, each separate packet is routed, individually and separately, to its destination node. Therefore, each signal includes source and destination addresses, which direct the STPs to correctly deliver the packet to the destination node. The data required by the application layer modules, such as the credit card validation procedures or the automatically recalled feature, are encapsulated in the message signals of the Capable Transaction Application Part (TCAP). ) or other application layer signals and are transported from one node in the network to another node in this network. More specifically, the parameters of the Signaling Connection Control Part (SCP) within each signal header are filled with the necessary addresses of origin and destination, to enable the signal to travel through a network or series. of networks. Figure 2 is a block diagram illustrating the different layers within a typical SS7 telecommunications system. According to the layer architecture of the Open System Interface (OSI)), a telecommunications system SS7 is also in layers of the multiple system. Basically, the SS7 has two parts, a user part and a message transfer part. The message transfer part (MTP) 300 is the lowest layer of the SS7 network system and is used to transport data physically from one point to another in the network. The user part comes in different varieties. Examples of such user parts include a Telephone User Part (TUP) 360, for the basic telephone service, and a User Part (ISUP) of the Integrated Digital Service Network (ISDN) 350 for combined voice, data and voice services. These user parts also use the MTP 300 to initiate a transport service with less connection, but in sequence. The applications 340, which reside in the uppermost layer of the SS7 network, use the Transaction Capabilities Application Part layer 330, and the Signaling Connection Control Part (SCCP) layer 310, to transport the data from the application layer from one application to another, by means of the MTP 300. The applications may also use their own message signals for the interface directly with the SCCP layer 310 to communicate the data of the application layer from a application to another. The purpose of the SCCP 310 is to provide elements for routing from one end to the other. Therefore, the SCCP 310 processes the specified address within une. particular signal to properly deliver the data to the specified destination. This address information is used at each signaling point, such as a Signaling Transfer Point (STP), by the MTP 300 to determine which communication link to use. Figure 3 is a network architecture represeg a typical telecommunications network SS7, which connects a first node, such as the mobile switching center / visitor location recorder (MSC / VLR) 10A with the destination node, such as a home location register (HLR) 20B. Using a mobile telecommunications system, as an illustration, any mobile station travels in a new MSC / VLR area, this MSC / VLR 10A serves to communicate with the HLR 10B associated with the mobile station to inform HLR 10B of the current location of the mobile station. the mobile station. If the mobile station is currently located away from its home Public Land Mobile Network (PLMN), the MSC / VLR 10A service may be a node connected to a different SS7 network than one that connects to the HLR 10B home. The MSC / VLR 10A then communicates with the HLR 10B of the home by a multitude of intermediate nodes 270, which connect the MSC / VLR 10A with the HLR 10B. The address of the called party within a signal transmitted by the MSC / VLR 10A must enable the intermediate nodes to recognize the HLR 10B as the destination node and, therefore, carry forward the transmitted signal to the correct destination. In order to properly facilitate the delivery of a return signal back from the second node to the first node, the address of the calling party specified by the MSC / VLR 10A must further enable the intermediate nodes for the further transport of a signal on the second SS7 network. There are basically two different ways to route a signal within an SS7 network. First, the routing signal may be based on a combination of a point code (PC) and a subsystem number (SSN, hereinafter referred to collectively as PC / SSN). As an alternative, a signal can also be routed using a global title number. Although the use of PC / SSN is the most direct and efficient way to route a signal, not all SS7 networks can route signals using a particular PC / SSN. Figure 4 is a block diagram illustrating a logical routing path, taken by a signal over an SS7 network, while using a PC / SSN as the steering mechanism. When a PC / SSN is provided as the address of the called party (Cdpa), each participating node (not shown in Figure 4, see 270 in Figure 3), connects the originating node to the destination node within The service SS7 network 20 must contain data that defines the specified PC / SSN. Consequently, each intermediate participating node that receives the signal with a particular PC / SSN, knows exactly how and where to send the signal forward. Therefore, assuming that all the links are ascending and available, the logical path 30 illustrates the signal path taken by an SS7 network to communicate the signal between the service MSC / VLR 10A and the HLR 10B of the home. Although routing by means of the particular PC / SSN is an effective and direct way of transporting a signal within an SS7 network, such routing is not possible unless all the intervening intermediate nodes within that particular SS7 network contain data that define the particular PC / SSN. Usually, the requirement of a first SS7 network to define data identifying each source and destination node within the first SS7 network is not a problem. However, requiring a first SS7 network to define data identifying each not connected to the second SS7 network is not always possible or convenient. Alternatively, a signal can also be routed through a global title number. Therefore, Figure 5 is a block diagram illustrating the