JPH06197384A - Subaddress dial-in control method - Google Patents

Abstract

PURPOSE:To obtain the subaddress dial-in control method in which the type of offered services is set for each caller terminal equipment and the terminal equipment is easily selected. CONSTITUTION:Upon the receipt of a setup message from a caller terminal equipment 2, a security code added to a head of an incoming call subaddress is used to retrieve tables 21, 22 in which the cross reference between the said security code and data conversion algorithm of the ciphering communication service or the voice coding system to communication data is registered, the extracted data conversion algorithm or voice coding system is executed to offer the communication service with high ciphering and the communication service with a high economical efficiency to the caller only knowing the security code.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incoming call from an external calling terminal device to a called terminal device accommodated in a private branch exchange.
The present invention relates to a sub-address dial-in control method for connecting an identification code of a called terminal device as a called sub-address in a call setup message.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a conventional sub-address dial-in control method disclosed in, for example, Japanese Patent Laid-Open No. 2-158255. In the figure, 1 is a switching network including an integrated service digital network (hereinafter referred to as ISDN) switch, and 2 is an ISDN terminal device as a calling terminal device accommodated in the switching network 1. Reference numeral 3 is a private branch exchange having a dial-in function accommodated in the exchange network 1, and 4 is an ISDN terminal equipment as a called terminal equipment accommodated in the private branch exchange 3. 5a,
5b is an IS connecting the private branch exchange 3 to the exchange network 1.
In the DN station line, when collectively referring to them, reference numeral 5
To use.

In the private branch exchange 3, 10 is a network for performing switching such as call setting.
A control unit 1 controls the network 10.
Further, in this control unit, 12 is a message analysis unit that analyzes messages such as call setup messages and release request messages, 13 is a dial number determination unit that determines dial numbers in the message, and 14 is a call setting etc. It is a call control unit that performs control. Reference numerals 15a and 15b are trunks connected to the switching network 1 via the ISDN office line 5a or 5b, and when collectively referring to them, reference numeral 15 is used.

Next, the operation will be described. Here, the exchange network 1 accommodates various terminal devices including other private branch exchanges and ISDN terminal devices 2 not shown, and the network 10 of the private branch exchange 3 has an ISDN terminal device 4
A plurality of various terminal devices including is stored. For example,
When making a call from the ISDN terminal device 2 to the ISDN terminal device 4 using the dial-in function of the private branch exchange 3, the called subaddress in the call setup message can be used as the dial-in number.

In this case, the trunk 15a is received from the switching network 1 via the ISDN office line 5a, and the call setting message is transferred to the control unit 11. In the control unit 11 of the private branch exchange 3, the message analysis unit 12 analyzes the type of the received message and, in the case of a call setting message, transfers the called subaddress in the message to the dial numeral determination unit 13 to dial. Let the in-number etc. be judged. The determination result is notified to the call control unit 14 and the call control unit 1
The ISDN terminal device 4 of the extension is called by the control of the ISDN terminal device 4 and the trunk 15 which receives the call from the ISDN terminal device 2 of the calling side is responded by the ISDN terminal device 4.
And setting control of the path on the network 10 between and.

In the conventional private branch exchange, the same I
The service provided when an incoming call is received via the SDN station line 5 is the same regardless of the type of the external ISDN terminal device 2, and therefore, when the confidential communication service is provided, the incoming trunk 15 A method for assigning a data conversion algorithm to each is adopted, and trunk 1 for incoming calls is used.
The confidential communication service is executed according to the data conversion algorithm corresponding to 5.

[0007]

Since the conventional sub-address dial-in control method is configured as described above, the data conversion algorithm of the confidential communication service is set for the trunk 15 for incoming calls. There is a problem that the number of incoming trunks 15 that can provide the confidential communication service by the data conversion algorithm is limited, the use efficiency of the incoming trunks 15 is deteriorated, and the provided services are not easily changed. It was

The present invention has been made to solve the above problems, and the type of service provided to an external terminal device using the dial-in function can be set for each caller. , The purpose is to obtain a sub-address dial-in control method whose selection is easy.

[0009]

A subaddress dial-in control method according to a first aspect of the present invention registers a correspondence relationship between a security code and a data conversion algorithm of a confidential communication service in a table provided in a private branch exchange. The called sub-address with the security code added to the head is transmitted from the calling terminal device, and the private branch exchange searches for and executes the corresponding data conversion algorithm of the confidential communication service from the security code.

Further, in the sub-address dial-in control method according to the present invention, the correspondence between the security code and the voice coding system for the communication data is registered in the table provided in the private branch exchange. The called terminal sends out a called sub-address with a security code added at the beginning, and the private branch exchange searches for and executes a voice encoding method for the corresponding communication service from the security code.

