KR102237494B1 - Ip network matching system on analog subscriber of class 5 telephone electronic switching system - Google Patents

Abstract

IP network matching system for analog subscribers of 5ESS switch is started.
This system includes an analog subscriber board, a main processing board and a test board. The analog subscriber board converts the analog voice signal received from the analog subscriber terminal into a corresponding PCM (Pulse Code Sampling) signal and transfers it to the main processing board. It is converted into a signal and transmitted to the analog subscriber station. The main processing board converts the PCM signal transmitted from the analog subscriber board into a corresponding IP packet and transmits it to the IP network, and converts the IP packet received from the IP network into a corresponding PCM signal to the analog subscriber board. Deliver. The test board performs a subscriber test under the control of the main processing board, generates a reel, and transmits the reel to the analog subscriber terminal through the analog subscriber board. The analog subscriber board is an analog subscriber board of a Class 5 telephone electronic switching system (5ESS) that matches the analog subscriber terminal to a public switched telephone network (PSTN).

Description

IP network matching system for analog subscribers of 5ESS switch {IP NETWORK MATCHING SYSTEM ON ANALOG SUBSCRIBER OF CLASS 5 TELEPHONE ELECTRONIC SWITCHING SYSTEM}

The present invention relates to an IP network matching system for analog subscribers of a 5ESS switch.

In the case of the existing fixed-line voice telephone service, a public switched telephone network (PSTN), which is a circuit-switching method, was used. However, due to the development of the Internet, the existing wireline voice telephone service is also changing to a method using an IP (Internet Protocol) network.

1 is a diagram schematically showing a network matching structure in a conventional wireline voice telephone service.

Referring to FIG. 1, Alcatel-Lucent's 5ESS (Class 5 telephone electronic switching system) switch 1 transmits an analog signal, which is a voice signal, from an analog subscriber terminal 2-1, …, 2-N to a subscriber line Tip/Ring. It is received through (3) and converted into a corresponding PCMized V5.2 protocol signal and transmitted to the PSTN(4). Conversely, the PCMized protocol signal transmitted from the PSTN(4) is received and converted into a corresponding analog signal. The wireline voice telephone service is performed in a manner that is transmitted to the analog subscriber terminals 2-1, …, 2-N through the subscriber line 3.

Here, a local exchange (not shown) is located between the 5ESS switch 1 and the PSTN 4, so that the network matching structure in the wired voice telephone service that performs signal transmission between the 5ESS switch 1 and the PSTN is used. May be.

However, the conventional technology is a technology for converting and transferring the analog signals of analog subscriber terminals 2-1, ..., 2-N to the PSTN (general telephone network) through the 5ESS switch 1, and a 5ESS switch using the PSTN ( The problem of occupying a large number of the receiving area within the office of exchange because it is composed of a complex structure of 1), and operating cost (OPEX) and network investment cost (CAPEX) compared to the configuration using the ALL-IP network consisting of a single network and integration in the current technology. There is a problem that it cannot be minimized.

Therefore, in order to solve this problem, in order to convert to IP network matching, the existing system must be demolished and a new IP matching switching system must be installed at the location. However, if the 5ESS switch, which is used to provide the existing fixed-line voice telephone service, is replaced with a new IP matching switch system, the existing 5ESS switch may become unnecessary and cost loss may occur. There is a need for a way to continue to use even some functions of the exchange.

The problem to be solved by the present invention is to provide an IP network matching system capable of matching an IP network to an analog subscriber using an analog subscriber board of an existing 5ESS switch.

IP network matching system according to a feature of the present invention,

As an IP network matching system that matches an analog subscriber terminal to an IP (Internet Protocol) network, it includes an analog subscriber board, a main processing board, and a test board, and the analog subscriber board corresponds to an analog voice signal received from the analog subscriber terminal. Converted into a PCM (Pulse Code Sampling) signal and transmitted to the main processing board, and the PCM signal transmitted from the main processing board is converted into a corresponding analog voice signal and transmitted to the analog subscriber terminal, and the main processing board The PCM signal transmitted from the analog subscriber board is converted into a corresponding IP packet and transmitted to the IP network, and the IP packet received from the IP network is converted into a corresponding PCM signal and transmitted to the analog subscriber board, and the test The board performs a subscriber test under the control of the main processing board, generates a reel, and transmits the reel to the analog subscriber terminal through the analog subscriber board, and the analog subscriber board transfers the analog subscriber terminal to a public switched telephone network (PSTN). It is an analog subscriber board of 5ESS (Class 5 telephone electronic switching system) matching to ).

