JPH02260996A - Isdn terminal adapter - Google Patents

Abstract

PURPOSE:To possess an individual terminal incoming function and to attain extension speaking by providing a sub-address processing part in a control part, comparing an extension number stored into a sub-address storing part with received incoming sub-address, and making the terminal, whose extension number corresponds, into an incoming state. CONSTITUTION:At the time of line wire arrival from an ISDN circuit 1, in a speaking system, an ISDN line interface 4 is connected to an analog telephone set interface 5. A call control message from the ISDN line 1 is processed by a control part 6 in the same way at the time of a line wire transmission. A sub-address processing part 9 collates the received incoming sub-address with the number of an analog telephone set interface 5 stored into a sub-address storing part 8. When the incoming sub-address is correct, the analog telephone set interface 5 at the number is controlled, and an analog telephone terminal 3 is made into the incoming state. In such a case, since the other analog telephone set interface 5 is not operated, the incoming/outgoing calls through an extension and the line wire are available.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ISDN terminal adapter, and particularly to an ISDN terminal adapter having an extension call function.

[Prior Art] Conventionally, this type of ISDN network system, as shown in FIG. It has a telephone interface 5 and a control section 6°.

The ISDN line interface 4 is connected to the control unit 6°, and the control unit 6' is connected to each analog telephone interface 5.
It is connected to the. Analog telephone interface 5
are connected to analog telephone terminals 3, respectively.

In Figure 2, ISDN terminal adapter 2° is
The line 1 and the analog telephone terminal 3 are connected to each other, and it is possible to make and receive calls between the conventionally used analog telephone terminal 3 and the SDN line. The ISDN line interface 4 performs line connection such as ISDN protocol processing. This is based on the I interface specified in the CCI TT Recommendation.

The analog telephone interface 5 connects the analog telephone terminal 3 to the control section 6' and the ISDN line interface 4.
Connect to.

The control unit 6' connects the ISDN line interface 4 and each analog telephone interface 5.

[Problems to be Solved by the Invention] Even when multiple analog telephone terminals are connected, the ISDN terminal adapter configured in this manner does not have an extension call function between them, and has a function unique to ISDN networks. There is a drawback that a certain individual terminal missed call function cannot be used. .

[Object of the invention] The present invention has been made to solve the above-mentioned difficulties.
The objective is to provide an ISDN terminal adapter with an extension call function between a plurality of analog telephone terminals, and a function where an individual end does not receive a call when a call is received.

[Means for Solving the Problems] In order to achieve the above object, an ISDN terminal adapter according to the present invention has an ISDN line interface connected to an ISDN line, and an ISDN line interface connected to each of a plurality of terminals. an ISDN terminal adapter having a terminal interface for transmitting signals; a call path switching section for connecting the ISDN line interface and the terminal interface; a sub-address storage section for storing an extension number of the terminal set in the terminal interface; subaddress processing that compares the extension number stored in the subaddress storage unit with the called subaddress received from the ISDN line or the terminal, and sends a control signal to the call path switching unit to place the terminal with the matching extension number in a receiving state; It is equipped with a section.

[Embodiment of the Invention] Hereinafter, an embodiment of the ISDN terminal adapter of the present invention will be described in detail with reference to the drawings. The ISDN terminal adapter 2 of the present invention, as shown in FIG. .

The ISDN line interface 4 is connected to the analog telephone interface 5 via the line switching section 7, and the control section 6 is connected to the ISDN line interface 4, the line switching section 7, and the subaddress storage section 8.

The control section 6 includes a sub-address processing section 9, which is activated by the control section 6.

[Operation of the Invention] The operation of the ISDN terminal adapter having such a configuration will be explained with reference to FIG. 1.

A number is set in the analog telephone interface 5 in advance, and the number is stored in the subaddress storage section 8. The number is the extension number of the analog telephone terminal 3 in FIG. 1 connected to the analog telephone interface 5.

When making an outside line call from the analog telephone terminal 3, a calling signal is sent to the call path switching section 7 via the analog telephone interface 5, and the call path switching section 7 receives the signal and sends it to the ISD.
Connect to N line interface 4. Call control of the ISDN line is performed by the control unit 6. At this time, the extension number of the analog telephone interface that made the call is sent to Layer 3 ``Call Setup (SETUP) J'', and [
Calling subaddress (CALLING PARTY 5UB
ADDRESS) Described in the J information element.

When an outside line call is received from ISDN line 1 in Figure 1, the communication system is connected to ISDN line interface 4 in the same way as when making an outside line call.
and analog telephone interface 5 are connected. I
A call control message from the SDN line 1 is also sent by the control unit 6 in the same manner as when making an outside line call. Here, the received layer 3
``Call setup (SETUP) ``CALLED PARTY 5UBADDRE'' in J message
SS) If an extension number is written in the J information element, the subaddress processing unit 9 within the control unit 6 is activated. The sub-address processing unit 9 receives the received “destination sub-address °
” and the number of the analog telephone interface 5 stored in the sub-address storage unit 8, and if it is correct, the analog telephone interface 5 with that number is controlled and the analog telephone interface 5 is
The analog telephone terminal 3 connected to is placed in a call receiving state. In this case, since the other analog telephone interfaces 5 are not operating, it is possible to make and receive calls to extensions and outside lines.

When making an extension call from the analog telephone 3 in FIG. Detects the extension number of the lever and establishes an extension connection. The analog telephone interface 5 on the receiving side is placed in a call receiving state, and the calling side analog telephone 3, the calling side analog telephone interface 5, the receiving side analog telephone interface 5, and the receiving side analog telephone 3 constitute an extension call system. In this case as well, since the other analog telephone interfaces 5 are not operating, it is possible to make and receive calls to and from internal and external lines.

In the above embodiment, the conventional terminal connected to this terminal adapter is an analog telephone terminal, but it may also be a data terminal such as a personal computer.

In this case, instead of analog telephone interface 5, a data terminal interface is used.

Further, these analog telephone interfaces and data terminal interfaces may coexist.

[Effect of the invention] As is clear from the above examples, according to the present invention,
By setting the extension number as the sub-address of the terminal, it is possible to obtain an ISDN terminal adapter that has an individual terminal call receiving function utilizing the services of the ISDN network and is also capable of making extension calls.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional ISDN terminal adapter.・ISDN line ・ISDN terminal adapter ・Terminal (analog telephone terminal) ・ISDN line interface ・Terminal interface (analog telephone terminal interface) ・Control unit ・Call route switching unit ・Sub address storage unit ・Sub address processing unit Figure 1 Agent Patent Attorney Mamoru Valley - male

Claims (1)

[Claims] In the ISDN terminal adapter, the ISDN terminal adapter has an ISDN line interface connected to an ISDN line, and a terminal interface connected to each of a plurality of terminals to perform signal transmission with the ISDN line interface.
a call path switching unit that connects the DN line interface and the terminal interface; a sub-address storage unit that stores the extension number of the terminal set in the terminal interface; and a sub-address storage unit that stores the extension number of the terminal set in the terminal interface; An ISDN terminal adapter comprising: a subaddress processing unit that compares called subaddresses received from the terminals and sends a control signal to the channel switching unit to place a terminal with a matching extension number in a receiving state.