JP2009094943A - Telephone exchange system, and resource sharing method and telephone exchange in telephone exchange system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively share and utilize resources which mutually belong to telephone switches. <P>SOLUTION: The telephone switch system includes a first telephone switch and a second telephone switch. The first telephone switch includes a processing contents setting means for setting processing that is executed in accordance with processing contents, a margin inquiring means for inquiring of the second telephone switch whether it has a margin for executing processing, and an allocation information transmitting means for allocating a margin for executing processing belonging to the second telephone switch and transmitting a connection request and processing to the second telephone switch. The second telephone switch includes a margin existence/absence determining means for determining whether to have a margin for executing processing of the first telephone switch, an inquiry answering means for answering whether the first telephone switch has the margin, and an arithmetic processing representatively performing means for allocating the margin for executing processing belonging to the second telephone switch to processing with no margin for execution of the first telephone switch and representatively performing arithmetic processing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a telephone exchange system, a resource sharing method in a telephone exchange system, and a telephone exchange, and more particularly to a telephone exchange system including a plurality of telephone exchanges, a resource sharing method in a telephone exchange system, and a telephone exchange.

  In recent years, with the advance of technology, IP telephones using IP (internet protocol) technology, IP call services, and the like have become widespread.

  And, telephone exchanges compatible with such telephones have been subjected to various processes due to multifunctional telephones and increased subscriptions to lines connected to the Internet.

Therefore, Patent Document 1 describes a resource sharing method by a plurality of routers.
JP 2000-69087 A

  By the way, when making a networking connection for the purpose of adding these telephones, there are cases where a large number of CID (caller identification delivery) compatible trunks or a single telephone with a CID function are installed or set.

  In this case, it is necessary for the telephone exchange system to always connect resources, and there is a problem that it is difficult to secure sufficient resources in the telephone exchange system.

  Here, CID is caller identification information, which is information transmitted to a telephone exchange when a call is made as information for identifying a sender.

  And since there is a limit on the number of resources that can be used in the telephone exchange, depending on the state in which one user is using the telephone, even if another user wants to use the telephone, the request cannot be answered. There was a problem.

  In addition, when setting up a telephone exchange and a telephone, there is a problem that a high level of skill is required for system design.

  Further, in the telephone exchange system that performs the related Networking connection, the system is operated separately even when the resources of the system-1 are insufficient due to the configuration and the system-2 has sufficient resources.

  As a result, there is a problem that a telephone exchange system that is not easy to use is configured.

  Therefore, the present invention has been made in view of the above problems, and in response to a request for a system resource of a certain telephone exchange, another telephone exchange responds to Networking, thereby sharing the resources possessed by each other. An object of the present invention is to realize a telephone exchange system that can be used effectively, a resource sharing method in the telephone exchange system, and a telephone exchange.

  The telephone exchange system according to the present invention is a telephone exchange system including at least a first telephone exchange and a second telephone exchange connected to the first telephone exchange, wherein the first telephone exchange is A processing content setting unit that sets processing to be executed according to the processing content in the arithmetic processing unit included in the first telephone exchange, and the processing set in the arithmetic processing unit is executed in the arithmetic processing unit. If there is no margin, if the second telephone exchange receives a message indicating that there is a margin by a margin inquiry means for making an inquiry as to whether or not there is room to perform the processing, and an inquiry response means, The margin for executing the processing of the second telephone exchange reserved by the second telephone exchange is allocated to the processing that the first telephone exchange cannot afford. And an allocation information transmitting means for transmitting information necessary for setting the connection request and the processing to the second telephone exchange, wherein the second telephone exchange is configured to send the inquiry by the margin inquiry means. Receiving, a margin presence / absence judging means for judging whether or not there is a margin for executing the processing of the first telephone exchange with respect to the processing contents set in the arithmetic processing means of the second telephone exchange; When there is a margin for executing the processing of the first telephone exchange by the margin presence / absence judging means, a reply is made that there is a margin for the first telephone exchange, and a margin for executing the processing is reserved. The inquiry answering means for replying that the first telephone exchange has no margin when the margin determination means has no margin for executing the processing of the first telephone exchange. And when the connection request is received by the allocation information transmitting means, information necessary for setting the process is extracted, and a margin for executing the process included in the second telephone exchange is Arithmetic processing agent means for substituting the arithmetic processing by assigning it to the processing that the first telephone exchange has no room to perform.