Here, the main processing board is composed of the analog subscriber board and two MPU (Main Process Unit) boards connected to the IP network, respectively, and the two MPU boards are connected through a redundant channel, and the two MPU boards are connected to each other through a mutual monitoring. A redundant operation between the analog subscriber board and the IP network is possible.

In addition, the main processing board is connected to the analog subscriber board through a control bus and a PCM bus, and the analog subscriber board transmits an event signal (hookoff/on/flash) received from the analog subscriber terminal to the UART of the control bus. (Universal Asynchronous Receiver/Transmitter) transfers to the main processing board through a communication method, and the main processing board receives the control from the SSW (Soft Switch) of the IP network and transmits ring and test signals to the UART communication method of the control bus. It is transmitted to the analog subscriber board through

In addition, the main processing board converts the control signal transmitted from the analog subscriber board through the control bus into a corresponding control packet and transmits it to the IP network, and receives a control packet received from the IP network to control the corresponding control signal. It is converted into a signal and transmitted to the analog subscriber board through the control bus.

In addition, the analog subscriber board performs diagnosis inside the analog subscriber board by controlling the main processing board through the control bus, and transmits the diagnosis result to the main processing board through the control bus.

In addition, the test board is connected to the main processing board through the control bus, performs the subscriber test by control of the main processing board through the control bus, and reports the result of the subscriber test through the control bus. Transfer to the main processing board.

In addition, from the shelf in which the board constituting the SM (Switching Module) including the analog subscriber board used in the 5ESS is mounted, the remaining boards other than the analog subscriber board among the boards constituting the SM are removed. , The two MPU boards, the TRU board, and the analog subscriber board are interconnected in the shelf by inserting the two MPU boards and the test board instead of the removed board.

According to an embodiment of the present invention, the existing board in the shelf accommodating analog subscribers among the SM parts of the existing 5ESS switch is removed, and the board of the present invention is mounted at that location to perform the function of the overall IP network matching packet switching system. I can. In other words, it has the effect of being able to recycle and use the existing shelf, analog subscriber board, subscriber line, etc. in the system as they are in operation without recognizing the service difference according to the change of the present invention switching system in which the existing subscriber changes.

Accordingly, it is possible to reduce the installation area compared to the existing while recycling the existing operation system, thereby reducing the investment cost.

In addition, from the operator's point of view, since it is a system composed of simply one shelf by operating with the IP packet switch of the present invention, it is relatively simplified, and management and operation are easy, and maintenance is simple, thereby reducing the operating cost (OPEX).

In addition, since it is composed of an IP network, it is possible to change the network configuration flexibly, and it is easy to apply modifications by allowing it to operate as a system composed of one shelf. There is an effect of minimizing the risk of interruption of a large number of subscriber services due to a failure such as an overload of the common part.

1 is a diagram schematically showing a network matching structure in a conventional wireline voice telephone service.
2 is a schematic block diagram of a typical 5ESS exchange.
3 is a diagram showing a specific configuration of the SM shown in FIG. 2.
4 is a diagram schematically showing an example in which an IP network matching system for analog subscribers of a 5ESS switch according to an embodiment of the present invention is used.
5 is a schematic configuration diagram of an IP network matching system using an analog subscriber board of a 5ESS switch according to an embodiment of the present invention.
6 is a flowchart illustrating an operation when an IP network matching system according to an embodiment of the present invention receives an event signal from an analog subscriber station.
7 is a flowchart illustrating an operation when an IP network matching system according to an embodiment of the present invention receives an IP packet from an IP network.
8 is a flowchart illustrating an operation when an IP network matching system according to an embodiment of the present invention performs an internal diagnosis and a subscriber test.
9 is a flowchart illustrating an operation when an IP network matching system according to an embodiment of the present invention receives an analog voice signal from an analog subscriber station.
10 is a flowchart illustrating an operation when an IP network matching system according to an embodiment of the present invention receives a voice IP packet from an IP network.
11 is a diagram illustrating an example of a configuration in which components of an IP network matching system according to an embodiment of the present invention are mounted in one shelf.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary. In addition, terms such as "... unit", "... group", and "module" described in the specification mean a unit that processes at least one function or operation, which can be implemented by hardware or software or a combination of hardware and software. have.

