JPH02124654A - Terminal test equipment - Google Patents

Abstract

PURPOSE:To attain the communication test in a real time includiug the test of a connection over two channels with economy and a simple operation by providing an exclusive processing unit and a switching circuit. CONSTITUTION:In the case of conducting a test from the operator of a terminal equipment 15 to a terminal equipment 17, the terminal equipment 15 and a central processing unit 1 send/receive call control information via an LAPD circuit 7, a basic interface circuit 4 through a basic interface line 13 to decide an operating communication channel B1. Since the central processing unit 1 controls a switching circuit 6 to connect B1 channels 9, 10, the terminal equipments 15, 17 are able to be communicated to attain the communication test between the terminal equipments. when the transfer of the call from the terminal equipment 17 to the terminal equipment 16 is requested, the central processing unit 1 controls similarly the switching circuit 6 to connect idle B2 channels 11, 12, the terminal equipments 16, 17 can be communicated to attain the communication test between terminal equipments.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal testing machine, and more particularly to a terminal testing machine used for testing terminals connected to an ISDN user network.

[Conventional technology]

As shown in FIG. 2, the conventional terminal testing machine has terminals 25,
The B1 + 82 channels of the basic interface circuits 20 and 21 to which 26, 27, and 28 are connected are fixedly connected to each other, and the basic interface circuit 2
The 0.21 D channel was connected to a dedicated interface circuit 22 for connecting general-purpose protocol analyzers 23 and 24 for controlling call information. For example, in response to a call originating from the terminal 25, key operations on the protocol analyzer 23 are performed to transmit and receive call control information, and in response to an incoming call to the terminal 27, the protocol analyzer Send and receive call control information by performing 24 key operations,
Thereby, the terminal 25 and the terminal 27 were connected to each other, and a call and data communication test was performed with each other.

[Problem to be solved by the invention]

In the conventional terminal tester described above, a protocol analyzer is connected to each basic interface circuit for the purpose of line control. A dedicated interface circuit is required for this connection, and multiple protocol analyzers are also used, which increases the scale of the test equipment. In addition, in order to communicate between terminals, it is necessary to perform key operations on multiple protocol analyzers to send and receive call control information.
Due to the complexity of operation, testing of call control in real time is not possible. Furthermore, each B of the basic interface circuit
1. Since the B2 channels are fixedly connected, the B
, , there is a problem in that it is not possible to test connections across B2 channels.

The purpose of the present invention is to provide an economical and simple operation by providing a dedicated processing unit and a switching circuit connected to channels B, B, and B2, as well as real-time testing, including testing connections across channels B, B, and B2. The purpose of the present invention is to provide a terminal testing machine that can perform communication tests.

[Means to solve the problem]

The terminal tester of the present invention includes a central processing unit that executes a program and controls various devices and circuits, a storage device that stores the program, and an input/output control device that controls input and output of information to and from the outside. CCITT Recommendation ■Two basic interface circuits that configure channels in the 2B+D format based on the 430 basic user network interface, a switching circuit that connects the two B channels of the two basic interface circuits, and a This configuration includes two LAPD circuits that are connected and control the D channel protocol.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

A central processing unit 1 that executes programs and controls various devices and circuits includes a storage device 2 that stores programs via a common bus, an input/output control device 3 that controls input and output of information to and from the outside, and a 2B+D Basic interface circuits 4 and 5 having channels configured in the format, and a switching circuit 6 that connects to the two B channels of the basic interface circuit 4.5.
and LAPD circuits 7 and 8 which are connected to the basic interface circuits 4 and 5 and control the D channel protocol. Basic interface circuit 4゜5 and switching circuit 6
Between B1 channels 9 and 10 and B2 channels 11.
It is connected with 12. The basic interface circuit 4 is
It is connected via a basic interface line 13 to a terminal 15.16, and the basic interface circuit 5 is connected via a basic interface line 14 to a terminal 17.18.

Next, the operation will be explained.

When the operator of the terminal 15 performs a test in which a call is made to the terminal 17, the terminal 15 and the central processing unit 1 are connected to the LAPD circuit 7.
and basic interface circuit 4 and basic interface line 1
3, and determines the communication channel to be used.

Here, it is assumed to be the B1 channel. When the central processing unit 1 receives the call control information and recognizes that the connection destination is the terminal 17, it transmits the call control information to the terminal 17 via the LAPD circuit 8, the basic interface circuit 5, and the basic interface line 14. Send. When the terminal 17 responds, the central processing unit 1 controls the switching circuit 6 to connect the Bl channel 9 to the B channel 10, so that the terminal 15 and the terminal 17 can communicate with each other, and a communication test between the terminals is performed. be able to. Next, assume that terminal 17 requests to transfer this call to terminal 16. The central processing unit 1 puts the B channels 9 and 10 currently in use on hold, and uses the call control information received from the terminal 17 to connect the LAPD circuit 7 and the basic The call control information is sent to the terminal 16 via the interface circuit 4 and the basic interface line 13, and the switching circuit 6 is controlled to switch to the vacant B2.
Since the channel 11 and the B2 channel 12 are connected, the terminal 17 and the terminal 16 can communicate with each other, and a communication test between the terminals can be performed.

Next, when the terminal 17 is restored, the central processing unit 1 controls the switching circuit 6 to connect the B1 channel 9 and the B2 channel 11 that are on hold, so that the terminal 6 to 15 and the terminal 16 are not able to communicate with each other. This makes it possible to perform communication tests between terminals. B1 channel 10 and B at the same time
2 channel 12 will be restored. When the communication test between the terminals 15 and 16 is completed, the central processing unit 1 sends and receives call control information to and from each terminal, and restores each device to its original state.

〔Effect of the invention〕

As explained above, the present invention includes a dedicated processing device, B,
By providing a switching circuit connected to the B, , and B2 channels, it is economical and easy to operate, and it is also possible to perform communication tests in real time, including tests of connections spanning the B, , and B2 channels.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional terminal testing machine. Basic interface circuits 4, 51... Central processing unit, 2... Storage device, 3... Input/output control device, 4.5, 20.21...・Basic interface circuit, 6...Switching circuit, 7, 8...
...LAPD circuit, 9°10...B1 channel, 11.12...B2 channel, 13.14
...Basic interface line, 15.16,17
, 18, 25, 26, 27° 28...terminal, 2
2... Dedicated interface circuit, 23.24.
...protocol analyzer. Agent: Susumu Uchihara, patent attorney Figure 2

Claims (1)

[Claims] A central processing unit that executes programs and controls various devices and circuits, a storage device that stores the programs, an input/output control device that controls input and output of information to and from the outside, and a CCITT recommendation I430 basic user network interface. Two basic interface circuits that configure channels in the basic 2B+D format, a switching circuit that connects to the two B channels of the two basic interface circuits, and a switching circuit that connects to the basic interface circuit and controls the protocol of the D channel. A terminal testing machine characterized by having two LAPD circuits.