possible routing paths taken by an SS7 network to communicate a signal using a global title number. This global title number, such as a directory number marked by a telecommunications subscriber, does not point exactly where the destination node is located. Each intermediate node (not shown in the Figure, see 270 in Figure 3), within the service network SS7 does not contain data that correlates a particular global title number with a particular node. Nevertheless, by analyzing a relevant position of the received global title number, each intermediate node is at least able to carry forward the received signal to the correct address. For example, if a signal, which contains 214-555-1212, is received as the address of the called party by a signal transfer point (STP), this STP can not determine the exact location of the specified destination node. However, by analyzing a portion of the global title number, such as the first three prefixes, the STP is able to figure out that this signal needs to be sent forward to the Dallas, Texas area, for example. Once an STP arrives within the Dallas, Texas area, another STP then analyzes the next three digits to determine the appropriate subarea within the Dallas, Texas area. Finally, it will arrive at an intermediate node, usually the adjacent STP connected to the final destination node, which recognizes the number of the received global title, translates this global title number to the corresponding PC / SSN, and sends the signal to the final destination node. . Accordingly, if the serving MSC / VLR 10A transmits a signal using a particular global title number, which represents the HLR 10B of the home as the address of the called party within the SS7 20 network, all possible routing paths within of the service network SS7 20 are illustrated by the logical paths 30. Instead of establishing a direct connection between the service MSC / VLR 10A and the HLB 10B of the home, each intermediate node within the service network SS7 20, merely sends forward the signal to the correct address (as denoted by arrows 40 of the logical address). At some point, the PC / SSN is provided with the signal and is delivered to its final destination node. Compared to the routing of a signal through the PC / SSN, the signal routing using the global title number is inefficient and problematic, because each intermediate transfer node has to analyze the received global title number. However, for storage capacity and for maintenance reasons, a first SS7 network usually does not store data defining an external node connected to another SS7 network. Accordingly, if a signal is transmitted to an external node connected to another SS7 network, the address mechanism of the global title number is necessary. Figure 6 is a block diagram illustrating the routing inconsistency that exists when a first SS7 network using the PC / SSN interface with a second SS7 network using a global title number. This second network SS7 20B does not contain data defining the PC / SSN associated with the first node 10A within the first network SS7 10A. When the first node 10A within the first network SS7 transmits an application layer signal to the second node 10B within the second network SS7, the global title number, representing the second node 10B is used as the part number. call. However, in order to facilitate proper delivery of a return signal back to the first node 10A, the signal transmitted by the first node 10A also contains its own PC / SSN, such as the address of the calling party. Since the global title numbers can be routed in both SS7 networks, the signal using the global title address specified as the address of the called party is routed appropriately from the first node 10A to a second node 10B. If the second node 10B wishes to transmit a return signal back to the first node 10A in response to the reception of the signal, the address of the calling party within the received signal is used as the address of the called party for the signal return. However, the address of the called party is a PC / SSN. Since the intermediate transfer nodes within the second network 20B of the SS7 do not contain data defining the specified PC / SSN, the return address can not be properly routed back to the first network 20A of the SS7. Thus, there is a need for a conversion system that converts the specified PC / SSN to a corresponding global title number, to enable the first SS7 network to route the signal using the specified PC / SSN, such as the route address and enable the second SS7 network to route the same signal using the global title number converted as the route address. In accordance with the teachings of the present invention, Figure 7 is a block diagram illustrating a conversion module in interface with the modules of the Signaling Connection Control Part (SCCP), to convert the address of the called party within a signal communicated between the first and second telecommunications networks. The MTP layer 300A of the first network SS7 physically carries the signal from the first network SS7 and interfaces with the module 310A of the SCCP of the first network SS7. The first SCCP module 310 retrieves the signal from the first MTP layer 300A and sends it forward to the conversion module 50. This conversion module 50, in response to the dynamic values stored in its conversion table or register 60, therefore changes the received PC / SSN, which represents the originating node to the corresponding global title number. The signal with the parameters of the SCCP of the address of the called calling party, and which still contains the same data of the application layer, is then transmitted to the second network SS7 to be delivered to the destination application node. Accordingly, the converted signal interfaces with the second SS7 network in module 310 of the SCCP. This second module 310B of the SCCP, in turn, interfaces the signal with the second network SS7 in the layer 300B of MTP, for physical transport to the destination node. The converted address of the calling