First, the configuration of a general 5ESS switch 10 will be described.

2 is a schematic block diagram of a general 5ESS switch 10.

Referring to Figure 2, the 5ESS switch 10 includes an AM (Administrative Module) 11, CM (Communications Module) 12, and SM (Switching Module) (13-1, ..., 13-M).

AM(11) and CM(12) are connected through DSCH(Dual Serial Channel)(21), and CM(12) and SM(13-1, …, 13-M) are NCT(Network Control and Timing) link It is connected through, and consists of a configuration that is connected through a control signal, timing, and serial channel between each module.

The AM 11 manages a central computing function, that is, a matching function necessary to operate the entire system and a function of a switching system.

CM(12) functions to provide consistent communication between SM(13-1, …, 13-M) and between AM(11) and SM(13-1, …, 13-M), and SM(13 -1, ..., 13-M) and AM (11) and between any two SMs (13-1, ..., 13-M) to transmit call processing and management messages to include a message switch function.

SM(13-1, …, 13-M) provides call processing function as a distributed switching unit function, and the first stage of switching network, circuit and trunk device functions.

Meanwhile, the analog subscriber board physically connected to the analog subscriber terminal is mounted on the SMs 13-1, ..., 13-M, and the configuration is as shown in FIG. 3.

3 is a diagram illustrating a specific configuration of the SM shown in FIG. 2.

Here, since the configurations of the plurality of SMs 13-1, ..., 13-M are the same, in FIG. 3, one SM 13-1 will be used as an example to describe the configuration.

Referring to FIG. 3, a plurality of interfaces 34-1, …, 34-L corresponding to the analog subscriber board are controlled by the module controller 32, and PCM-formed subscriber voice signals from the time slot interchanger 33 It receives the time slot allocation of and is connected to the CM 12 and the AM 11 through the upper link interface 31, and finally performs an operation of transmitting voice to the PSTN under the control of the AM 11.

In an embodiment of the present invention, the analog subscriber board of the 5ESS switch 10, that is, a plurality of interfaces 34-1, …, 34-L is used as it is to configure an IP network matching system for analog subscriber terminals. It is characterized by that.

Hereinafter, an IP network matching system for analog subscribers of a 5ESS switch according to an embodiment of the present invention will be described.

4 is a diagram schematically showing an example in which an IP network matching system for analog subscribers of a 5ESS switch according to an embodiment of the present invention is used.

Referring to FIG. 4, an IP network matching system using an analog subscriber board of a 5ESS switch (hereinafter referred to as'IP network matching system') 100 is an analog subscriber terminal 200-1 through a subscriber line 210. , …, 200-N) and connected to the IP network 300 through the Ethernet line 400.

The IP network matching system 100 converts the analog voice signal from the analog subscriber terminals 200-1, …, 200-N through the subscriber line 210 into IP packets, and converts the IP network 300 through the Ethernet line 400. ) To the SSW (Soft Switch) 310, and also receives the IP packet transmitted from the SSW 310 and converts it into a corresponding analog voice signal, and the analog subscriber terminal (200-1, …, 200-N) To pass.

In addition, an Element Management System (EMS) 500 that performs network operation and management is connected to the IP network 300. In an embodiment of the present invention, the EMS 500 instructs the IP network matching system 100 to diagnose the inside of the analog subscriber board (shown later) and test the subscriber line, and receive and display the diagnosis and test results. can do.