According to a third aspect of the subaddress dial-in control method of the present invention, a security code, a data conversion algorithm for a confidential communication service, and a voice coding method for communication data are stored in a table provided in a private branch exchange. The correspondence is registered in advance, and the called sub-address with the security code added at the beginning is sent from the calling terminal device, and the private branch exchange uses the security code to convert the data to the data conversion algorithm of the corresponding confidential communication service or the voice encoding to the communication data. It searches for a method and executes it.

[0012]

In the private branch exchange according to the invention described in claim 1,
When the call setup message is received from the calling terminal, the security code added to the beginning of the called subaddress is used to search the table in which the correspondence between the security code and the data conversion algorithm of the confidential communication service is registered. By executing the extracted data conversion algorithm, it is possible to set the type of confidential communication service to be provided for each calling terminal device, and realize a sub-address dial-in control method that can be easily selected.

In the private branch exchange according to the second aspect of the invention, when the call setup message is received from the calling terminal device, the security code and the communication data are added using the security code added to the head of the called subaddress. It is possible to set the type of voice encoding system to be provided for each calling terminal by searching the table in which the correspondence with the voice encoding system is registered and executing the extracted voice encoding system. A sub-address dial-in control method that is easy to select is realized.

The private branch exchange according to the third aspect of the invention, when receiving the call setup message from the calling terminal device, uses the security code added to the head of the called subaddress to carry out the security code and the confidential communication. By searching the table in which the correspondence between the data conversion algorithm of the service and the voice coding method for communication data is registered and executing the extracted data conversion algorithm or voice coding method, the type of service to be provided can be determined. A sub-address dial-in control method that can be set for each calling terminal device and is easy to select is realized.

[0015]

EXAMPLES Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the invention described in claim 1. In the figure, 1 is a switching network,
2 is an ISDN terminal device as a calling terminal device, 3 is a private branch exchange, 4 is an ISDN terminal device as a called terminal device,
Reference numeral 5 is an ISDN office line, 10 is a network, 11 is a control unit, 12 is a message analysis unit, 13 is a dial numeral determination unit, 14 is a call control unit, and 15 is a trunk. Since these are the same as or equivalent to those, detailed description will be omitted.

Further, 16 is a storage unit in the control unit 11, and 17 and 18 are set in the storage unit 16 as a table in which the correspondence between the security code and the data conversion algorithm of the confidential communication service is registered. 3 is a security code table and a data conversion algorithm table. According to the example shown in the figure, the security code table 17 has three types of data conversion algorithm identifiers “1” to “3” and three types of four-digit security codes “1111” to “3333”. In the table (data conversion algorithm table) 18, three types of data conversion algorithms “A”, “B”, for communication data, corresponding to the data conversion algorithm identifiers “1” to “3”, are registered. "C" is registered.

Next, the operation will be described. Private branch exchange 3
ISDN terminal equipment 4 accommodated in the IS is connected to the exchange network 1 in which the private branch exchange 3 is accommodated.
When making a call from the DN terminal device 2 using the dial-in function of the private branch exchange 3, the ISDN terminal device 2 uses the dial-in number or the like for the called-in subaddress in the call setup message as in the conventional case. Terminal device 4
The identification code for identifying is set and transmitted. At this time, the ISDN terminal device 2 adds, for example, a 4-digit security code to the beginning of the destination subaddress and sends it in order to select the data conversion algorithm of the confidential communication service provided by the private branch exchange 3.

The private branch exchange 3 connects the ISDN office line 2 to the ISD
The message received by the trunk 15 via the N station line 5 is analyzed by the message analysis unit 12 of the control unit 11. As a result of the analysis, if the message type identifies the call setup message, the presence / absence of the called sub-address is determined. If the called sub-address is present, the dial code judging unit 13 uses the security code added to the head thereof. Then, the security code table 17 is searched to extract the associated data conversion algorithm identifier.

Further, the service request content is identified by the destination subaddress, and the security code table 1
Referring to the data conversion algorithm table 18 using the data conversion algorithm identifier obtained in the search of 7,
The data conversion algorithm to be used is determined and the determination result is notified to the call control unit 14. For example, if the security code added to the destination sub-address is “1111”, the data conversion algorithm identifier “1” is extracted by searching the security code table 17, and the data referred to based on the data conversion algorithm identifier “1”. The data conversion algorithm "A" determined by the conversion algorithm table 18 is sent to the call control unit 14, and the call control unit 14 receives the data conversion algorithm "A".
According to the algorithm, the communication data is converted and the confidential communication is performed.

