JP3450554B2 - ATM switching equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATM switching device. Broadband ISDN is an ATM (Asyncron)
The communication is performed by the "ous Transfer Mode" (asynchronous transfer mode) method. This method divides all information into short packets called cells and sends the required number of cells according to the amount of information to be sent, so that an efficient and flexible network can be constructed. AT
In the M network, all the information about users and the OAM (supervisory information) used by the network are transmitted using cells. There is also an exchange that uses a cell to transfer information between a CPU (central control unit) inside the exchange and each internal processing function such as a self-routing switch and a line interface. The present invention relates to this type of exchange.

[0002]

2. Description of the Related Art An exchange is roughly divided into a call path control section for processing a call path and an exchange control section for controlling the switch itself. In the ATM switch, the communication path control unit has a line interface (IF),
There is a self-routing switch (SRSW) that transfers user information in the form of cells. Since the self-routing switch and the line interface are usually separate units or separate racks, there is a connection mechanism (LUIF) for connecting each other.

On the other hand, the exchange control unit has a central control unit (CPU) for storing and judging, a control system such as a bus connecting each part of the communication path with the CPU, a subscriber line signal processing unit, and a message exchange between exchanges. It consists of a signal processing system that processes transfer information, such as equipment and control equipment in the exchange, and a maintenance operation system that monitors the operation status and performs maintenance tests.

FIG. 6 is a block diagram showing a configuration example of a conventional system. In the figure, 10 is a speech path control unit for controlling the speech path, and 20 is an exchange control unit for controlling the exchange itself. In the communication path control unit 10, 11 is a subscriber line interface connected to a subscriber terminal, and 12 is a trunk line interface connected to a trunk line.
The subscriber line interface 11 and the trunk line interface 12 are line corresponding units (individual units) that terminate the line.
And a common unit connected to the line corresponding unit.

Reference numeral 13 is a self-routing switch (SRSW) which performs self-routing (route determination). The self-routing switch 13 is connected to the subscriber line interface 11 and the trunk line interface 12 by signal lines 1 and 2, respectively. Since the self-routing switch 13, the subscriber line interface 11, and the trunk line interface 12 are usually separate units or separate racks as described above, a connection mechanism (L
UIF) is required. Therefore, a connection adapter 14 is provided on the subscriber line interface side and the trunk line interface 12 side, and a connection adapter 15 is provided on the self-routing switch 13 side. Between the connection adapter 14 and the connection adapter 15, the signal line 1 or It is connected to the signal line 2.

On the other hand, in the exchange control unit 20, 21 is an exchange processor (C which stores and controls subscriber information).
PU) and 22 are maintenance operation control devices that monitor the operation status and perform maintenance tests. 23 to 25 are signal processing means using cells, 23 is an inter-exchange message transfer device (MET), 24 is a signal terminating device (SIG) for exchanging signals with subscriber terminals, and 25 is in the exchange. Switch internal control unit (AS) for exchanging messages
C). Reference numeral 26 is a control bus that connects the exchange processor 21 or the maintenance operation control device 22, the message transfer device 23, the signal terminating device 24, and the in-switch control device 25.

Reference numeral 6 is a connection adapter provided in the message transfer device 23, 7 is a connection adapter provided in the signal terminating device 24, and 8 is a connection adapter provided in the in-switch control device 25. Reference numerals 16 to 18 are connection adapters provided in the self-routing switch 13. The message transfer device 23 and the self-routing switch 13 are connected by the signal line 3 via the connection adapters 6 and 16. The signal terminating device 24 and the self-routing switch 13 are connected by the signal line 4 via the connection adapters 7 and 17. The control device 25 in the exchange and the self-routing switch 13 are connected by the signal line 5 via the connection adapters 8 and 18. A console 27 is connected to the maintenance operation control device 22.

In the system thus constructed,
A calling signal from a subscriber terminal (not shown) is received by a subscriber line interface 11 and then multiplexed with a calling signal from another subscriber line and the self-routing switch 1
Sent to 3. The self-routing switch 13 switches the route by the self-routing function. For example, the calling signal from the subscriber terminal is switched to one of the trunk line interfaces 12. At this time, the control signal from the subscriber terminal associated with the call is sent from the connection adapter 16 to the message transfer device 23 via the signal line 3 and the connection adapter 6. When the message transfer device 23 receives a control signal from the subscriber terminal (for example, the number of the subscriber terminal to call), it notifies the signal terminating device 24.
Upon receiving the signal from the message transfer device 23, the signal terminating device 24 exchanges necessary signals with the subscriber terminal.