As described above, in the embodiment of the present invention, the IP network matching system 100 using the analog subscriber board of the 5ESS switch is used to provide an IP address for the analog subscriber terminals 200-1, …, 200-N of the existing 5ESS switch. Matching to the network 300 may be possible.

Hereinafter, an IP network matching system 100 using an analog subscriber board of a 5ESS switch according to an embodiment of the present invention will be described in more detail.

5 is a schematic configuration diagram of an IP network matching system 100 using an analog subscriber board of a 5ESS switch according to an embodiment of the present invention.

5, the IP network matching system 100 according to an embodiment of the present invention includes a first Main Process Unit (MPU) board 110, a second MPU board 120, and a Test and Ring Unit (TRU). ) Board 130 and analog subscriber boards 140-1, ..., 140-K.

The first MPU board 110 and the second MPU board 120 are connected to the IP network 300, respectively, and analog subscriber boards 140, …, 140-K connected through a UART (Universal Asynchronous Receiver/Transmitter) communication method. ) To provide call processing and service of the voice exchange function to the analog subscriber terminals 200-1, …, 200-N. Here, the first MPU board 110 and the second MPU board 120 are implemented in a redundant configuration, and if a failure occurs in either side, the analog subscriber terminals 200-1, …, 200-N are continuously It operates as a function that switches over to the other normal side to enable service. For example, the first MPU board 110 is the main processing board, and the IP network matching service for the analog subscriber terminals 200-1, …, 200-N through the analog subscriber boards 140, …, 140-K However, if a failure occurs in the first MPU board 110, the second MPU board 120, which detects this, replaces the first MPU board 110, and the analog subscriber board 140, …, 140-K It is implemented in a redundant configuration so that the IP network matching service can be continuously provided to the analog subscriber terminals 200-1, …, 200-N. For example, the second MPU board 120 monitors the state of the first MPU board 110 through the redundancy channel 101 and operates as active or standby. Since the method of implementing such a redundant configuration is well known, detailed descriptions of the contents are omitted here. Therefore, hereinafter, only the first MPU 110 will be described, but those of ordinary skill in the art will easily understand that this description can be equally applied to the second MPU board 120.

The TRU board 130 is connected to the first MPU board 110 in a UART communication method similarly between the first MPU board 110 and the analog subscriber boards 140, ..., 140-K, and the first MPU board 110 ), the subscriber test is performed through the output test of the subscriber's telephone line under control from), and the analog subscriber terminals (200-1, …, 200-N) connected through the analog subscriber boards 140, …, 140-K A low ring, for example a 20 Hz ring, is generated and supplied.

The analog subscriber boards 140, ..., 140-K are connected to the first MPU board 110, the second MPU board 120 and the TRU board 130 on one side, and the analog subscriber terminal 200-1, on the other side. …, 200-N), and performs signal transmission between the first MPU board 110 and the second MPU board 120 and the analog subscriber terminals 200-1, …, 200-N. In addition, diagnosis inside the board is performed according to an internal diagnosis instruction from the first MPU board 110. These analog subscriber boards 140, ..., 140-K are the same as those of the conventional 5ESS analog subscriber boards, so a detailed description thereof will be omitted here.

Since the analog subscriber boards 140, ..., 140-K have the same configuration, for convenience of description, the following description will be made using one analog subscriber board 140-1.

Hereinafter, the IP network matching system 100 according to an embodiment of the present invention will be described in more detail using the first MPU board 110, the TRU board 120, and the analog subscriber board 140-1. .

First, the first MPU board 110 includes a UART signal processing unit 111, an L3 switch unit 112, a time division multiplexing (TDM) switch unit 113, a voice IP conversion unit 114, and a main control unit ( 115). In addition, the TRU board 130 includes a ring generating unit 131 and a subscriber testing unit 132. In addition, the analog subscriber board 140-1 includes a signal processing unit 1410, a diagnostic processing unit 1420, and a subscriber processing unit 1430.

