JP3957608B2 - Remote access server with incoming call selection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a remote access server equipped with an incoming call selection method for selecting whether to accept an incoming call according to the type of incoming call for which a remote connection request has been made and operating a remote access server (RAS) efficiently.
[0002]
[Prior art]
In remote access to access a network device at a remote location through a communication line, identifying the incoming call connected via the communication line and performing some kind of connection control increases the load on the central processing unit. This is important in terms of preventing and avoiding a decline in information transmission capability. For example, in a connection situation where voice communication connections and data communication connections are mixed, the number of voice communication connections is large, but some data communication connections account for a fairly large percentage. In order to avoid a situation in which the connection of voice communication becomes excessive and the information transmission capability is reduced, connection restriction is performed on a specific connection. This type of regulation is common, and there are many prior arts aimed at it.
[0003]
For example, in the technology described in Patent Document 1, it is a technology related to connection restriction provided in an exchange, and in order to provide a connection restriction control method capable of restricting connection for each route, a first PBX (private branch exchange) When the incoming call received from the incoming line is relay-connected to the dedicated line by the DP channel common line, the sender side information obtained from the received call setting message and the line information of the incoming line that received the incoming call are sent to the caller side. It is stored in the call type information memory, stored in a predetermined location of a call setting message newly formed as caller side call type information, and transmitted. In addition, the second PBX has a route-specific restriction table in which the presence / absence of connection restriction for each call type information of the office line serving as the outgoing route is stored in advance for each call type information of each trunk of the incoming line. When the call setup message is received from the dedicated line, the outgoing route based on the call type information on the caller side read from the call setup message and the route number of the office line selected as the outgoing route The call selection information for the outgoing route is determined by comparing the call type information with the route type restriction table. In this way, the exchange regulates the relay connection, so that the trunk call type information on the caller side and the call type information on the outgoing line on the callee side can be used to determine whether or not there is a restriction on the outgoing route. Each connection can be restricted.
[0004]
In addition, the technique described in Patent Document 2 is a technique related to connection regulation provided in a terminal (particularly, PHS), and an information transfer type cannot be acquired unless a call connection is made once and a signal is received from the calling side. To resolve the situation, when the incoming call identification device identifies the information transfer type at the time of reception and informs the CPU, it checks whether the information transfer type set by the user exists in the called subaddress information in the received call setup message. If the information transfer type exists, this is detected, and if it does not exist, the CPU activates the voice communication control device. When the transfer type is image, data, or sound, the image communication control device, the data communication control device, and the sound communication control device are activated. The CPU rejects and disconnects the call connection if each image communication control device, data communication control device, and voice communication control device is in communication restriction, and can connect the call to the information type output device if communication restriction is not in effect To prompt the user to connect the call. In this way, information transfer type can be acquired by transmitting and receiving information before communication connection, so that the communication time can be shortened and the procedure can be simplified, and it is necessary to perform unnecessary call connection. Since there is no such thing, the load on the central processing unit is reduced.
[0005]
On the other hand, some RASs have connection restrictions as described above. If the RAS is provided with such a function, connection control intended by the administrator can be realized. Therefore, the type of incoming call is determined using an appropriate management table.
[0006]
The configuration of such a conventional management table will be described with reference to FIG. In FIG. 3, in the management table, the number of synchronous connections, the number of modem connections, and the number of PIAFS connections are taken up as row items, and the maximum allowable connection number, the used number, and the remaining used connection number are taken up as column items. Yes.
[0007]
The number of synchronous connections represents the number of synchronous connection calls to RAS.
The modem connection number represents the number of modem connection calls to the RAS.
The number of PIAFS connections represents the number of PIAFS connection calls for RAS.
[0008]
The maximum allowable number of connections represents the set number when the existing resources are utilized to the maximum.
The number of uses represents the number of connections used when the apparatus is in operation.
The remaining usable number is the remaining used number for each connection mode when the apparatus is operating, and is represented by a difference between the maximum allowable number of connections and the used number.
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 08-321879 [Patent Document 2]
Japanese Patent Laid-Open No. 10-004588
[Problems to be solved by the invention]
However, the management table of FIG. 3 has the following problems.