  A resource sharing method according to the present invention is a resource sharing method in a telephone exchange system including at least a first telephone exchange and a second telephone exchange connected to the first telephone exchange. The telephone exchange sets a processing content setting step for setting processing to be executed in accordance with the processing content in the arithmetic processing unit of the first telephone exchange, and the first telephone exchange is set in the arithmetic processing unit. In addition, when the process does not have a margin to be executed in the calculation processing step, a margin inquiry step for inquiring whether or not the second telephone exchange has a margin for executing the process; When the telephone exchange receives the inquiry in the margin inquiry step, the contents of the processing set in the arithmetic processing unit of the second telephone exchange are obtained. In the presence / absence determination step for determining whether or not there is a margin for executing the processing of the first telephone exchange, the second telephone exchange performs the processing of the first telephone exchange in the margin determination step. If there is a margin for executing the process, a reply indicating that the first telephone exchange has a margin is made, a margin for executing the processing is reserved, and in the step of determining whether there is a margin, the first telephone exchange If there is no room for executing the processing, an inquiry reply step for replying that the first telephone exchange has no room, and that the first telephone exchange has the room in the inquiry reply step. If received, the first telephone exchange executes a margin for executing the processing of the second telephone exchange reserved by the second telephone exchange. An allocation information transmitting step for transmitting a connection request and information necessary for setting the processing to the second telephone exchange, and an allocation information transmitting step. When the connection request is received, information necessary for setting the process is extracted, and the first telephone switch performs the allowance for executing the process that the second telephone switch has. And an arithmetic processing proxy step for substituting the arithmetic processing by allocating to the processing which cannot afford.

  The first telephone exchange according to the present invention includes: processing content setting means for setting processing to be executed according to processing content in the arithmetic processing means included in the telephone switch; and the processing set in the arithmetic processing means When there is no room for execution in the arithmetic processing means, there is room inquiry means for making an inquiry as to whether or not there is room for executing the processing in another telephone exchange connected to the telephone exchange, and the other telephone. When receiving from the exchange that the margin is available, the margin for executing the processing that the other telephone exchange has is allocated to the processing that the telephone exchange has no margin, and the connection request and the processing are performed. Allocation information transmitting means for transmitting information necessary for setting to the other telephone exchange.

  When the second telephone exchange according to the present invention receives an inquiry, the second telephone exchange determines whether or not there is room to execute the processing of another telephone exchange with respect to the processing contents set in the arithmetic processing means of the telephone exchange. If there is a margin for executing the processing of the other telephone exchange by the margin presence / absence judging means and the margin presence / absence judging means, the fact that the other telephone exchange has a margin is answered and the processing is executed. If there is no room for executing the processing of the other telephone exchange by the margin determination means, the other telephone exchange has no room for executing the processing of the other telephone exchange. When a connection request is received from the inquiry answering means for replying to the effect and the other telephone exchange, the information necessary for setting the processing is extracted, and the telephone exchange has the information A margin for performing the management and allocation to the other can not afford to perform the telephone exchange process, characterized in that it comprises an arithmetic processing proxy unit on behalf of processing, the.

  According to the present invention, this telephone exchange system can improve the convenience by sharing the resources of the telephone exchange and allowing the resources of other telephone exchanges to execute processing related to the load of a certain telephone exchange. Can be made.

  Therefore, in response to a request for system resources of a certain telephone exchange, another telephone exchange responds with Networking, so that the telephone exchange system can share the resources that the mutual exchanges have and can be used effectively. A resource sharing method and a telephone exchange can be realized.

  The telephone exchange system according to the present invention is the entire network-connected system in a telephone exchange system having a plurality of telephone exchanges, and is a mechanism for sharing the resources of the telephone exchange.

  Therefore, this telephone exchange system can allocate resources from the system-2 even when the resources of the system-1 are lost in the configuration of the telephone exchange system as shown in FIG. Effective utilization can be achieved.

  As a result, in the telephone exchange system according to the present invention, even when there are no resources in the telephone exchange, resources are secured by inquiring other telephone exchanges about the availability of free resources, and virtual resource management is used in a well-balanced manner. Can function.

Next, Embodiment 1 for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
(1) Configuration of Telephone Exchange System FIG. 1 shows a configuration of a telephone exchange system including two telephone exchanges as Embodiment 1 according to the present invention.

  The telephone exchange system shown in FIG. 1 includes system-1 and system-2.

  The system-1 includes a central processing unit (CPU) 100, a storage unit 110, a call control unit 120, a DSP (digital signal processor) unit 130, a single telephone control interface unit 140, and a trunk interface unit 150. ing.