On the other hand, by the calling signal from the subscriber terminal,
When a path is set up with the other party's subscriber terminal and a call is started, the exchange processor 21 performs processing such as start of charging and stores it in the internal memory. The in-exchange control device 25 exchanges control signals with other exchanges as needed. Further, when it is necessary to perform maintenance / inspection of the exchange, the operator inputs a test command from the console 27, and the maintenance / operation control device 22 decodes the command to perform a predetermined maintenance / operation test. .

In the signal processing system in such an ATM switch, information is transferred in all cells. Generally, subscriber line interface 11 or trunk line interface 12
Since it is more efficient to collectively process the information collected from the above, the signal processing system (the above-mentioned exchange control unit 20) is arranged after the self-routing switch 13.

[0011]

Conventionally, each device of these signal processing systems (for example, the above-mentioned message transfer device 23, signal terminating device 24, etc.) has its own connection adapter (6, 16, 7 in FIG. 6). , 17, 8, and 18 are equivalent to this)
Through the self-routing switch 13. For this reason, a plurality of ports of the self-routing switch 13 are occupied, and there is a problem that the number of connectable line interfaces is limited accordingly. Further, since the connection adapter is dedicated to the target signal processing device, it can be connected only to the port of a specific self-routing switch 13 and is not expandable.

The present invention has been made in view of the above problems, and the ports of the self-routing switch can be freely selected, and the self-routing switch and the exchange controller are connected by a pair of connection adapters. It is an object of the present invention to provide a highly expandable ATM switching device that can be used.

[0013]

FIG. 1 is a block diagram showing the principle of the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals. In the figure, 10 is a speech path control unit for controlling the speech path, and 20 is an exchange control unit for controlling the exchange itself. In the communication path control unit 10, 11 is a subscriber line interface connected to a subscriber terminal, and 12 is a trunk line interface connected to a trunk line. The subscriber line interface 11 and the trunk line interface 12 include a line corresponding unit (individual unit) for terminating the line,
It is composed of a common unit connected to the line corresponding unit.

Reference numeral 13 is a self-routing switch (SRSW) which performs self-routing (route determination). The self-routing switch 13 is connected to the subscriber line interface 11 and / or the trunk line interface 12 by signal lines 1 and 2, respectively. Since the self-routing switch 13 and the subscriber line interface 11 and the trunk line interface 12 are usually separate units or separate racks as described above, a connection mechanism (LUIF) for connecting each other is required. Therefore, a connection adapter 14 that functions as an interface is provided on the subscriber line interface side and the trunk line interface 12 side, and a connection adapter 15 that functions as an interface is provided on the self-routing switch 13 side. The sections 15 are connected to the signal line 1 or the signal line 2.

On the other hand, in the exchange control unit 20, 21 is an exchange processor (CPU) for storing and controlling. 42 to 44 are signal processing means using cells. These signal processing means 42 to 44 perform unique signal processing. In the figure, three signal processing means 42 to 44 are shown, but the number of signal processing means is not limited to this, and an arbitrary number of signal processing means can be provided. A control bus 26 connects the exchange processor 21 and the plurality of signal processing means 42 to 44.

Reference numeral 30 is a connection adapter means connected to the self-routing switch 13. The connection adapter means 30 is provided with a connection adapter 14a for connecting with the self-routing switch 13, and the self-routing switch 13 is provided with a connection adapter 15a for connecting with the connection adapter means 30. The connection adapter 14a and the connection adapter 15a are connected to one signal line 9
Connected by.

As is apparent from the above description, the self-routing switch 1 connected to the connection adapter means 30.
The configuration of the connection adapter 15a provided on the third side is the subscriber line interface 11 or the trunk line interface 1
It is the same as the connection adapter 15 that is connected to 2. That is,
It does not have to be a specially configured connection adapter. On the other hand, the connection adapter 14a provided on the connection adapter means 30 side for connecting to the self-routing switch 13 has the same configuration as the connection adapter 14 provided on the subscriber line interface 11 or the trunk line interface 12 side. That is, the connection adapter does not have to have a special configuration.