The first problem is that the number of connections in each connection form is the same as the maximum allowable number of connections, and therefore there is a limitation that other connection calls cannot be connected due to, for example, excessive connection due to synchronous connection calls.
The second problem is that the number of connections that can be designated from the outside is not defined with respect to the number of synchronous connections, and thus the number of connections of synchronous connection calls cannot be limited. The same applies to other connection forms.
A third problem is that the apparatus cannot be set as, for example, a PIAFS dedicated RAS immediately after startup.
[0011]
It is an object of the present invention to provide connection restriction for various connection calls described above, and in particular to provide an incoming call selection type remote access server for restricting connection of incoming calls of each connection form. Specifically, it aims at the contents described below for each claim.
[0012]
An object of the invention according to claim 1 is to provide an incoming call selection type remote access server that provides an allowable number of connections in a management table and avoids an excessive connection state exceeding the maximum allowable number of connections.
[0013]
An object of the invention according to claim 2 is to provide an incoming call selection type remote access server that avoids the complexity of resetting each time the apparatus is activated.
[0014]
It is an object of the invention according to claim 3 to provide an incoming call selection type remote access server in which an administrator intentionally corresponds to a RAS connection status.
[0015]
An object of the invention according to claim 4 is to provide an incoming call selection type remote access server that constitutes a RAS dedicated to the target connection form.
[0016]
An object of the invention according to claim 5 is to provide an incoming call selection type remote access server that constitutes a synchronous connection dedicated RAS.
[0017]
An object of the invention according to claim 6 is to provide an incoming call selection type remote access server constituting a RAS dedicated to modem connection.
[0018]
An object of the invention according to claim 7 is to provide an incoming call selection type remote access server that constitutes a dedicated RAS for PIAFS connection.
[0019]
[Means for Solving the Problems]
In order to solve such an object, the invention described in claim 1 is a remote access server equipped with an incoming call selection method for managing various connection forms in order to remotely access an information communication device at a remote location through a communication line. A call setup message detecting means for detecting a SETUP message including incoming call additional information when a remote connection request is made to the remote access server; a determining means for judging the type of an incoming call received from the SETUP message; Setting means for receiving predetermined setting information related to connection control from the outside, at least one connection processing means for performing data processing specific to the incoming call, and maximizing the number of connections for each type of incoming call and the existing resources of the incoming call Maximum allowable number of connections that indicates the number of settings when limited use, allowable number of connections set from the outside by discrimination means, operation Create a management table in which the number of used connections that indicate the number of connections used and the remaining number of usable connections that represent the difference between the number of allowed connections and the number of used connections is created. Incoming call permission setting means for performing selection is provided.
[0020]
According to a second aspect of the present invention, in the first aspect of the invention, the setting means registers the allowable number of connections in advance before starting the remote access server, and the management table is generated based on the allowable number of connections. It is characterized by.
[0021]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the allowable number of connections is changed by the determining means during activation.
[0022]
The invention described in claim 4 is characterized in that, in the invention described in any one of claims 1 to 3, the incoming call permission setting means does not permit any incoming call in a connection form other than the target connection form. To do.
[0023]
The invention described in claim 5 is the invention described in claim 4, characterized in that the target connection form is a synchronous connection.
[0024]
The invention described in claim 6 is the invention described in claim 4, characterized in that the target connection form is a modem connection.
[0025]
The invention described in claim 7 is the invention described in claim 4, characterized in that the target connection form is a PIAFS connection.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0027]
[Configuration of Example]
FIG. 1 is a configuration block diagram of the RAS 1 that receives a remote connection request. RAS 1 includes call setting message detection unit 10, MPU unit 11, data processing unit 12, modem detection unit 13, PIAFS processing unit 14, routing unit 15, incoming call permission setting unit 16, LAN 17, and setting. The unit 18 is configured.
[0028]
When a remote connection request is received from the ISDN network via the line 100, the call setting message detection unit 10 receives a SETUP message including incoming call additional information and transmits it to the MPU unit 11. Further, a disconnection request is issued via the line 100 according to the incoming / outgoing permission determination of the incoming call permission setting unit 16, or predetermined data is transmitted to the data processing unit 12.