  The call control unit 120 includes a networking control unit 121 and a resource control unit 122.

  In addition, the system-1 is connected to the telephone network 400 via the Trunk network 300 formed by Trunk-A, Trunk-B, Trunk-C, Trunk-D, Trunk-E, and Trunk-F.

  The CPU 100 is a processor that controls the entire system-1.

  The storage unit 110 stores various programs and data and functions as a work area when executing the programs.

  In the call control unit 120, the networking control unit 121 controls the networking connection with respect to the telephone call, and the resource control unit 122 controls the resources of the DSP unit 130.

  The DSP unit 130 functions as a CID (caller identification delivery) for acquiring caller identification information, a DTMF (dual tone multi-frequency) Tone Receiver or Tone Detector for performing a DFT (discrete fourier transform) operation, and the like.

  The single telephone control interface unit 140 is connected to a plurality of single telephones, and is connected to the single telephones A to E, the single telephone M, or the single telephone X.

  The Trunk interface unit 150 is connected to the telephone network 400 existing outside via the Trunk network 300.

  The networking interface unit 160 is connected to the system-2 via the node path 500, and plays a role of a relay function for relaying between the system-1 and the system-2.

The system-2 has the same configuration as the system-1. However, in order to identify it from the system-1, even if it is the same configuration, a reference numeral different from that of the system-1 is given.
(2) Operation of Resource Sharing Processing of Telephone Exchange System Next, the operation of resource sharing processing of the telephone exchange system shown in FIG. 1 will be described with reference to the flowcharts of FIGS.

  First, Trunk-A, Trunk-B, Trunk-C, Trunk-D, Trunk-E, and Trunk-F forming the Trunk network 300 acquire the CID via the telephone network 400 and set the reception to the system-1. .

  This Trunk network is assumed to be formed of six Trunks.

  Then, in the system-1 that has received the CID, the CPU 100 performs the reception setting of the CID service that the DSP unit 130 executes (step S11).

  Here, for example, when the Tone Detector for identifying the caller and performing the DFT operation according to the caller is set for each of the single phones A to E in FIG. It is used in a state of being always connected to 130.

  Also, the system-1 can use 16 resources.

  Therefore, since the trunk network 300 is formed of six trunks, it uses six resources and five single telephones A to E (single telephones with a CID function) use five resources. become.

  That is, 16 available resources use 11 resources by 6 CID-compatible trunks and 5 single telephones with a CID function, and the DSP unit 130 has 5 free resources.

  Therefore, when adding a single telephone, five units corresponding to available resources can be connected. However, if an attempt is made to connect the sixth and subsequent single telephones, there will be a shortage of resources.

  In this case, the single telephones A to E with the CID function always connect the DSP unit 130 as a resource, but if the CID is not set to the additional single telephone to be connected, the number of the telephones that can be simultaneously talked is five. However, it is possible to install six or more individual telephones.

  Accordingly, in the system-1, when six or more simple telephones are installed, up to five telephones can be talked at the same time. However, since there are no resources of the DSP unit 130 for executing DFT calculation and the like after the sixth telephone, the DSP The unit 130 cannot execute the DFT operation or the like.

  Therefore, the CPU 100 uses the resource control unit 122 to monitor the resources of the DSP unit 130 and determines whether there are free resources of the DSP unit 130 (step S12).

  Here, when the DSP unit 130 runs out of free resources, the CPU 100 determines whether or not the system-1 has a networking connection (step S13).

  If the CPU 100 determines that the network-1 has a networking connection, the networking control unit 121 determines whether there is a node that has not transmitted a resource request message (step S14).

  Here, the Node refers to the system-2 connected to the system-1 via the node path 500, and means a telephone exchange that operates in the same manner as the system-1.

  When the networking control unit 121 determines that there is no node that has not transmitted the resource request message, it determines that a resource to replace the DSP unit 130 has not been secured, and proceeds to step S15 to process the waiting queue. I do.

  This waiting queue refers to, for example, checking whether or not an empty resource is generated in the DSP unit 130 at predetermined time intervals (for example, 1 minute).

  If free resources of the DSP unit 130 cannot be secured during the waiting queue process, the DSP unit 130 cannot execute a DFT operation or the like, so that a call cannot be made or received.

  On the other hand, in the networking control unit 121, when there is a node that has not transmitted the resource request message, the CPU 100 inquires to the system-2 via the networking interface unit 160 (step S17).