Of course, the number of digits of the security code and the number of destination subaddresses can be changed in accordance with the number of terminal devices accommodated in the private branch exchange 3 and the number of data conversion algorithms.

Example 2. In the first embodiment described above, the case where the communication data is converted to enhance the confidentiality is described, but the communication data is voice-encoded to improve the economic efficiency of communication. May be applied to. FIG. 2 is a block diagram showing an embodiment of such an invention as set forth in claim 2, and corresponding portions are shown in FIG.
The same reference numerals are given and their explanations are omitted. In the figure,
Reference numerals 19 and 20 are a table (security code table) and a voice encoding method table which are set in the storage unit 16 and in which correspondences between security codes and voice encoding methods for communication data are registered. According to the illustrated example, the security code table 19 has 3
Types of audio coding method identifiers “1” to “3” and three types of four-digit security codes “1111” to
Correspondence with "3333" is registered, and three types of speech coding schemes for communication data are registered in the speech coding scheme table 20 in correspondence with the respective speech coding scheme identifiers "1" to "3". "A", "B", and "C" are registered.

Next, the operation will be described. In this case, I
The SDN terminal device 2 adds, for example, a 4-digit security code for selecting the voice coding system provided by the private branch exchange 3 to the beginning of the called subaddress in the call setup message and sends it. When the private branch exchange 3 receives the call setup message, the private branch exchange 3 sends the call setup message to the message analysis unit 1 of the control unit 11.
If it is a call setup message, it is determined whether or not there is a called subaddress. If there is a destination sub-address, the dialed-number determining unit 13 searches the security code table 19 based on the security code at the head thereof, and extracts the associated voice encoding identifier.

Further, the service request contents are identified by the destination sub-address, and the security code table 1
By referring to the speech coding scheme table 20 using the speech coding scheme identifier obtained in the search of No. 9, the speech coding scheme to be used is determined, and the call control unit 14 is notified of the determination result. For example, the security code is "1111"
If so, the speech coding method identifier “1” is extracted by searching the security code table 19, and the speech coding method “A” determined by the speech coding method table 20 referred to by using it is call-controlled. The call control unit 14 is sent to the unit 14 and performs voice coding of the communication data according to the voice coding method "A", thereby improving the economic efficiency of communication.

The number of digits of the security code, the number of digits of the destination subaddress, and the like can be changed according to the number of terminal devices accommodated in the private branch exchange 3 and the number of voice coding systems. .

Example 3. In each of the above embodiments, communication data is converted to enhance confidentiality, or speech data is encoded for communication data to individually apply to communication economic efficiency. However, it is also possible to apply to both of them simultaneously. FIG. 3 is a block diagram showing an embodiment of such an invention as set forth in claim 3, in which 21, 21 and 22 are set in the storage unit 16, and a security code and a data conversion algorithm for communication data and Security code table and table (secret / voice coding selection table) as a table in which correspondence with the voice coding method is registered
Is. According to the illustrated example, the security code table 21 includes two types of data conversion algorithm identifiers “1” and “2”, and one type of audio encoding method identifier “3”, and three types of four digits each. Correspondence relations with security codes “1111” to “3333” are registered, and two types of communication data corresponding to the identifiers “1” to “3” are registered in the confidential voice / speech coding selection table 22. The data conversion algorithms "A" and "B" and one type of audio coding method "A" are registered. The other parts are given the same reference numerals as the corresponding parts in FIG. 1 and their explanations are omitted.

Next, the operation will be described. Also in this case,
The ISDN terminal device 2 adds, for example, a 4-digit security code for selecting the data conversion algorithm or the voice coding system provided by the private branch exchange 3 to the head of the called subaddress in the call setup message and sends it. The private branch exchange 3 having received the message analyzes the call setting message in the message analysis unit 12 of the control unit 11, and if it is a call setting message, determines whether there is a called subaddress. If there is a destination sub-address, the dialed-number determining unit 13 searches the security code table 21 based on the security code at the head thereof, and extracts the associated data conversion algorithm identifier or voice encoding identifier.

Further, the service request content is identified by the destination sub-address, and the security code table 2
By using the data conversion algorithm identifier or the voice encoding method identifier obtained in the search of No. 1 to refer to the confidential talk / voice encoding selection table 22, the data conversion algorithm or the voice encoding method to be used is determined, and The call control unit 14 is notified of the determination result. For example, if the security code is "1111", the data conversion algorithm identifier "1" is extracted from the security code table 21, and the data conversion determined by the confidential / speech coding selection table 22 referred to by using the data conversion algorithm identifier. The algorithm "A" is sent to the call control unit 14, and the call control unit 14 performs data conversion of communication data with an algorithm according to the data conversion algorithm "A". Also,
If the security code is "3333", the speech coding method identifier "3" is extracted, and the call control unit 14 refers to the confidential talk / speech coding selection table 22 using the speech coding method to determine the speech coding method "3". The voice data of the communication data will be encoded according to A ″.