[0029]
The MPU unit 11 determines the type of the incoming call from the SETUP message and confirms the incoming call permission setting unit 16 whether the incoming call is acceptable. Further, the external setting information input by the setting unit 18 is received, and the external setting information is reflected in the management table of the incoming call permission setting unit 16. Further, in response to the incoming / outgoing permission determination of the incoming call permission setting unit 16, the call setting message 10 and the data processing unit 12 are instructed to perform predetermined processing.
[0030]
Based on the instruction from the MPU unit 11 and the data received from the call setup message 10, the data processing unit 12 performs well-known unique data processing for the synchronous connection SETUP message, and sends the processed data to the routing unit 15. Send to. Further, the data for the modem connection SET UP message processed by the modem detection unit 13 and the data for the PIAFS connection SET UP message processed by the PIAFS processing unit 14 are received and transmitted to the routing unit 15.
[0031]
The modem processing unit 13 performs unique data processing on the SETUP message for modem connection, and sends the processed data to the data processing unit 12.
[0032]
The PIAFS processing unit 14 performs unique data processing on the SETUP message of the PIAFS connection, and sends the processed data to the data processing unit 12.
[0033]
The routing unit 15 processes each data received from the data processing unit 12, determines an outgoing line, and sends it to the LAN 17.
[0034]
The incoming call permission setting unit 16 determines the number of connections of the data processing unit 12, the modem connection unit 13, and the PIAFS connection unit 14 in order to confirm whether or not an incoming call is possible according to an instruction from the MPU unit 11. Also, external setting information from the setting unit 18 is received via the MPU unit 11, and the allowable number of connections is calculated from the number of connections described above and the allowable number set from the setting unit 18. The incoming call permission setting unit 16 generates a management table immediately after activation of the apparatus, manages the number of connections permitted to connect to the RAS 1 from the allowable number of connections based on the management table, and determines whether or not connection is possible. As a result of the determination, if it is determined that the call cannot be accepted, the incoming call is not permitted, the call setting message detection unit 10 is notified via the MPU 11 that the call cannot be received, and a disconnection request is issued via the line 100. . If it is determined that the incoming call is acceptable, the incoming call is permitted and the call setting message detecting unit 10 is notified of the incoming call permission via the MPU 11.
[0035]
The LAN 17 transmits the data processed by the routing unit 15 to the outside.
[0036]
The setting unit 18 transmits external setting information that is a basis of the allowable number of connections input by the administrator to the MPU 11.
[0037]
FIG. 2 is an image of a management table generated by the incoming call permission setting unit 16. In the present embodiment, in this management table, the number of synchronous connections, the number of modem connections, and the number of PIAFS connections are taken up as the row items, and the maximum allowable connection number, the allowable connection number, the used number, and the remaining items are listed in the column items. The number of connections used is taken up.
[0038]
The number of synchronous connections represents the number of synchronous connection calls to RAS1.
The modem connection number represents the number of modem connection calls to RAS1.
The number of PIAFS connections represents the number of PIAFS connection calls connected to RAS1.
[0039]
The maximum allowable number of connections represents the set number when the existing resources are utilized to the maximum.
The allowable number of connections represents the number of settings based on the external setting information from the setting unit 18.
The number of uses represents the number of connections used when the apparatus is in operation.
The remaining usable number is the remaining used number for each connection mode when the apparatus is operating, and is represented by a difference between the allowable number of connections and the used number.
[0040]
[Description of operation of embodiment]
Next, the operation process of this embodiment will be described.
When the entire apparatus is activated, the incoming call permission setting unit 16 generates a management table for managing the connection state, and determines the number of connections of the entire apparatus from the number of ISDN lines.
Next, the incoming call permission setting unit 16 determines the number of installed modem processing units 13 and PIAFS processing units 14, and determines the number of modem connections and the number of PIAFS connections. Since the maximum number of synchronous connections does not require a special processing unit and is processed by the data processing unit 12, the number is the same as the number of ISDN lines. Thus, the maximum allowable number of connections for each connection form is calculated and registered in the management table.