  On the other hand, in step S12, when there is a free resource in the DSP unit 130, the CPU unit 130 controls the resource control unit 122 to execute the DSP unit 130, receives the CID, and performs the DFT operation. This can be done (step S16).

  As described above, in the system-1, the CPU 100 transmits a resource request message to the system-2 from the resource control unit 122 via the networking control unit 121 and the networking interface unit unit 160.

  Thereby, in this embodiment, when the resource control unit 222 of the system-2 sends back a free resource to the system-1, the system-1 sends the DSP unit 230 of the system-2 based on the response result. Can be used and free resources can be used.

  Here, for example, a case will be described in which when the single telephone M is OFF HOOK (that is, when the handset is picked up), the system-1 resource is exhausted.

  The resource control unit 122 of the system-1 sends a resource request message to the networking interface unit unit 160 via the networking control unit 121.

  The Networking interface unit 160 transmits a resource request message to the connected Node (that is, corresponding to the system-2 in FIG. 1) (Step S17 in FIG. 2).

  Receiving the resource request message, the networking interface unit 260 of the system-2 sends the request message to the resource control unit 222 via the networking control unit 221 (step S21 in FIG. 3).

  Next, the resource control unit 222 investigates free resources of the DSP unit 230 in its own system (step S22 in FIG. 3), and sends a reply message as a reply to the Networking interface unit unit 260 via the Networking control unit 221. .

  Here, for example, when “there is a free resource” in the DSP unit 230 of the system-2, the resource management unit unit 222 reserves and secures the free resource (step S23 in FIG. 3).

  Upon receiving this reply message, the Networking interface unit 260 returns a response to the effect that “there are free resources” to the Networking interface unit 160 of the system-1 (step S24 in FIG. 3).

  On the other hand, in step S22, the resource control unit 222 of the system-2 creates an answer that “there is no free resource” when the DSP unit 230 has no free resource (step S25 in FIG. 3). .

  In step S25 of FIG. 3, the networking connection unit 260 returns a response “no free resource” to the networking interface unit 160 of the system-1.

  The networking interface unit 160 that has received the reply message sends the content of the reply message to the networking control unit 121, and the networking control unit 121 analyzes the reply message (step S31 in FIG. 4).

  The networking control unit 121 analyzes the reply message and determines whether or not there is a free resource in the DSP unit 230 of the system-2 (step S32 in FIG. 4).

  Here, when the reply is “no free resource” of the resource in the DSP section 230 of the system-2, the process returns to step S14 in FIG. 2 to determine whether there is another Node, and the system Send a resource request message to

  On the other hand, if the DSP unit 230 of the system-2 receives a response indicating that “there is an available resource”, the networking control unit 121 of the system-1 returns a response message to the resource control unit 122. (Step S33 in FIG. 4).

  Upon receiving the response message, the resource control unit 122 analyzes the investigation result added to the response message (step S34 in FIG. 4).

  Then, the resource control unit 122 sends a resource connection request to the Networking interface unit 160 via the Networking control unit 121 and connects to a single telephone port (not shown) (Step S35 in FIG. 4).

  Further, the resource control unit 122 transmits the resource type of the single telephone M and the CID transmission data to the Networking interface 160 via the Networking control unit 121 (Step S36 in FIG. 4).

  Then, the Networking interface unit unit 160 sends a message to the Networking interface unit unit 260 of the system-2 (Step S37 in FIG. 4).

  Upon receiving this message, the Networking interface unit 260 sends this message to the resource control unit 222 via the Networking control unit 221 and analyzes the message returned from the system-1 (step S41 in FIG. 5).

  The resource control unit 222 determines whether or not the message returned from the Networking interface unit unit 160 is a resource connection request (step S42 in FIG. 5). If it is a resource connection request, the process proceeds to step S43.

  When the resource control unit 222 receives a resource connection request, the resource control unit 222 sets a resource type such as Tone Detector or DTMF Tone Receiver transmitted from the system 1 in the DSP unit 230.

  Then, the CID signal including the CID data is sent to the DSP unit 230 (step S43 in FIG. 5).

  As a result, the resource control unit 222 can use the DSP unit 230 of the system-2 by connecting the port of the system-1 and the resource DSP unit 230 by Path connection.

  Thus, the resource control unit 222 connects the single telephone M of the system-1 and the resource of the system-2 via the node Path 500 between the system-1 and the system-2.

  As a result, the single telephone M can use the DSP unit 230 of the system-2, so that it can perform a DFT operation and can function as a PB Tone Detector or a DTMF Tone Receiver.