In the first MPU board 110, the UART signal processing unit 111 is connected through the TRU board 130 and the analog subscriber board 140-1 and the control bus 102, and signals using a UART communication method between each other. To transmit. For example, the analog subscriber board 140-1 converts an event (hook-on, hook-off, flash) signal generated in the analog subscriber terminal 200-1 into a UART signal and transmits it to the first MPU board 110, The first MPU board 110 converts the control signal transmitted from the IP network 300 into a UART signal, and the signal processing unit 1410 or the diagnostic processing unit 1420 or the TRU board 130 of the analog subscriber board 140-1 It is transmitted to the ring generating unit 131 or the subscriber test unit 132 of.

The L3 switch unit 112 transfers a control signal for call processing transmitted from the main control unit 115 and a voice packet signal transmitted from the voice IP conversion unit 114 to the IP network 300, and the IP network 300 The signal transmitted from is transmitted to the main control unit 115 or the voice IP conversion unit 114.

The TDM switch unit 113 is connected to the subscriber processing unit 1430 of the analog subscriber board 140-1 and the PCM (Pulse Code Sampling) bus 103 to provide an analog voice signal between the analog subscriber board 140-1. The PCM signal corresponding to is transmitted.

In addition, the TDM switch unit 113 performs a switching operation of converting the PCM signal transmitted from the analog subscriber board 140-1 into a signal usable by the voice IP conversion unit 114. Since the TDM switch unit 113 is well known, a detailed description thereof will be omitted.

The voice IP conversion unit 114 performs a packetization operation for transmitting the voice signal switched by the TDM switch unit 113 to the IP network 300 and transfers the packetization to the L3 switch unit 112, and also the L3 switch unit 112 The packet signal transmitted from) is converted into a voice signal and transmitted to the TDM switch unit 113.

The main control unit 115 controls the UART signal processing unit 111, the TDM switch unit 113, and the L3 switch unit 112. Specifically, the control signal transmitted from the UART signal processing unit 111 is converted to the L3 switch. It is transmitted to the IP network 300 through the unit 112, and the control signal transmitted from the IP network 300 through the L3 switch unit 112 is received to the UART signal processing unit 111 or the TDM switch unit 113. Deliver.

Next, in the TRU board 130, the ring generating unit 131 performs a function of generating a ring of a preset frequency, and specifically, a ring creation request from the first MPU board 110 through the control bus 102 If there is, for example, a 20 Hz ring is generated and supplied to the analog subscriber terminal 200-1 connected to the analog subscriber board 140-1 through the control bus 102.

The subscriber test unit 132 performs a subscriber test through an output test of a subscriber telephone line according to a request from the first MPU board 110 through the control bus 102. Thereafter, the subscriber test unit 132 transmits the subscriber test result to the first MPU board 110 through the control bus 102.

Next, in the analog subscriber board 140-1, the signal processing unit 1410 uses the UART communication method through the control bus 102 by receiving an event signal (control signal) received from the analog subscriber terminal 200-1. And transmits it to the UART signal processing unit 111 of the first MPU board 110, and conversely, receives the control signal transmitted from the UART signal processing unit 111 of the first MPU board 110, and receives the analog subscriber terminal 200- 1).

The diagnosis processing unit 1420 receives a diagnosis signal from the first MPU board 110 through the control bus 102, performs diagnosis inside the analog subscriber board 140-1, and transmits the diagnosis result to the control bus 102. It is transmitted to the first MPU board 110 through.

The subscriber processing unit 1430 is connected through the analog subscriber board 140-1 and the PCM bus 103, and converts the analog voice signal received from the analog subscriber terminal 200-1 into a corresponding PCM signal, for example, PCM. V5.2 is converted into a protocol signal and transmitted to the TDM switch unit 113 of the first MPU board 110, and also receives the PCM signal transmitted from the first MPU board 110 and converts it into a corresponding analog audio signal. It is transmitted to the corresponding analog subscriber terminal 200-1.

Hereinafter, the operation of the IP network matching system 100 using the analog subscriber board of the 5ESS switch according to the embodiment of the present invention will be described. In the following example, for convenience of explanation, one analog subscriber terminal 200-1 and one analog subscriber board 140-1 are used.