party will be used later by the destination node to transmit a return signal back to the originating node. During the general conversion and the interface process, only the data of the SCCP layer within the signal header is manipulated by the conversion module and all other layer data, including the TCAP data, is transported transparently to through the conversion module. Figure 8 is an exemplary embodiment of the present invention. An STP 40 of the converter connects a first network 20A of the SS7 with a second network 20B of the SS7. For normal telephone service, which includes voice data communication and call adjustment, a converter is not necessary. For normal telephone connections, signals such as ISUP or TUP do not require parameters from the SCCP. However, the application layer data encapsulated in a signal using the SCCP parameters, such as a signal from the Mobile Application Part (MAP), communicated between an MSC / VLR and an HLR, is intercepted and converted by the conversion module 50, which resides within the STP 40 of the converter. The signals are intercepted and sent forward to the conversion module 50, according to the manner described in Figure 7. The conversion module 50 that resides within the STP 40 of the converter converts the received PC / SSN value to the title number. corresponding global, with reference to the conversion table 60, which stores the global title numbers and their related related references. A conversion table or register 60 comprises: Table 1 Using the above points, the PC / SSN SCCP parameter values are also related and converted into the corresponding global title numbers, according to Table 2: Table 2 In Figure 8, the first node 10A, having an SSN value of 5, originates an application layer signal (first signal) while connecting to the first 20A network of the SS7 with a PC value of 8-9-1 . Therefore, the address of the calling party for the first signal is PC = 8-9-1 and SSN = 5. A user who enters the address of the called party, which specifies the destination node, also needs to be specified by the SCCP parameters to show, for example: TT = 3; and the global title number = 051122214. Using the address of the called party specified in the format of the global title number, the first network 20A of the SS7 is able to route the first signal to the STP 40 of the converter. Once the first signal, which contains the address of the calling party and the address of the previous called party, is received by the STP 40 of the converter, the address of the calling party and the address of the called party received is converted in accordance with Tables 1 and 2 above. For the parameter values of the SCCP of the address of the called party since TT = 3 corresponds to the label 1 SS7, no conversion is executed, as specified by the first row of Table 2. The conversion module 50 assumes that the address of the called party is already in the format of the global title number and no conversion needs to be executed. Since the address of the called call, which indicates the second node 10B within the second network 20B of the SS7 has been appropriately specified by the user, the first signal can be transported to the final destination. The address of the calling party, on the other hand, is not used by the second network of the SS7 to deliver the first signal to the second node 10B. However, if the second node 10B subsequently wishes to return a message back to the first node 10A, the address of the appending calling party is used as the address of the called party for the new return signal. As previously described, because the specified PC / SSN, which represents the first node 10A within the first network 20A of the SS7 is not defined within the SSB network 20B, the routing of the return signal, using the received PC / SSN as the address of the called party is not possible. Therefore, in order to facilitate proper delivery of the resulting message back to the first node 10A, the conversion module 50, while transmitting the first signal to the second node 10B, converts the address of the calling party, stored in the PC / SSN format to the corresponding global title number format, in accordance with the teachings of the present invention. The address of the calling party, specified by the first node 10A, comprises SSN = 5 and PC = 8-9-1. Since this particular PC / SSN is the label of 2 SS7, the values of the SCCP parameter are converted as specified by the second row of Table 2. Therefore, using Tables 1 and 2, the address of the calling party (Cgpa) and the called party address (Cdpa) of the first signal are converted from: Cdpa: TT = 3 Cgpa: PC = 8-9-1 GTN = 051122214 SSN = 5 a: Cdpa: TT = 3 Cgpa: TT = 8 GTN = 051122214 GTN = 8134445555 Next, when the second node 10B within the second network 20B of the SS7 transmits a correct signal back to the first node 10A, the next address of the called party of the SCCP and the address of the calling party are again transmitted by the second node 10B and received by the STP 40 of the converter: Cgpa: TT = 3 Cdpa: PC = 8-9-1 GTN = 051122214 SSN = 5 As enumerated above, the values of the parameters of SCCP, Cgpa and Cdpa for the first signal are exchanged to understand the values of the parameters Cdpa and Cgpa for the return signal. Using the number of the global title converted as the address of the called party, the return signal is routed appropriately from the second node 10B to the STP 40 of the converter, on the second network 20B of the SS7. Once the return signal is received by the conversion module 50, in order to facilitate a more direct signal transfer over the first network of the SS7, the address of the received called party is converted back to the values of the SCCP original parameter, PC / SSN format, graduating the previous Tables 1 and 2. Therefore, the calling party address and the called party address are converted to: Gdpa: PC = 8-9-1 Cgpa: TT = 3 SSN = 5 GTS = 051122214 Using the address of the reconverted called party in the PC / SSN format, the STP 40 of the