Furthermore, when the external setting information is transmitted to the MPU 11 by the setting unit 18, the number of allowable connections is registered in the management table. If no setting is made by the setting unit 18, the maximum allowable number of connections and the allowable number of connections are registered in the management table as the same value.
[0041]
When there is a remote connection request to RAS 1, a SETUP message including incoming call additional information is received from the ISDN network via line 100 and transmitted to call setting message detector 10.
The call setup message detection unit 10 receives the SETUP message and transmits it to the MPU unit 11.
The MPU unit 11 determines the type of the incoming call from the SETUP message and confirms the incoming call permission setting unit 16 whether the incoming call is acceptable.
The incoming call permission setting unit 16 determines the number of connections of the data processing unit 12, the modem connection unit 13, and the PIAFS connection unit 14 in order to confirm whether or not an incoming call is possible according to an instruction from the MPU unit 11. The allowable number of connections is calculated from the number of connections and the allowable number set from the setting unit 18. As a result, if it is determined that the call cannot be accepted, the incoming call is not permitted, the call setting message detector 10 is notified via the MPU 11 that the incoming call is not possible, and a disconnection request is issued via the line 100. If it is determined that the incoming call is acceptable, the incoming call is permitted, the call setting message detecting unit 10 is notified of the incoming call permission via the MPU 11, and the call setting message detecting unit 10 notifies the data processing unit 12. While sending predetermined data, the MPU 11 sends data to the data processing unit 12 to instruct a route to be processed.
[0042]
The data processing unit 12 processes the incoming call permission of the incoming call permission setting unit 16 as follows. First, well-known unique data processing is performed for the SETUP message of synchronous connection. This indicates that one synchronous connection call has been permitted. The incoming call permission setting unit 16 adds “1” to the number of used synchronous connections in the management table, and the remaining usable number of synchronous connections is “ 1 ”Update to subtract.
The modem connection SET UP message is transmitted to the modem detection unit 13 to cause the modem processing unit 13 to perform known unique data processing. This indicates that one modem connection call has been permitted. The incoming call permission setting unit 16 adds “1” to the number of used modem connections in the management table, and the remaining usable number of modem connections is “1”. 1 ”Update to subtract. The modem processing unit 13 sends the processed data to the data processing unit 12 again.
The PIAFS connection SETUP message is transmitted to the PIAFS processing unit 14 to cause the PIAFS processing unit 14 to perform known unique data processing. This indicates that one PIAFS connection call is permitted. The incoming call permission setting unit 16 adds “1” to the number of PIAFS connections in the management table, and the remaining usable number of PIAFS connections is “ 1 ”Update to subtract. The PIAFS processing unit 14 sends the processed data to the data processing unit 12 again. In this way, the remaining usable number can be controlled by the current number of uses and the number of allowable connections.
Based on the above operation process, the data processing unit 12 transmits the processed data to the routing unit 15.
[0043]
The routing unit 15 processes each data received from the data processing unit 12, determines an outgoing line, and sends it to the LAN 17.
The LAN 17 transmits the data processed by the routing unit 15 to the outside.
[0044]
As described above, by setting the allowable number of connections for each connection form in the management table, if the set value for the allowable number of connections is entered so as not to exceed the maximum allowable number of connections, other connection calls will be connected due to excessive connections. It is possible to avoid such a situation that it is impossible, and the RAS 1 can be operated efficiently by selecting and connecting a message that can be received by the connection permission setting unit 16.
[0045]
If the administrator uses the setting unit 18 to newly enter the external setting information while the apparatus is operating, the setting of the allowable number of connections for each connection form can be changed. The management table setting is updated, and the value obtained by subtracting the used number from the allowable number of connections of each connection form is substituted for the remaining usable number.
For subsequent remote connection requests, whether or not to accept the updated management table is selected.
[0046]
[Other embodiments of the invention]
As another embodiment of the present invention, the basic configuration is as described above. However, the configuration may be such that the device is started in a state where the allowable number of connections is stored in the device in advance and the management table is generated from the allowable number of connections. . In this way, the allowable number of connections of various connection forms can be set from the time of startup, so that resetting does not have to be performed for each startup.