Reference numeral 40 denotes a plurality of connection adapters for connecting to the signal processing means 42 to 44 provided in the connection adapter means 30, and 41 denotes the signal processing means 42 to 44.
Is a connection adapter provided in. Connection adapter means 3
0 has the same configuration, and the connection adapters 41 provided in the respective signal processing means 42 to 44 have the same configuration. The connection adapter means 30 and each signal processing means 42 are connected to each other by the connection adapters 40 and 4.
1, connection adapter means 30 and signal processing means 43 are connected via connection adapters 40 and 41, and connection adapter means 30 and signal processing means 44 are connected via connection adapters 40 and 41. It

According to the structure of the present invention, the VC (Vi) connected to the signal processing means 42 to 44 of the signal processing system is connected.
Since the bandwidth of the virtual channel) is sufficiently smaller than the maximum bandwidth of the port of the self-routing switch 13, connect a plurality of signal processing means 42 to 44 to the connection adapter means 30 to multiplex information. Therefore, the number of ports on the self-routing switch 13 side is only one. That is, the self-routing switch 13 and the exchange control unit 20 can be connected by a pair of connection adapters. Further, by making the interface condition of the self-routing switch 13 side of the connection adapter means 30 the same as the interface condition of the line interface 11 or the trunk line interface 12 side, the port of the self-routing switch 13 of the signal processing system can be freely selected. Therefore, it is possible to configure an exchange having high expandability.

In this case, the speech path controller 10
Is a subscriber line interface 11 connected to a subscriber terminal, a trunk line interface 12 connected to a trunk line, and a self-routing switch 13 connected to the subscriber line interface 11 and / or the trunk line interface 12. It is characterized by including.

According to the configuration of the present invention, the information from the subscriber terminal or the information from the relay line can be distributed to other routes required by the communication channel control unit. Further, the connection adapter means 30 is characterized by having a function of allocating a signal path to each of the signal processing means 42 to 44.

According to the configuration of the present invention, since the connection adapter means 30 and the plurality of signal processing means 42 to 44 can be connected, one signal line 9 is provided between the connection adapter means 30 and the self-routing switch 13. Since it is only necessary to connect with, the configuration becomes simple.

Further, an identifier for identifying the signal processing means 42 to 44 is incorporated in the ATM cell flowing in the ATM switch, and the connection adapter means 30 should distribute the signal path based on this identifier. Four
It is characterized by recognizing 2 to 44.

According to the structure of the present invention, the exchange control unit 2
The identifier of the signal processing means provided in 0 is identified by the identifier, and the connection adapter means 30 recognizes and connects any of the signal processing means 42 to 44 based on this identifier. It is not necessary to provide a plurality of signal lines between the control units 10.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a block diagram showing an embodiment of the present invention. The same parts as those in FIGS. 1 and 6 are designated by the same reference numerals. The self-routing switch 13 and the subscriber line interface 11 or the trunk line interface 12 are connected by signal lines 1 and 2 via connection adapters 14 and 15, respectively. The signal line 1,
For example, a cable is used as 2. Connection adapter means 30 is provided between each device (signal processing means) of the signal processing system and the self-routing switch 13, and the self-routing switch 13 and each signal processing means are connected by the connection adapter means 30. The connection adapter 14 is provided between the self-routing switch 13 and the connection adapter means 30.
The signal line 9 is connected via a and 15a. As the signal line 9, for example, a cable is used.

The message transfer device 23 shown in FIG.
1 corresponds to the signal processing means 42 of FIG.
1 corresponds to the signal processing means 43 of FIG. 1, and the in-switch control device 25 corresponds to the signal processing means 44 of FIG.

According to the structure of the present invention, a VC (Virtu) connected to each of the signal processing means 23 to 25 of the signal processing system.
Since the bandwidth of an al channel (virtual channel) is sufficiently smaller than the maximum bandwidth of the port of the self-routing switch 13, connect a plurality of signal processing means 23 to 25 to the connection adapter means 30 to multiplex information. Therefore, the number of ports on the self-routing switch 13 side is only one. That is, the self-routing switch 13 and the exchange control unit 20 can be connected by a pair of connection adapters. Further, by making the interface condition of the self-routing switch 13 side of the connection adapter means 30 the same as the interface condition of the line interface 11 or the trunk line interface 12 side, the port of the self-routing switch 13 of the signal processing system can be freely selected. Therefore, it is possible to configure an exchange having high expandability.