6 is an IP network matching system 100 according to an embodiment of the present invention.

First, an operation when an event signal (hogg-off/hook-on/flash) for call processing is received from the analog subscriber station 200-1 will be described.

6 is a flowchart illustrating an operation when the IP network matching system 100 according to an embodiment of the present invention receives an event signal from the analog subscriber station 200-1.

6, the signal processing unit 1410 of the analog subscriber board 140-1 receives an event signal generated by the analog subscriber terminal 200-1 as an analog signal (S100).

Thereafter, the signal processing unit 1410 of the analog subscriber board 140-1 transmits the event signal to the UART signal processing unit 111 of the first MPU board 110 in a UART communication method through the control bus 102 ( S110).

Next, the UART signal processing unit 111 of the first MPU board 110 transmits the event signal received from the signal processing unit 1410 of the analog subscriber board 140-1 through the control bus 102 to the first MPU board 110. ), the internal control signal is converted into an internal control signal used in the main control unit 115, and the main control unit 115 converts the internal control signal transmitted from the UART signal processing unit 111 into an IP packet (S120), and the L3 switch unit 112 ) Through the IP network 300 (S130). Here, the IP packetization may be, for example, a protocol (Media Gateway Control (MEGACO)/Sessioin Initiation Protocol (SIP)) IP packetization.

As described above, according to an embodiment of the present invention, a call processing signal such as an event signal generated from the analog subscriber terminal 200-1 is received through the analog subscriber board 140-1 of the existing 5ESS exchange, and the corresponding control An IP network matching operation may be performed by converting the packet into an IP packet and transferring it to the SSW 310 of the IP network 300.

Next, an operation in the case of receiving an IP packet, which is a control packet for call processing, from the IP network 300 will be described.

7 is a flowchart illustrating an operation when the IP network matching system 100 receives an IP packet from the IP network 300 according to an embodiment of the present invention.

Referring to FIG. 7, it is a flowchart illustrating an operation when an event signal is received from an analog subscriber station 200-1.

The L3 switch unit 112 of the first MPU board 110 receives an IP packet, which is a control packet, from the SSW 310 of the IP network 300 and transmits it to the main control unit 115 (S200).

Thereafter, the main control unit 115 converts the IP packet transmitted from the L3 switch unit 112 into an internal control signal (S210), and then the control bus 102 through the UART communication method through the UART signal processing unit 111. The signal is transmitted to the signal processing unit 1410 of the analog subscriber board 140-1 (S220).

Accordingly, the signal processing unit 1410 of the analog subscriber board 140-1 transmits the received control signal to the corresponding analog subscriber terminal 200-1 (S230).

As described above, according to an embodiment of the present invention, a control packet for call processing generated from the SSW 310 of the IP network 300 is received and converted into an analog signal, and the analog subscriber board 140-1 of the existing 5ESS exchange is ), it is possible to perform an IP network matching operation transmitted to the analog subscriber station 200-1.

Next, an operation of performing an internal diagnosis and a subscriber test for the IP network matching system 100 will be described.

8 is a flowchart illustrating an operation when the IP network matching system 100 according to an embodiment of the present invention performs an internal diagnosis and a subscriber test.

Referring to FIG. 8, settings related to internal diagnosis and subscriber test according to an embodiment of the present invention may be established in EMS 500 by an operator.

The L3 switch unit 112 of the first MPU board 110 receives an IP packet, which is a test packet, from the EMS 500 of the IP network 300 and transmits it to the main control unit 115 (S300).

Thereafter, the main control unit 115 converts the IP packet transmitted from the L3 switch unit 112 into an internal control signal (S310), and then determines whether it is an internal diagnosis or a subscriber test (S320).

If it is an internal diagnosis, the main control unit 115 instructs the internal diagnosis to the diagnosis processing unit 1420 of the analog subscriber board 140-1 through the UART signal processing unit 111 (S330), and the diagnosis processing unit 1420 is the first After performing the internal diagnosis on the analog subscriber board 140-1 according to the instruction of the MPU board 110 (S340), the diagnosis result is transferred to the UART signal processing unit 111 of the first MPU board 110 again. (S350).