converter is capable of transmitting the return signal directly and efficiently to the first node 10A on the first 20A network of the SS7. As another embodiment of the present invention, in order to reduce the storage capacity required by the STP 40 of the converter, to store all possible PC / SSN combinations, with their corresponding global title numbers, the conversion module 50 within of STP 40 of the converter, converts the values of the parameter of the SCCF, PC / SSN format, into the received signal to the global title number that represents the STP 40 of the converter. By the transmission of the first signal with the global title number, which represents the STP 40 of the converter, as the address of the calling party, any subsequent return signal, transmitted by the second node 10B, will be routed back to the STP 40 of the converter. While transmitting the first signal to the second node 10B, the values of the SCP parameter, in PC / SSN, received from the first node 10A as the address of the calling party, are also encapsulated in the optional parameters of the SCCP, not used by the second 20B network of the SS7. These optional parameters are not manipulated by the second node 10B to be included in the return signal from the second node 10B. Therefore, the original values of the SCCP parameters in PC / SSN are returned in the first signal when they are transmitted from the STP 40 of the converter to the second node 10B. When the decision is made to transmit the return signal, the parameter values received from the SCCP, in PC / SSN, are returned to the STP 40 of the converter per application in the transmitted return signal. Once the returned PC / SSN values are received by the STP 40 of the converted, instead of using Table 1 above to perform the conversion, the encapsulated PC / SSN values are extracted from the return signal by the module. 50 conversion, and transmitted to the address of the called party on the first SS7 network. Using a global title number, assigned to the STP 40 of the converter as the address of the calling party, the conversion module 50 does not have to internally store all possible combinations of the PC / SSN values with the corresponding global title numbers . Although a preferred embodiment of the method and apparatus of the present invention has been illustrated in the accompanying drawings and described in the above Detailed Description, it will be understood that the invention is not limited to the disclosed mode, and that it is capable of numerous rearrangements, modifications and substitutions, without departing from the spirit of the invention, as indicated and defined by the following claims.

Claims (21)

1. CLAIMS 1. A method for communicating a signal between a first node, within a first network of a Signaling System No. 7 (SS7), and a second node, within a second network of the SS7, in which this first network of the SS7 and the second network of the SS7, are connected by a signal transfer point (STP) of the converter, and where the signal includes a point key and a subsystem number, which represents the first node as an address of the part that calls, in which this point key and subsystem number s can route within the first network of the SS7, but not route within the second network of the SS7, this method comprises the steps of: receiving the signal from the first node by the signal transfer point (STP) of the converter, this signal, which includes the point key and the subsystem number, represents the first node as the address of the calling party (Cgpa); converting the received point key and subsystem number into a global title number, which can be routed into the second telecommunications network by the STP of the converter, and replacing the global title number in the signal as the address of the the calling party; and transmitting the signal from the STP of the converter to the second node, on the second network of the SS7.
2. 2. The method of claim 1, wherein the STP of the converter comprises an international access STP.
3. 3. The method of claim 1, wherein the step of converting the global title number comprises the step of converting to a global title number, which represents the first node within the first network of the SS7.
4. 4. The method of claim 3, further comprising the steps of: receiving a return signal by the STP of the converter, sent from the second node, in response to the signal, this return signal is carried on the second network of the SS7, using the global title number as a called party address; convert the global title number into the key of the point and the subsystem number, which represent the first node and replace this point key and the subsystem number as the address of the called party; and transmitting the return signal from the STP of the converter to the first node, on the first network of the SS7.
5. 5. The method of claim 1, wherein the step of converting the global title number comprises the step of converting into a global title number representing the STP of the converter.
6. 6. The method of claim 5, wherein the signal comprises a plurality of parameters and wherein the step of transmitting the signal further comprises the step of encapsulating the point key and the subsystem number received within one of the plurality of parameters that do not they are used by the second network of the SS7.
7. 7. The method of claim 6, further comprising the steps of: receiving a return signal by the STP of the converter, sent from the second node, this return signal is transported on the second network of the SS7, using the global title number as an address of the called party, and where the return signal also encapsulates the point key and the subsystem number; extracting the point key and the sub-system number encapsulated from the return signal by the STP of the converter; and transmitting the return signal from the STP of the converter to the first node on the first network of the SS7, using the extracted point key and the subsystem number, as the address of the called party.