The number of digits of the security code, the number of digits of the destination subaddress, etc. can be changed in accordance with the number of terminal devices accommodated in the private branch exchange 3, the number of data conversion algorithms, and the number of voice coding systems. Of course.

[0029]

As described above, according to the invention described in claim 1, when the call setting message is received from the calling terminal device, the security code is added to the head of the called sub-address, and the security is concerned. Since a table in which the correspondence between the code and the data conversion algorithm is registered is searched and the extracted data conversion algorithm is configured to be executed, a highly confidential communication service is provided to the caller whose security code is known. The sub-address dial-in control method can be provided in which the type of the confidential communication service to be provided can be set for each calling terminal device and the selection thereof is easy.

According to the second aspect of the invention, when the call setting message is received from the calling terminal device, the security code and the voice code are added by using the security code added to the head of the called subaddress. Since it is configured to search the table in which the correspondence with the scheme is registered and execute the extracted voice coding scheme, the economically efficient communication service is limited to the caller whose security code is known. It is possible to provide a sub-address dial-in control method in which the type of the voice coding system to be provided can be set for each calling terminal device and the selection thereof is easy.

According to the third aspect of the invention, when the call setup message is received from the calling terminal device, the security code added to the head of the called subaddress is used to convert the security code and the data conversion algorithm. And the table (speech coding method) are registered to search the table, and the extracted data conversion algorithm or the speech coding method is executed, so that the communication service and the economic efficiency are highly confidential. It is possible to provide a good communication service only to the caller whose security code is known, the type of service to be provided can be set for each calling terminal device, and it is easy to select the sub-address dial-in. The control method is effective.

[Brief description of drawings]

FIG. 1 is a block diagram showing a sub-address dial-in control method according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a sub-address dial-in control method according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a sub-address dial-in control method according to a third embodiment of the present invention.

FIG. 4 is a block diagram showing a conventional sub-address dial-in control method.

[Explanation of symbols]

 1 Switching Network 2 Calling Terminal Equipment (ISDN Terminal Equipment) 3 Private Branch Exchange 4 Called Terminal Equipment (ISDN Terminal Equipment) 17 Table (Security Code Table) 18 Table (Data Conversion Algorithm Table) 19 Table (Security Code Table) 20 Table (Voice coding method table) 21 table (Security code table) 22 table (Secret / voice coding selection table)

Claims (3)

[Claims] 1. An originating code connected to a switching network in which the private branch exchange is accommodated, wherein an identification code of a called terminal device accommodated in the private branch exchange having a dial-in function is used as a called subaddress in a call setup message. In the sub-address dial-in control method for connecting a call from a call terminal device to the called terminal device, a table in which correspondence between a security code and a data conversion algorithm of a confidential communication service is registered is provided in the private branch exchange, and the call origination is performed. When the private branch exchange receives the call setup message from the terminal device and adds the security code to the head of the called sub-address, the private branch exchange uses the security code added to the head of the called sub-address to save the table. A search is performed and the confidential communication server associated with the security code is searched. A sub-address dial-in control method, characterized by executing a Bis data conversion algorithm. 2. An originating code connected to the exchange network in which the private branch exchange is accommodated, wherein the identification code of the called terminal device accommodated in the private branch exchange having the dial-in function is used as the destination subaddress in the call setup message. In the sub-address dial-in control method for connecting a call from the call terminal device to the called terminal device, a table in which the correspondence between the security code and the voice coding method for communication data is registered is provided in the private branch exchange, and The security code is added to the beginning of the called sub-address from the call terminal device and transmitted, and when the private branch exchange receives the call setup message, the table is created using the security code added to the beginning of the called sub-address. And voice coding to the communication data associated with the security code. A sub-address dial-in control method characterized by executing a method. 3. An originating code connected to the exchange network in which the private branch exchange is accommodated, wherein the identification code of the called terminal device accommodated in the private branch exchange having the dial-in function is used as the destination subaddress in the call setup message. In the sub-address dial-in control method for connecting a call from the call terminal device to the called terminal device, the private branch exchange has a correspondence between the security code, the data conversion algorithm of the confidential communication service, and the voice coding method for the communication data. A registered table is provided, and the security code is added to the beginning of the called subaddress from the calling terminal device and transmitted, and when the private branch exchange receives the call setup message, it is added to the beginning of the called subaddress. Search the table using the security code,
A sub-address dial-in control method, which executes a data conversion algorithm of the confidential communication service associated with the security code or a voice encoding method for the communication data.