The call path control unit 10 includes a subscriber line interface 11 connected to a subscriber terminal, a trunk line interface 12 connected to a trunk line, and the subscriber line interface 11 and / or the trunk line. By including the interface 12 and the self-routing switch 13 connected to the interface 12, it is possible to distribute the information from the subscriber terminal or the information from the trunk line to other routes required by the speech path control unit. Become.

The operation of the apparatus thus configured will be described below. A calling signal from a subscriber terminal (not shown) is received by the subscriber line interface 11 and then multiplexed with a calling signal from another subscriber line and sent to the self-routing switch 13. The self-routing switch 13 switches the route by the self-routing function. For example, the calling signal from the subscriber terminal is switched to one of the trunk line interfaces 12. At this time, the control signal from the subscriber terminal associated with the call is input from the connection adapter 15a through the signal line 9 to the connection adapter means 30 from the connection adapter 14a. At this time,
The self-routing switch 13 adds an identifier (CN) to a specific position of the control signal cell input to the connection adapter means 30.

FIG. 3 is a diagram showing an example of the format of the in-device cell at this time. One ATM cell has 54 octets (octet means 8 bits, and bits 0 to b in the figure).
It is composed of it7). In the "0" octet, "ACT" is an ACT (active) cell identifier. For example, when "1" is set in this bit, the cell is an ACT system cell, and when "0" is set, it is an SBY system (standby system).
“I” is a control information cell identifier. For example, when "1" is set in this bit, it indicates that the cell is valid inside the exchange, and when "0" is set, it indicates that the cell is an incoming cell. "SR
SW "is the route information of the self-routing switch that indicates where the incoming cell is distributed.

In the "1" octet, "Res" is a reserved bit, "T" is a test cell identifier, "S" is a forced insertion cell identifier, "P" is a priority class indication, and "C" is a congestion control cell identifier. is there. The next "CN" is a multiple identifier that characterizes the present invention. This multiple identifier CN is "1"
It is provided from octet to "2" octet. That is, the multiplex identifier CN is composed of 8 bits from D0 to D7, and therefore 256 signal processing means (signal processing devices) can be identified for convenience. In the case of a normal ATM cell, VPI (Virtual Path Identifier) is entered in this portion.

In the "2" octet, the "VPI" next to the CN is a virtual path identifier and indicates the destination information of the ATM cell together with the "VPI" of the "3" octet. In the "3" octet, the next "VC
"I" is a virtual channel identifier, and is combined with "4" octet and "5" octet "VCI"
The destination information of the M cell is shown. "VCI" is D0 to D
It has a 16-bit configuration up to 15. Multiple identifier C
N, virtual path identifier VPI, virtual
The channel identifier VCI is the AT
It is written in a predetermined position of the M cell. In the "5" octet, the next "PTI" is a payload type identifier that identifies whether the ATM cell is data or control signal. For example, when PTI is "000", it is user data, and when it is "100", it is a control signal. "CLP"
Is the cell loss priority, and contains "1" indicating that this cell may be discarded when it is not important. "6" octet to "53" octet is a payload indicating the data.

When the connection adapter means 30 receives the ATM cell having such a structure, it decodes the multiplex identifier CN and decides to which signal processing means it should be distributed. Then, for example, the message is transferred to the message transfer device 23. When the message transfer device 23 receives a control signal from the subscriber terminal (for example, the number of the subscriber terminal to call), the message transfer device 23 notifies the signal terminating device 24 via the control bus 26. When the signal terminating device 24 receives a signal from the message transfer device 23 via the control bus 26, the signal terminating device 24 exchanges necessary signals with the subscriber terminal.

On the other hand, by the calling signal from the subscriber terminal,
When a path is set up with the other party's subscriber terminal and a call is started, the exchange processor 21 performs processing such as start of charging and stores it in the internal memory. The in-exchange control device 25 exchanges control signals with other exchanges as needed. In this case, the cells transmitted from the signal processing means are multiplexed by adding the tag information (identification code) of the input route in the connection adapter means 30. Further, when it is necessary to perform maintenance / inspection of the exchange, the operator inputs a test command from the console 27, and the maintenance / operation control device 22 decodes the command to perform a predetermined maintenance / operation test. .