  It has been described that the telephone exchange system according to the present invention operates as described above for the purpose of sharing the resources of the telephone exchange mutually.

  Here, FIG. 6 and FIG. 7 show sequence diagrams of the operation at the time of OFF HOOK of the single telephone and the operation of the single telephone with a CID function or the telephone line described in the telephone exchange system of the present embodiment.

The sequence diagram when the single telephone in FIG. 6 is OFF HOOK and the sequence diagram of the single telephone with a CID function in FIG. 7 are for each case where each telephone exchange uses its own DSP unit to perform each process. The flow in a telephone exchange is shown.
(3) Effects of the telephone exchange system according to the present embodiment According to the present embodiment, this telephone exchange system is used even in a region where there are many analog lines or single telephones, even when sufficient resources cannot be secured. By sharing resources, CID and Tone Detector can be used effectively.

  In the past, when making a networking connection setting, it is necessary to make a setting in consideration of securing resources, and skill such as system configuration is required for setting.

However, according to the present embodiment, this telephone exchange system does not require special skills regarding resources, and the degree of freedom is improved, so that convenience can be improved for telephone line operators and users.
(4) Other Embodiments In this embodiment, a telephone exchange system is formed from the system-1 and the system-2. However, the present embodiment is not limited to this, and a plurality of telephone exchanges can be used as a telephone exchange system. May be formed.

  In this embodiment, the DSP unit 130 and the DSP unit 230 perform DFT operations such as CID and Tone Detector. However, the present embodiment is not limited to this, and the DSP unit performs an arithmetic processing on the digital signal. Anything to do.

  In this embodiment, system-1 forms the first telephone exchange and system-2 forms the second telephone exchange. However, the present embodiment is not limited to this, and is realized by other configurations. You may make it do.

  In this embodiment, the CPU 100 forms a processing content setting unit, the resource control unit 122 forms a margin inquiry unit and an allocation information transmission unit, and the DSP unit 130 forms an arithmetic processing unit.

  Further, the resource control unit 222 forms a margin presence / absence determination unit, the networking control unit 221 forms an inquiry response unit, and the DSP unit 230 forms an arithmetic processing proxy unit.

  However, the present embodiment is not limited to this, and may be realized by other configurations.

In Embodiment 1 which concerns on this invention, it is a block diagram which shows the structure of a telephone switching system. In Embodiment 1 which concerns on this invention, it is a flowchart in the case of making an inquiry from system-1 to system-2. In Embodiment 1 which concerns on this invention, it is a flowchart in the case of returning a resource condition from the system-2 to the system-1. In Embodiment 1 which concerns on this invention, when a reply is received from the system-2, it is a flowchart in case the system-1 responds. In Embodiment 1 which concerns on this invention, when a response is received from the system-1, when a system-2 performs a connection process, it is a flowchart. In Embodiment 1 which concerns on this invention, the sequence at the time of an independent telephone is OFF HOOK is shown. In Embodiment 1 which concerns on this invention, the sequence of the independent telephone with a CID function is shown.

Explanation of symbols

100, 200 CPU
110, 210 Storage unit 120, 220 Call control unit 121, 221 Networking control unit 122, 222 Resource control unit 130, 230 DSP unit 140, 240 Single telephone control interface unit 150, 250 Trunk interface unit 160, 260 Networking interface unit 300 Trunk Network 400 Telephone network 500 node Path

Claims (8)

