JPH0393337A - Personal computer used in common with pseudo network terminator - Google Patents

Abstract

PURPOSE:To facilitate the test for a terminal equipment by switching an LSI for layer as a terminal equipment for a layer of a network terminator, and selecting the use of software for the terminal equipment into the use of the software for an artificial network terminator. CONSTITUTION:In the case of use of an artificial network terminator, it is normally possible to set an LSI of a layer 1 as a terminal equipment to an LSI of a layer 1 as a network terminator by a switch command. Thus, an LSI 5 of a layer 1 as a terminal equipment is selected to an LSI of a layer 1 as a network terminator, a transformer 6 as a terminal equipment connecting to an ISDN line is switched to a 1st transformer 4 and the use of a software operated as a terminal equipment is switched to the use of a software 3 for an artificial terminator. Thus, when a switching command is issued, the use of the artificial network terminator is attained and the test of the terminal equipment connecting to an S bus is easily conducted without a trouble.

Description

[Detailed Description of the Invention] [Summary] I Personal computer as a terminal for SDN (
Regarding a personal computer that also doubles as a pseudo network termination device, it is possible to test terminals connected to the ISDN S bus without much effort. With the aim of providing a personal computer that can easily be used as a pseudo network termination device, the PC has the function of storing software that operates as an ISDN terminal in its memory and connecting it to an ISDN line as a terminal. It stores the software for the pseudo network terminating device that operates from the terminating device to the other party's terminal, and also provides a first transformer that can be connected to the ISDN line as a network terminating device.When used as a pseudo network terminating device, it provides switching instructions. , the LSI for layer 1 as a terminal is switched to the setting for layer 1 of the network terminal equipment, and the setting of the ISDN as a terminal is changed to
The transformer connected to the line is switched to the first transformer, and the use of the software for the terminal is switched to the use of the software for the pseudo network termination device.

[Industrial application field]

The present invention enables a personal computer as an ISDN terminal to be used as an ISDN terminal.
This invention relates to a personal computer that can also be used as a pseudo network termination device and is capable of testing terminals connected to a DN S bus.

With the start of ISDN line service in recent years, ISDN S
It is necessary to test the terminals connected to the bus, and for this purpose, a device with the function of a pseudo network termination device is required.

An overview of the necessary operations as this pseudo network termination device will be explained using FIG.

Terminals 30 and 31 connected to the ISDN S bus are each connected to the switching network 33 via network termination devices 32 and 34, and when the terminal 30 communicates with the terminal 31, layer 1
Synchronization is established between the network terminal devices 32 at layer 2, a link is established with the exchange WI 33 at layer 2, and TEI (Te
rminal Endpoint Identif
At layer 3, an exchange connection operation is performed with the other terminal 31 via the exchange network 33, and at layers 4 to 7, data communication or phone calls are performed.

Here, the necessary operations as a pseudo network terminal device are as follows:
On the other hand, it performs operations from the network terminal device 32 to the other party's terminal 3l.

The device with the function of this pseudo network termination device is IS
It is desirable to be able to easily test terminals connected to the S bus of the DN.

[Conventional technology]

Conventionally, a protocol analyzer is used to test terminals connected to the ISDN S bus.

This protocol analyzer can test connections using control channels (DCH) from layer 1 to layer 3, and can also test information channels (BICH, B2CH) by having software for layers 4 and above. It is possible to test up to communication using .

When conducting a test, the protocol analyzer is connected to the S/T point of the S bus as shown in FIG.

[Problem to be solved by the invention]

However, there is a problem in that a protocol analyzer must be prepared in order to test a terminal connected to the ISDN S bus, which is time-consuming.

An object of the present invention is to provide a personal computer that can also be used as a pseudo network termination device, allowing easy and hassle-free testing of terminals connected to the ISDN S bus.

[Means to solve the problem]

FIG. 1 is a block diagram of the principle of the present invention.

As shown in FIG. 1, software l that operates as an ISDN terminal is stored in the memory 2, and the ISD
The memory 2 of the personal computer that has the function of connecting to the N line stores the software 3 for the pseudo network termination device that operates from the ISDN network termination device to the other party's terminal, and also stores the software 3 for the pseudo network termination device that can be connected to the ISDN line as a network termination device. 1 transformer 4 is provided, and when used as a pseudo network termination device, the LSI 5 for layer I as a terminal is switched to the setting for layer I of the network termination device by a switching instruction, and the rsD as a terminal is
Software 1 that switches the transformer 6 connected to the N line to the first transformer 4 and operates as the terminal.
The use of the software 3 for the pseudo network terminal device is switched from using the software 3 to the software 3 for the pseudo network terminal device.

[For production]

According to the present invention, the software 1 that operates as an ISDN terminal is stored in the memory 2, and the software 1 that operates as an ISDN terminal is stored in the memory 2.
Software 3 for a pseudo network termination device that operates from the ISDN network termination device to the other party's terminal is stored in the memory 2 of the personal computer that has the function of connecting to the line, and a first software that can be connected to the ISDN line as a network termination device is stored. ．． When a transformer 4 is installed and used as a pseudo network termination device, it is usually possible to set the layer 1 LSI as a terminal to the layer 1 LSI as a network termination device by a switching instruction. Switch the LSI 5 for layer I of the network terminal device to the setting for layer I of the network terminal device, and also switch the ISD as a terminal.
Software l that switches the transformer 6 connected to the N line to the first transformer 4 and operates as the terminal.
The use of the software 3 for the pseudo network terminal device is switched from using the software 3 to the software 3 for the pseudo network terminal device.