FIG. 4 is a block diagram showing a configuration example of the connection adapter means 30. The same parts as those in FIG. 2 are designated by the same reference numerals. A cell entering via the signal line 9 enters the identifier extracting unit 50 via the connection adapter 14. The identifier extracting unit 50 reads the multiple identifier CN from the ATM cell having the format shown in FIG. 3, and sends it to the identifier reading unit 51. The identifier reading unit 51 decodes the multiple identifier CN and notifies the distribution unit 52 of it. The distribution unit 52 sends the cell to the signal processing means read from the multiple identifier CN. For example, if the multiple identifier CN read by the identifier reading unit 51 is “01” and the identification number of the message transfer device 23 is “01”, the distribution unit 52 sends a message via the connection adapter 40. The cell is transmitted to the transfer device 23.

On the contrary, when the control signal is sent from the signal processing means to the connection adapter means 30, the sorting unit 52 which receives the cell from the signal processing means adds the tag information (identification code) of the input route and multiplexes it. Through the identifier reading unit 51 and the identifier extracting unit 50, and the connection adapter 14
To the signal line 9.

As described above, according to the present invention, the signal processing means provided in the exchange control unit 20 is identified by the identifier, and the connection adapter means 30 selects one of the signal processing means 23 to 25 based on this identifier. Since it is recognized and connected, it is not necessary to provide a plurality of signal lines between the exchange control unit 20 and the communication path control unit 10.

Further, the connection adapter means 30 of the present invention is provided with a function of allocating a signal path to each of the signal processing means 23 to 25, whereby the connection adapter means 30 and a plurality of signal processing means 23 to 25 are connected. Because you can
Connection adapter means 30 and self-routing switch 13
Since only one signal line 9 needs to be connected between them, the structure becomes simple.

FIG. 5 is a diagram showing the flow of information in the ATM switch according to the present invention. This example shows the case of information transfer with the subscriber terminal 60 connected to the subscriber line interface 11. Virtual channel (VC)
There is a user virtual channel L1, a signal virtual channel L2, and a supervision virtual channel L3. The user VCL1 is a plurality of channels that transfer user information. The signal VCL2 is a channel for transferring a control signal, and the control VCL3 is a channel for transferring control information.

The user VCL1 is connected to the trunk line or another subscriber terminal 60 accommodated in the own exchange via the self-routing switch 13. Before entering the self-routing switch 13, the route of the self-routing switch 13 is written in the ATM cell by the header conversion function attached to the subscriber line interface 11 or the trunk line interface 12. The user VCL 1 switches the route by the self-routing switch 13 according to the written route.

The signal VCL2 is connected to the signal processing means 23 to 25 via the self-routing switch 13. The supervising VCL3, like the signal VCL2, passes through the message transfer device 2 via the self-routing switch 13.
3 is connected. Before these virtual channels also enter the self-routing switch 13, the self-routing switch 13 route and the connection adapter means 30 route are written in the cell by the header conversion function of the subscriber interface 11 or the trunk line interface 12. As described above, the connection adapter means 30 uses the multiple identifiers (route information) written in the cells to perform route distribution to each signal processing means.

In the above embodiment, as the information processing means,
Although three types of the message transfer device 23, the signal terminating device 24, and the in-switch control device 25 are shown, the present invention is not limited to this, and an arbitrary number of information processing means can be provided. For example, when the above-mentioned multiplex identifier CN is 8 bits, 256 signal processing means can be connected.

[0043]

As described above in detail, according to the present invention, a broadband ISDN switch using the cell transfer technique, which is connected to a subscriber terminal and / or a trunk line and controls a communication path In an ATM switching device comprising a line control unit and an exchange control unit which is connected to the communication line control unit and controls the exchange itself, the communication line control unit and the exchange control unit are connected via a connection adapter. ,
The exchange control unit is configured to include a connection adapter unit connected via the connection adapter and a plurality of signal processing units connected to the connection adapter unit, so that the port of the self-routing switch can be controlled. It is possible to provide an ATM switching apparatus which can be freely selected and which has a high expandability in which the self-routing switch and the exchange control unit can be connected by a pair of connection adapters.