On the other hand, if it is determined as the subscriber test in step S320, the main control unit 115 instructs the subscriber test to the subscriber test unit 132 of the TRU board 130 through the UART signal processing unit 111 (S360), After performing the subscriber test according to the instruction of the first MPU board 110 (S370), the subscriber test unit 132 transmits the subscriber test result back to the UART signal processing unit 111 of the first MPU board 110. (S380).

Meanwhile, when an internal diagnosis result is received from the analog subscriber board 140-1 or a subscriber test result is received from the TRU board 130, the UART signal processing unit 111 is used in the first MPU board 110. The control signal is converted into a control signal and transmitted to the main control unit 115, and the main control unit 115 converts the internal control signal transmitted from the UART signal processing unit 111 into an IP packet (S390) and transmits the IP network through the L3 switch unit 112. It transmits to the EMS 500 of (300) (S400).

As described above, according to an embodiment of the present invention, a test packet instructing a test from the EMS 500 is received, converted into an analog signal, and transmitted to the analog subscriber board 140-1 of an existing 5ESS exchange to be transmitted to the analog subscriber board. (140-1) It is possible to perform an IP network matching operation that allows internal diagnosis to be performed.

Next, the analog subscriber terminal 200-1 connected to the analog subscriber board 140-1 through the above operations is connected to the SSW 310 of the IP network 300 through the IP network matching system 100. After establishment, a description will be given of a voice signal (voice packet) transfer operation between the analog subscriber station 200-1 and the SSW 310 of the IP network 300.

First, an operation in the case of transmitting an analog voice signal from the analog subscriber board 140-1 to the SSW 310 will be described.

9 is a flowchart illustrating an operation when the IP network matching system 100 according to an embodiment of the present invention receives an analog voice signal from the analog subscriber station 200-1.

9, the subscriber processing unit 1430 of the analog subscriber board 140-1 receives an analog voice signal transmitted from the analog subscriber terminal 200-1 (S500).

Thereafter, the subscriber processing unit 1430 of the analog subscriber board 140-1 converts the analog voice signal into a PCM signal and transmits it to the TDM switch unit 113 of the first MPU board 110 through the PCM bus 103. Do (S510).

Next, the TDM switch unit 113 and the voice IP conversion unit 114 of the first MPU board 110 convert the PCM signal received through the PCM bus 103 into a corresponding IP packet (S520), and the L3 switch unit ( 112) is transmitted to the SSW 310 of the IP network 300 (S530).

As described above, according to an embodiment of the present invention, the analog voice signal transmitted from the analog subscriber terminal 200-1 is received through the analog subscriber board 140-1 of the existing 5ESS switch and converted into a corresponding IP packet. An IP network matching operation transmitted to the SSW 310 of the IP network 300 may be performed.

Next, an operation in the case of transmitting a voice IP packet from the SSW 310 of the IP network 300 to the analog subscriber board 140-1 will be described.

10 is a flowchart illustrating an operation when the IP network matching system 100 receives a voice IP packet from the IP network 300 according to an embodiment of the present invention.

Referring to FIG. 10, the L3 switch unit 112 of the first MPU board 110 receives an IP packet, which is a voice packet, from the SSW 310 of the IP network 300 (S600).

Thereafter, the voice IP conversion unit 114 and the TDM switch unit 113 convert the IP packet transmitted from the L3 switch unit 112 into a PCM signal (S610), and then, through the PCM bus 103, the analog subscriber board ( 140-1) of the subscriber processing unit 1430 (S620).

Accordingly, the subscriber processing unit 1430 of the analog subscriber board 140-1 converts the received PCM signal into a corresponding analog voice signal and transmits it to the analog subscriber terminal 200-1 (S630).

As described above, according to an embodiment of the present invention, an IP packet, which is a voice packet transmitted from the SSW 310 of the IP network 300, is received and converted into an analog voice signal. ), the IP network matching operation transmitted to the analog subscriber station 200-1 may be performed.