Therefore, it is normally used as a terminal connected to the ISDN S bus, and when testing a terminal connected to the S bus, it can be used as a pseudo network termination device by giving a switching instruction. Therefore, it is possible to easily test terminals connected to the S bus without much effort.

〔Example〕

FIG. 2 is a block diagram of a personal computer that also serves as a pseudo network termination device according to an embodiment of the present invention, and FIG. 3 is a diagram showing the connection state in a normal case and during a terminal test in an embodiment of the present invention.

In the figure, 10 is a computer control processor, 11 is a memory section, l2 is a keyboard controller, l3 is a floppy disk drive, 14 is a hard disk drive, and 27
is an ISDN board, 16 in the ISDN board 27 is a personal computer expansion slot bus, l7 is an interface, I8 is an ISDN board processor, l9 is an ISDN board memory section, 20 is a layer 2 control section for information channel Bl, 21
22 is a layer 2 control unit for information channel B2, and 22 is a layer 1 control unit for information channel B2.
A control unit, 23 is a codec, 24 is a terminal, a switch LSI for switching a transformer for a network termination device, 4 is a transformer that can be connected as a network termination device, 6 is a transformer that can be connected as a terminal, 25 is a handset, 26 is a keyboard, 35- 3
7 indicates a terminal, and SW indicates a switch.

This ISDN board memory section 19 stores software for layers 1 to 3 when operating as a terminal and software when operating as a pseudo network termination device.

Further, the memory unit l1 stores software for operating as a terminal and software for operating as a pseudo network termination device, from layer 4 to layer 7.

When used as a terminal, connect it to the S bus as shown in FIG. 3(A) via the transformer 6 connected as a terminal,
When a command signal for exchange connection is input from the keyboard 26, layers 1 to 1 stored in the ISDN board memory section l9 are input.
When operating as a terminal up to layer 3, the layer l control unit 22, layer 2i! for information channel Bl! IJil Department 20. Controls the layer 2 control unit 2l for information channel B2, is connected to the other party's terminal, and is connected to the memory unit 11.
When operating as a terminal, the handset 25 is controlled by software from layer 4 to layer 7 stored in the
You can use it to talk to the other party's device.

Therefore, when using the terminal 30 in FIG. 3 as a pseudo network termination device, for example, to test the terminal 30, switch the switch SW and issue a switching instruction from the keyboard 26 in FIG. 2 via the keyboard controller 12. The control processor 10 uses layer 4 stored in the memory section 11.
- The software is used when operating as a pseudo network termination device up to layer 7, and the ISDN board 9 interface 18 operates as a pseudo network termination device up to layer 1 to layer 3 stored in the ISDN board memory section 19. Try to use software that works.

In addition, the layer 1 control unit 22 controls the L of layer 1 as a terminal.
mv SI! Since it is usually possible to set the layer I LSI as the terminal device to the layer 1 LSI as the network termination device, and also set the layer I LSI as the terminal device as the layer 1 LSI as the network termination device, and also switch LSI
24 switches the connection to the S bus to the transformer 4, which can be connected as a network termination device, instead of the transformer 6, which is connected as a terminal.

When this happens, it becomes possible to operate as the pseudo network terminal device described above using FIG. 5, and the terminal 30 can be tested.

That is, the terminal is normally used as a terminal, but when necessary, it can be switched to a pseudo network termination device and the terminal can be tested, so the terminal can be easily tested without much effort.

〔Effect of the invention〕

As explained in detail above, according to the present invention, ISDN S
This has the effect of making it easier to test terminals connected to the bus without much effort.

[Brief explanation of drawings]

Figure 1 is a block diagram of the principle of the present invention. Figure 2 is a block diagram of a personal computer that also serves as a pseudo network termination device in an embodiment of the present invention. Figure 3 is a diagram of the embodiment of the present invention in a normal case and during a terminal test. FIG. 4 is a diagram showing the connection state of a protocol analyzer during a terminal test. FIG. 5 is a diagram illustrating the necessary operations as an example of a pseudo network termination device. In the figure, 1 is software for the terminal, 4 is a transformer 5 for layer 1 that can be connected as a network termination device, 6 is a transformer that can be connected as a terminal, 10 is a processor for personal computer control, 11 is a memory unit, and 12 is a keyboard controller. , 13 is a floppy disk drive, 14 is a hard disk drive, 16 is a personal computer expansion slot bus, 17 is an interface, 18 is an ISDN board processor, 19 is an ISDN board memory section, 20 is a layer 2 control section for information channel Bl, 21 2 is a layer 2 control unit for information channel B2, 22 is a layer 1 control unit, 23 is a codec, and 24 is a switch LSI for switching transformers for terminals and network termination equipment.
, 25 is a handset, 26 is a keyboard, 35 to 37 are terminals, and SW is a switch. Tori Block Diagram Figure 1

Claims (1)

[Claims] Software that operates as an ISDN terminal (1)
is stored in the memory (2) of a personal computer that has the function of connecting to the ISDN line as a terminal.
2) stores the software (3) for the pseudo network termination device that operates from the ISDN network termination device to the other party's terminal, and
The first transformer (
4), and when used as a pseudo network termination device, the LSI (5) for layer 1 as a terminal is switched to the setting for layer 1 of the network termination device by a switching instruction, and the I
The transformer (6) connected to the SDN line is switched to the first transformer (4), and the software (1) for the terminal is switched to the first transformer (4).
) to use the software for the above pseudo network termination device (3)
A personal computer that also functions as a pseudo network termination device.