8. 8. A system for communicating a signal containing data from the application layer, between a first node, within a first network of Signaling System No. 7 (SS7), and a signaling node, within a second network of the SS7 , in which the signal includes a point key and a subsystem number, representing a first node, such as the Address of the Calling Party, where the point key and the subsystem number are defined within the first network of the SS7 , and in that this point key and the subsystem number are not defined within the second network of the SS7, this system comprises: a signal transfer point (STP) of the converter, which connects the first network of the SS7 with the second SS7 network, this STP of the converter comprises: a layer module of a Signaling Connection Control Part (SCCP), to receive the signal from the first network of the SS7; and a conversion module in interface with the layer module of the SCCP, this conversion module converts the point key and the subsystem number within the received signal to a global title number, which can be routed through the second network of the SS7.
9. 9. The system of claim 8, wherein the global title number represents the first node within the first network of the SS7.
10. 10. The system of claim 8, further comprising a memory table, for storing possible point keys and subsystem numbers within the first network of the SS7, with corresponding global title numbers.
11. 11. The system of claim 10, wherein the SCCP module receives a return signal from the second node, this return signal is routed over the second network of the SS7, using the global title number as an address of the called party; wherein the conversion module converts the global title number into the point key and the subsystem number, previously received within the signal; and in that the SCCP module transmits the return signal to the first node on the first network of the SS7, bypassing the converted point key and subsystem number, such as the address of the called party.
12. 12. The system of claim 8, wherein the global title number represents the STP of the converter.
13. 13. The system of claim 12, wherein the signal comprises a plurality of parameters and the STP of the converter further comprises an element for encapsulating the point key and the subsystem number in one of the plurality of parameters that are not used by the second one. SS7 network.
14. 14. The system of claim 13, wherein the module of the SCCP layer receives a return signal from the second node, this return signal is routed over the second network of the SS7 using the global title number as a part address. call and also encapsulates the point key and the subsystem number; where the conversion module extracts the key of point and the subsystem number encapsulated, from the return signal; and where the module of the SCCP layer transmits the return signal to the first node, using the extracted point key and subsystem number, such as the called party number.
15. 15. A system for communicating a signal between a first node, within a first network of Signaling System No. 7 (SS7) to a second node, within a second network of SS7, in which the first node is identified by a key of point and a subsystem number, and in which the first network of the SS7 is capable of routing the signal using the point key and the subsystem number and where this first network is capable of routing the signal, using the point cleive and the number of the subsystem, and where the second network of the SS7 is unable to route the signal using the point key and the subsystem number, this system comprises: a Signal Transfer Point of the converter, which connects the first network of the SS7 to the second network of the SS7, this STP of the converter comprises: an element for receiving a signal from the first node, this signal includes the point key and the subsystem number, representing the first node, as an address of the part that call; an element for converting the point key and the subsystem number into a global title number, which can route over the second network of the SS7 and replace the global title number converted to the signal, such as a calling party address; and an element for transmitting the signal to the second node on the second network of the SS7.
16. 16. The system of claim 15, wherein the STP of the converter comprises an international access STP.
17. 17. The system of claim 15, wherein the converted global title number represents the first node within the first network of the SS7.
18. 18. The system of claim 17, wherein the STP of the converter further comprises: an element for receiving a return signal from the signaling node, this return signal is routed over the second network of the SS7, using the global title number as an address of the called party; an element for converting the global title number back into the point key and the subsystem number, previously received within the signal; and an element for transmitting the return signal to the first node on the first network of the SS7, using the point key and the subsystem number as the address of the called party.
19. 19. The system of claim 15, wherein the global title number represents the STP of the converter.
20. 20. The system of claim 19, wherein the signal comprises a plurality of parameters and the STP of the converter further comprises an element for encapsulating the received point key and subsystem number, within one of the plurality of parameters that are not used. for the second SS7 network.
21. 21. The system of claim 20, wherein the STP of the converter further comprises: an element for receiving a return signal from the node node, this return signal is transported on the second network of the SS7 using the global title number as The address of the called party and in which the return signal also encapsulates the point key and the subsystem number; an element for extracting the point key and subsystem number encapsulated from the return signal; and an element for transmitting the return signal to the first node on the first network of the SS7, using the extracted point key and the subsystem number, such as the address of the called party.