On the other hand, the IP network matching system 100 according to an embodiment of the present invention, as shown in Figure 11, the analog subscriber board (140, ..., 140-K) of the AM, CM, SM structure in the existing 5ESS switch. The first MPU board 110, which is a main control board that performs a control function for an IP packet service function, an IP packetization function, an IP network 300 interworking function, and a redundancy function in the shelf 600 that accommodates) And a second MPU board 120, and a TRU board 130 for supplying a ring and performing a subscriber test are newly added, and an analog subscriber board 140, …, 140-K that is recycled as a material for the existing 5ESS exchange. , General telephone subscriber lines 150-1, …, 150-N and analog subscriber terminals 200-1, …, 200-N may be accommodated as they are.

Therefore, after the board on which some functions of AM, CM, and SM are mounted from the shelf 600 of the existing 5ESS exchanger is removed, the above-described first MPU board 110, second MPU board 120 and TUR By mounting the board 130, the existing 5ESS exchanger can be recycled.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (7)

As an IP network matching system that matches an analog subscriber terminal to an IP (Internet Protocol) network,
Including analog subscriber board, main processing board and test board,
The analog subscriber board converts the analog voice signal received from the analog subscriber terminal into a corresponding PCM (Pulse Code Sampling) signal and transmits it to the main processing board, and transmits the PCM signal transmitted from the main processing board to a corresponding analog voice signal. It converts into a signal and transmits it to the analog subscriber terminal,
The main processing board converts the PCM signal transmitted from the analog subscriber board into a corresponding IP packet and transmits it to the IP network, and converts the IP packet received from the IP network into a corresponding PCM signal to the analog subscriber board. To deliver,
The test board performs a subscriber test under the control of the main processing board, generates a ring, and transmits it to the analog subscriber terminal through the analog subscriber board,
The analog subscriber board performs diagnosis inside the analog subscriber board under the control of the main processing board,
The analog subscriber board is an analog subscriber board of a Class 5 telephone electronic switching system (5ESS) that matches the analog subscriber terminal to a public switched telephone network (PSTN),
The main processing board transmits and receives control signals with the test board and the analog subscriber board through a UART (Universal Asynchronous Receiver/Transmitter) communication method control bus, and transmits and receives a PCM signal with the analog subscriber board through a PCM bus,
The main processing board instructs the test board to test a subscriber according to a test packet received from the IP network, or instructs the analog subscriber board to perform an internal diagnosis,
IP network matching system. The method of claim 1,
The main processing board is composed of the analog subscriber board and two MPU (Main Process Unit) boards connected to the IP network, respectively,
The two MPU boards are connected through a redundancy channel to enable a redundant operation between the analog subscriber board and the IP network through mutual monitoring,
IP network matching system. The method of claim 1,
The analog subscriber board transmits an event signal (hook-off/on/flash) received from the analog subscriber terminal to the main processing board through the control bus,
The main processing board receives the control from the SSW (Soft Switch) of the IP network and transfers the ring and test signals to the analog subscriber board through the control bus,
IP network matching system. The method of claim 3,
The main processing board converts a control signal transmitted from the analog subscriber board through the control bus into a corresponding control packet and transmits it to the IP network,
Receiving a control packet received from the IP network, converting it into a corresponding control signal, and transmitting it to the analog subscriber board through the control bus,
IP network matching system. The method of claim 4,
The analog subscriber board performs diagnosis inside the analog subscriber board by control of the main processing board through the control bus, and transfers the diagnosis result to the main processing board through the control bus,
IP network matching system. The method of claim 4,
The test board is connected to the main processing board through the control bus,
Performing the subscriber test by control of the main processing board through the control bus, and transmitting the result of the subscriber test to the main processing board through the control bus,
IP network matching system. The method of claim 2,
In the shelf where the board constituting the SM (Switching Module) including the analog subscriber board used in the 5ESS is mounted, remove and remove the remaining boards except for the analog subscriber board among the boards constituting the SM. The two MPU boards, the test board, and the analog subscriber board are interconnected within the shelf by inserting the two MPU boards and the test board in place of the existing board
IP network matching system.

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