[0047]
When the administrator inputs from the setting unit 18 external setting information that sets the allowable number of modem connections and the number of PIAFS connections to 0, the number of modem connections and the number of PIAFS connections used in the management table also become zero. Therefore, it can be set to count only the number of used synchronous connections. That is, it is possible to configure a RAS that accepts only a remote connection request for synchronous connection.
The operation for configuring such a dedicated connection form can also be applied to a modem connection and a PIAFS connection.
[0048]
In this embodiment, three types of connection modes, synchronous connection, modem connection, and PIAFS connection are taken up. However, when other connection modes are also accepted, a processing unit corresponding to the connection mode is provided and managed. If the number of connections of the connection form is newly provided in the item of the table row, it becomes possible to select whether or not the connection can be received.
[0049]
【The invention's effect】
As described above, in the present invention, first, the type of incoming call is determined, and whether or not connection is possible is determined before connection, so that unnecessary incoming calls can be rejected. Then, when the administrator intentionally performs the incoming call rejection setting, only the connection intended temporarily or continuously can be permitted.
[0050]
According to the first aspect of the present invention, an excessive number of connections exceeding the maximum allowable number of connections can be avoided by providing the number of allowable connections in the management table.
[0051]
According to the second aspect of the present invention, it is possible to avoid the trouble of resetting the apparatus every time the apparatus is activated.
[0052]
According to the invention of claim 3, the administrator can intentionally cope with the connection status of RAS.
[0053]
According to the invention which concerns on Claim 4, the RAS only for the target connection form can be comprised.
[0054]
According to the fifth aspect of the present invention, the synchronous connection dedicated RAS can be configured.
[0055]
According to the sixth aspect of the invention, a modem connection dedicated RAS can be configured.
[0056]
According to the seventh aspect of the present invention, a dedicated PIAFS connection RAS can be configured.
[Brief description of the drawings]
FIG. 1 is a circuit block diagram of RAS1.
FIG. 2 is an image of a management table of an incoming call permission setting unit 16;
FIG. 3 is an image of a conventional management table.
[Explanation of symbols]
1 RAS
100 Line 10 Call setting message detection unit 11 MPU unit 12 Data processing unit 13 Modem processing unit 14 PIAFS processing unit 15 Routing unit 16 Incoming call permission setting unit 17 LAN
18 Setting section

Claims (7)

A remote access server equipped with an incoming call selection method for managing various connection forms in order to remotely access an information communication device at a remote location through a communication line,
Call setup message detection means for detecting a SETUP message including incoming call additional information when a remote connection request is made to the remote access server;
Determining means for determining the type of incoming call received from the SETUP message;
Setting means for receiving predetermined setting information related to connection control from outside;
At least one connection processing means for performing specific data processing for the incoming call;
The number of connections by type of the incoming call and the maximum allowable number of connections when the existing resources of the incoming call are utilized to the maximum, the allowable number of connections set from the outside by the setting means, used during operation A management table is registered in which the number of used connections indicating the number of connections used and the remaining number of usable connections indicating the difference between the number of allowed connections and the number of used are registered, and whether or not the remote connection request can be received based on the number of allowed connections A remote access server equipped with an incoming call selection method, characterized in that it has an incoming call permission setting means for selecting 2. The incoming call selection method according to claim 1, wherein the setting means registers the allowable number of connections in advance before starting the remote access server, and the management table is generated based on the allowable number of connections. Onboard remote access server.   3. The remote access server with an incoming call selection method according to claim 1 or 2, wherein the allowable number of connections is changed by the setting means during startup. The remote access server with an incoming call selection method according to any one of claims 1 to 3, wherein the incoming call permission setting means does not permit any incoming call of a connection form other than the target connection form. 5. The remote access server equipped with an incoming call selection method according to claim 4, wherein the target connection form is a synchronous connection. 5. The remote access server with an incoming call selection method according to claim 4, wherein the target connection form is a modem connection. 5. The remote access server with an incoming call selection method according to claim 4, wherein the target connection form is a PIAFS connection.

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