JPH01202962A - Communication system - Google Patents

Abstract

PURPOSE:To match a call and a terminal capability surely by sending a call in an ISDN while adding low-order layer matching information element and high-order layer marching information element having a correct value to the call in the ISDN in case of access from a network controller to the ISDN. CONSTITUTION:The service attribute as telephone or FAX application is specified to each relay converter. When a telephone set 1 connected to a telephone network 3, for example, accesses the telephone set 8 connected to an ISDN network 7, communication is applied via a relay converter specified for the telephone application. For example, a FAX 2 connected to the telephone network 2 sends a data to the FAX 11 connected to the ISDN 7, a DC loop is formed to the connection line of the telephone network 3 to apply dial request. Then in a call setting message of the incoming call sent from the relay converter 4 includes low order layer matching information element and high order layer matching information element, the desired connection destination is discriminated to be FAX 11 in the case of matching check.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to at least an ISDN network that is connected to each network via a relay/conversion device that is connected to an ISDN network and has a relay/conversion function between connected networks. The present invention relates to a communication method between devices, for example, when accessing an ISDN network via a telephone network.

[Prior Art] Conventionally, in the process of relaying and converting from a telephone network to an ISDN network, only protocol conversion, speed conversion, etc. were performed between the networks.

[Problems to be Solved by the Invention] Therefore, when accessing an ISDN network from a telephone network, low layer compatibility information elements and high layer compatibility information elements added to calls within the ISDN network are The values had to be determined using a separate dedicated call, or the process had to be performed without adding these information elements.

Therefore, if a facsimile machine (F
If AX) accesses ISDN, the telephone terminal will respond on ISDN.

As described above, one of the characteristics of ISDN is that the consistency check between calls and the capabilities of terminals cannot be sufficiently checked, and in the worst case, communication cannot be performed.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above-mentioned problems, and includes the following configuration as one means for solving the above-mentioned problems.

That is, a relay/conversion device connected to a network system including at least an ISDN includes a relay/conversion means for relaying/converting between the connected networks, an allocation means for allocating a service to be executed, and a means for allocating a service to be performed, and a function for responding to a called call. Connect IS
A sending means is provided for adding and transmitting a low layer compatibility information element and a high layer compatibility information element corresponding to the allocated and specified service to a call setting message when making a call to a DN network.

Further, a relay/conversion device connected to a network system including a telephone line network and an ISDN network includes a telephone network control means, an ISDN network control means, a connected telephone line network and an ISDN network.
A relaying/converting means for relaying/converting between N networks, an allocating means for allocating services to be performed for each telephone network subscriber number, and a connecting means for connecting I in response to a call from the telephone network.
A sending means is provided for adding and transmitting a low layer compatibility information element and a high layer compatibility information element corresponding to the allocated and specified service to a call setup message when making a call to an SDN network.

[Operation] In the above configuration, when accessing an ISDN from a network connection device, the device with a specific subscriber number is accessed depending on the terminal or data attributes, etc., and that device handles calls within the ISDN. A low layer compatibility information element and a high layer compatibility information element with valid values are added to ensure compatibility between the call and the capabilities of the terminal.

For example, if a relay conversion device is connected to the telephone network and ISDN, when accessing the ISDN from the telephone network, it is possible to access the device with a specific subscriber number depending on the terminal or data attributes, etc. The device adds a low layer compatibility information element and a high layer compatibility information element with valid values to a call within the ISDN to ensure compatibility between the call and the capabilities of the terminal. be.

That is, the service attributes of each relay/conversion device are specified, such as telephone use and FAX use. For example, when a telephone device connected to a telephone network accesses a telephone device connected to ISDN, communication is performed via a relay/conversion device specified for the telephone terminal. It is something.

[Example] Hereinafter, an example according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system configuration diagram of an embodiment according to the present invention, in which 1 is a telephone with "A" as the telephone network subscriber number, and 2 is a facsimile machine with "B" as the telephone network subscriber number. (FAX), 3 is a telephone network, 4 is a relay/conversion device with C" as a telephone network subscriber number and °a" as an ISDN subscriber number, 6 is E ° as a telephone network subscriber number.
7 is an ISDN l12], 8 is a telephone with an ISDN subscriber number of °d, and 9 is a fax machine with an ISDN subscriber number of °e. , 10 is a telephone having "f" as an ISDN subscriber number, and 11 is a FAX having f°° as an ISDN subscriber number.

In the system of this embodiment, the service attributes of each relay/conversion device are specified, such as telephone use and FAX use. For example, if the telephone 1 connected to the telephone network 3 is
SDN1ft! When accessing the telephone 8 connected to the telephone 17, communication is performed via a relay/conversion device specified for the telephone.

The communication control procedure in this case will be described below with reference to the transmission control sequence diagram in FIG.

The following description will be made using an example in which service attributes are specified in advance for the relay/conversion device 4 for FAX and for the relay/conversion device 5 for telephone.

First, for example, the FAX 2 connected to the telephone network 2 receives rS
A case will be explained in which data is sent to the FAX 11 connected to DN7.