A telephone exchange system comprising at least a first telephone exchange and a second telephone exchange connected to the first telephone exchange,
The first telephone exchange is
Processing content setting means for setting processing to be executed in accordance with the processing content in the arithmetic processing means of the first telephone exchange;
When the processing set in the arithmetic processing means has no room to be executed in the arithmetic processing means, a margin inquiry for inquiring whether or not the second telephone exchange has room to execute the processing. Means,
When the inquiry response means receives that there is a margin, the first telephone exchange executes the margin for executing the processing of the second telephone exchange reserved by the second telephone exchange. Allocation information transmitting means for transmitting to the second telephone exchange a connection request and information necessary for setting the processing,
The second telephone exchange is
Upon receiving the inquiry by the margin inquiry means, it is determined whether or not there is room to execute the processing of the first telephone exchange with respect to the processing contents set in the arithmetic processing means of the second telephone exchange. Means for determining whether or not to afford,
When there is a margin for executing the processing of the first telephone exchange by the margin presence / absence judging means, a reply is made that there is a margin for the first telephone exchange, and a margin for executing the processing is reserved. ,
The inquiry answering means for replying that the first telephone exchange has no allowance when the allowance presence / absence judging means has no allowance for executing the processing of the first telephone exchange;
When the connection request is received by the allocation information transmitting means, information necessary for setting the process is extracted, and the first telephone exchange has a margin for executing the process. Arithmetic processing agent means to perform the arithmetic processing by assigning to the processing that can not be performed by the telephone exchange of
A telephone exchange system characterized by comprising: The processing content setting means includes
The first telephone is connected to the telephone connected to the first telephone exchange by the user's off-hook operation or the user makes a telephone call to the telephone connected to the first telephone exchange. The telephone exchange system according to claim 1, wherein a process to be executed is set in an arithmetic processing unit included in the exchange according to the processing content. The arithmetic processing means includes:
3. The telephone exchange system according to claim 1 or 2, wherein digital signal processing is performed. A resource sharing method in a telephone exchange system comprising at least a first telephone exchange and a second telephone exchange connected to the first telephone exchange,
A processing content setting step in which the first telephone exchange sets processing to be executed in accordance with the processing content in the arithmetic processing unit of the first telephone exchange;
If the first telephone exchange has no allowance for the processing set in the arithmetic processing unit to be executed in the arithmetic processing step, does the second telephone exchange have a margin for executing the processing? A margin inquiry step for inquiring whether or not,
When the second telephone exchange receives the inquiry in the margin inquiry step, the processing of the first telephone exchange is executed with respect to the processing contents set in the arithmetic processing unit of the second telephone exchange. A margin presence / absence judging step for judging whether or not there is a margin;
When the second telephone exchange has a margin for executing the processing of the first telephone exchange in the margin determination step, the second telephone exchange replies that the first telephone exchange has a margin, and An inquiry reply that reserves a margin for executing the process and responds that there is no room for the first telephone exchange if there is no room for executing the processing of the first telephone exchange in the step of determining whether there is a margin. Steps,
When the first telephone switch receives the fact that there is a margin in the inquiry reply step, the margin for executing the processing of the second telephone switch reserved by the second telephone switch An allocation information transmitting step for transmitting a connection request and information necessary for setting the processing to the second telephone exchange, and
When the second telephone exchange receives the connection request in the allocation information transmission step, the second telephone exchange extracts information necessary for setting the process, and performs the process possessed by the second telephone exchange. An operation processing proxy step for assigning a margin to be executed to a process in which the first telephone exchange does not have a margin to execute, and performing the arithmetic processing;
A resource sharing method comprising: The processing content setting step includes:
The first telephone is connected to the telephone connected to the first telephone exchange by the user's off-hook operation or the user makes a telephone call to the telephone connected to the first telephone exchange. The resource sharing method according to claim 4, wherein a process to be executed is set in an arithmetic processing unit included in the exchange according to the processing content. The arithmetic processing unit includes:
6. The resource sharing method according to claim 4, wherein digital signal processing is performed. Processing content setting means for setting processing to be executed according to processing content in the arithmetic processing means possessed by the telephone exchange,
If the processing set in the arithmetic processing means has no room to be executed in the arithmetic processing means, whether or not another telephone exchange connected to the telephone exchange has room to execute the processing. A margin inquiry means for making inquiries,
When it is received from the other telephone exchange that the margin is available, a margin for executing the processing that the other telephone exchange has is allocated to a process that the telephone exchange has no margin for, and a connection request And allocation information transmitting means for transmitting information necessary for setting the processing to the other telephone exchange;
A telephone switch characterized by comprising: Upon receipt of the inquiry, with regard to the processing contents set in the arithmetic processing means possessed by the telephone exchange, there is a margin presence / absence judging means for judging whether or not there is room to execute the processing of another telephone exchange;
If there is a margin for executing the processing of the other telephone exchange by the margin presence / absence judging means, a reply indicating that the other telephone exchange has a margin and reserving a margin for executing the processing,
If there is no room to execute the processing of the other telephone exchange by the margin presence / absence judging means, an inquiry response that replies that the other telephone exchange has no room to execute the processing of the other telephone exchange Means,
When a connection request is received from the other telephone exchange, the information necessary for setting the process is extracted, and a margin for executing the process possessed by the telephone exchange is determined by the execution of the other telephone exchange. Assigning to a process that can not afford to, and an arithmetic processing agent means to perform the arithmetic processing,
A telephone switch characterized by comprising:

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