In this case, the speech path control unit
A subscriber line interface connected to the subscriber terminal,
By including the trunk line interface connected to the trunk line and the self-routing switch connected to the subscriber line interface and / or the trunk line interface, the information from the subscriber terminal or the trunk line It becomes possible to distribute the information to other necessary routes in the communication path control unit.

Further, since the connection adapter means is provided with a function of allocating a signal path to each signal processing means, the connection adapter means and a plurality of signal processing means can be connected to each other. The routing switches need only be connected by a single signal line 9, which simplifies the configuration.

Further, an identifier for identifying the signal processing means is incorporated in the ATM cell flowing in the ATM switch, and the connection adapter means recognizes the signal processing means for allocating the signal path based on the identifier. According to this, the signal processing means provided in the exchange control unit is identified by the identifier, and the connection adapter means recognizes and connects any one of the signal processing means based on this identifier, so that the exchange control unit and the communication path control unit are connected. It is not necessary to provide a plurality of signal lines between them.

As described above, according to the present invention, the information is multiplexed by the connection adapter means connected to the signal processing means, and the communication path control unit and the exchange control unit are connected by only one self-routing switch port. Therefore, the number of line interfaces that can be accommodated can be increased. Further, by making the interface condition on the self-routing switch side of the connection adapter means the same as the interface condition between the subscriber line interface and the self-routing switch, the self-routing switch port of the signal processing means can be freely selected, It is possible to provide an ATM switching device with high expandability.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing a format example of an in-apparatus cell.

FIG. 4 is a block diagram showing a configuration example of connection adapter means.

FIG. 5 is a diagram showing a flow of information in an ATM exchange according to the present invention.

FIG. 6 is a block diagram showing a configuration example of a conventional system.

[Explanation of symbols]

1 signal line 2 signal lines 9 signal lines 10 Call path controller 11 Subscriber line interface 12 trunk line interface 14 Connection adapter 15 Connection adapter 20 Exchange controller 21 Switch Processor 26 Control Bus 30 Connection adapter means 40 connection adapter 41 Connection adapter 42 signal processing means 43 Signal processing means 44 signal processing means

─────────────────────────────────────────────────── ─── Continuation of front page (73) Patent holder 000005108 Hitachi, Ltd. 4-6, Kanda Surugadai, Chiyoda-ku, Tokyo (72) Inventor E ▲ Yu Hiroshi 1015, Kamiodachu, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited In-house (72) Inventor Yukihiro Doi 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yasushi Takagi 3-19-3 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Telephone Co., Ltd. (72) Inventor Takaaki Higashi 1-7-12 Toranomon, Minato-ku, Tokyo Oki Denki Kogyo Co., Ltd. (72) Inventor Koji Suzuki 5-7-1 Shiba, Minato-ku, Tokyo NEC Corporation Shares In-company (72) Inventor Yozo Oguri 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Information & Communication Division (56) Reference JP-A-2-140037 (J P, A) JP-A-3-38141 (JP, A) JP-A-3-19452 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 12/56

Claims (4)

(57) [Claims] 1. A broadband ISDN switch using a cell transfer technique, comprising a call path control unit connected to a subscriber terminal and / or a trunk line for controlling a call path, and a switch itself connected to the call path control unit. In the ATM exchange apparatus including an exchange control unit for controlling the above, the communication path control unit and the exchange control unit are connected by a single line via a connection adapter, and the exchange control unit connects the connection adapter. And a plurality of signal processing means connected to the connection adapter means. The speech path control unit identifies the signal processing means in addition to the VPI and VCI. write multiple identifiers for a predetermined position of the ATM cell, the connection adapter means decrypts multiple identifiers of the ATM cells sent from said speech path controlling means ATM switching apparatus characterized by being configured to distribute a control signal to one of a plurality of signal processing means. 2. The call path control unit is connected to a subscriber line interface connected to a subscriber terminal, a trunk line interface connected to a trunk line, and connected to these subscriber line interface and / or trunk line interface. A self-routing switch according to claim 1, characterized in that
TM exchange device. 3. The ATM switching apparatus according to claim 1, wherein the connection adapter means has a function of allocating a signal path to each signal processing and sending means. 4. An ATM cell flowing in an ATM exchange,
Incorporating an identifier for identifying the signal processing means,
4. The ATM switching apparatus according to claim 3, wherein the connection adapter means recognizes the signal processing means for allocating the signal path based on the identifier.