The operator of FAX 2 must communicate with the other party F with whom data communication should be carried out.
Identify the AX device. Since this is data transmission to FAX II, a call request is made by forming a DC loop on the telephone network 3 connection line, etc., and the relay/conversion device 4 whose service attributes are specified for FAX using a telephone number key etc. Input the assigned telephone number "c" into the telephone network 3 (process
), the relay/converter 4 responds to this, and the FAX 2
When a communication path is established between the fax machine and the relay/converter 4 (processing ■), the FAX 2 dials the FAX II number "f" again (processing ■). Relay/conversion device 4 is FAX
When receiving the number “f” of the FAXll that is the destination of connection from 2, the call setup (SETUP) to be sent to the ISDN is sent.
The called party number information element in the message is "f", which is the number of the subscriber of the receiving party, and the low layer compatibility information element and the high layer compatibility information element corresponding to the specified service attribute assigned to the own device are A call setup message to be added and sent to the I5DN7 is generated (process ①). This call setup message is then sent to the I5DN7 (
Processing ■).

A telephone 10 and a FAX II are connected to the ISDN 7 subscriber number "f", but the incoming call setup message sent from the relay/converter 4 contains a low layer compatibility information element and a high layer compatibility information element. An ear consistency information element is included, and when a consistency check is performed, it is determined that the desired connection destination is FAX II. As a result, when a consistency check is performed, only FAX II responds (processing ■). Then, a communication path is set between the FAX II and the relay/conversion device 4, a communication path is formed between the FAX 2 and the FAX II,
Notify that data communication is possible (processing ■),
Now that communication between FAX2 and FAXII (7) is possible, perform the desired data communication (processing ■). After that, when either FAX outputs a recovery request (opening the telephone line, sending a recovery request command), both The communication path between the faxes will be disconnected.

Also, if the calling party is telephone 1 and the called party is telephone 10, input "D", which is the number of relay/converter 5 for the telephone, from telephone 1 to connect the relay/converter 5. By making a call and inputting the subscriber number f゛° of the other party in the same manner as above, the telephone 10 will answer instead of the FAX II.

Note that telephone 8 (subscriber number "d") and FAX 9 (subscriber number "'e"), which are independent of I5DN7, do not have the same numbers as other terminal devices, so they cannot be used to input subscriber numbers. It is possible to determine whether or not to respond immediately to the call.

[Other Embodiments] In the above explanation, the relay/converter is a telephone network and an ISDN.
Although the case where relaying and switching processing is performed between different circuit-switched networks called networks has been described, the present invention is not limited to the above case, and the present invention is not limited to the above-mentioned case, but is applicable to relaying and switching between the same networks (for example, between the same ISDN networks). It may also be a device that performs exchange processing.

Further, this exchange/relay device is not limited to those for FAX and telephone, but can also be associated with each service attribute for other information processing devices. With this configuration, it can be applied to any service.

[Effect of the invention] As explained above, according to the present invention, the ISD
When accessing N, the relay/converter is identified for each service attribute, and when a call is made to ISDN, the relay/converter having the specified service attribute is called.
The called relay/conversion device generates a call setting message by adding a low layer compatibility information element and a high layer compatibility information according to the specified service attributes, thereby preventing communication of different services between the telephone network and ISDN. This has the effect of making it easier.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment according to the present invention, and FIG. 2 is a transmission control sequence diagram in the system of this embodiment. In the figure, l... telephone with telephone network subscriber number A, 2...
... FAX with telephone network subscriber number B, 3... Telephone network, 4... Relay/converter with telephone network subscriber number C and ISDN subscriber number a, 5... Telephone network subscription relay/converter having ISDN subscriber number and ISDN subscriber number, 6...
・Relay/conversion device with telephone network subscriber number E and ISDN subscriber number C, 7...ISDN, 8...ISD
N telephone with subscriber number d, 9...FAX with ISDN subscriber number e, 10...I telephone with SDN subscriber number f, 11...I FAX with SDN subscriber number f. be.

Claims (2)

[Claims] (1) A communication method between devices connected to each network via a relay/conversion device that is connected to at least an ISDN network and has a relay/conversion function between the connected networks, and is assigned to the relay/conversion device. The relay/converter specifies the service to be executed for each assigned network subscriber number, and the relay/conversion device specifies the assigned and specified service in the call setup message when making a call to the connected ISDN network in response to the called call. A communication method characterized by adding and transmitting a corresponding low layer compatibility information element and high layer compatibility information element. (2) Connected to the telephone line network and ISDN network, with telephone network control function, ISDN network control function, connected telephone line network and ISD
A communication method between devices connected to each network via a relay/conversion device that has a relay/conversion function between N networks, and should be executed for each network subscriber number assigned to the relay/conversion device. identifying a service; said relaying and converting device performs lower layer matching corresponding to said assigned and identified service in a call setup message when placing a call to a connected ISDN network in response to an incoming call to a telephone network subscriber number; A communication method characterized by adding and transmitting a security information element and a high-level layer compatibility information element.