JPH0223761A - Pseudo call origination/termination device for testing exchange - Google Patents

Abstract

PURPOSE:To test the normality of a function for telephone service as well automatically and efficiently by make an audible sound detector, a dial signal sender and an answer tone signal sender be common for plural lines, and connecting them as switching them time-divisionally. CONSTITUTION:A basic control part (CPU) 5 receives a command from a personal computer 1, and controls various circuits through a parallel input/output part 8 in conformity with it. The detector 6a of an audible sound (call progress tone), the dial signal sender 6b by PB signal system and the oscillator 6c of an answer tone signal operate respectively for plural lines time-divisionally as corresponding to the switching operation of a selector switch 9. Thus, a wide variety of the telephone service functions can be tested automatically and efficiently without being helped by the power of a man, and the quality evaluation of the telephone service of a high degree can be automated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pseudo call originating/terminating device for testing switching equipment and evaluating its quality.

[Conventional technology]

Conventional exchange test equipment accommodates a large number of telephone lines and mainly controls only outgoing and incoming connections to the exchange under test, and simulates the normality of the exchange's communication path and traffic durability. The main focus was to do this.

[Problem to be solved by the invention]

Conventional switchboard testing equipment is as described above, and in order to test the normality of the wide variety of telephone service functions seen today, it is necessary to manually generate calls from telephone terminals and evaluate their quality accordingly. I was in a situation where I couldn't get anything.

An object of the present invention is to provide a pseudo call originating/terminating device for switching equipment testing, which makes it possible to automatically and efficiently test the normality of a wide variety of telephone service functions without the need for such manual quality evaluation tests. With the goal.

[Means to solve the problem]

In order to achieve the above object, the present invention sends a pseudo call from a certain first line to an exchange, thereby receiving an incoming call from the exchange via a second line, and controlling the originating and receiving calls. An audible sound detector for detecting various audible tones (call progress tones) transmitted from the switching equipment side via the first line in a pseudo call originating/terminating device for testing the operating state of the switching equipment. , a dial signal transmitter that sends a dial signal based on the PB signal system to the exchange side via the first line, and an answer tone that sends a dial signal from the incoming second line to the first line side via the exchange. A signal transmitter, a plurality of lines are respectively selected as the first line and the second line, and the audible tone detector, dial signal transmitter and answer tone signal transmitter are respectively connected to the plurality of lines. It is equipped with a common switching device that switches and connects in a time-division manner.

[Effect]

In the present invention, the audible tone detector, dial signal transmitter, and answer tone signal transmitter are connected to multiple lines by switching them in a common time-division manner, thereby reducing the size and cost of the device. can be achieved.

Conventional switchboard test equipment of this type mainly tests connection and call confirmation, and does not have an audible sound detector to detect various audible tones (call progress tones), so if a connection cannot be established. , it was not possible to determine in which process the problem occurred, and it was not possible to test the normality of advanced telephone services using hooking, etc., but the present invention makes it possible to do so. This is different from the conventional technology.

〔Example〕

FIG. 3 is a block diagram showing the connection configuration of the pseudo call originating/terminating device according to the present invention. In the figure, 1 is a computer,
2 is a pseudo call originating/terminating device according to the present invention; 3 is an exchange; 4 is a pseudo call originating/terminating device according to the present invention;
is the line under test.

FIG. 4 is a signal sequence diagram between the personal computer 1 and the pseudo call originating/terminating device M2.

Referring to FIGS. 3 and 4, an outline of the exchange test operation performed by the pseudo call originating/terminating device 2 according to the present invention will first be described.

A test procedure manual is created in advance in the personal computer 1, and control commands are sent from the personal computer 1 to the pseudo call originating/receiving device 2, and the pseudo call originating/receiving device 2 controls the line under test 4 based on this.
Controls various circuits (described later) connected to the

Suppose that the personal computer 1 sends a signal 0FFO (off-hook the 0 terminal) to the transmitting/receiving device 2 according to the test procedure manual. Then, the calling/receiving device 2 off-hooks the 0 terminal connected to the exchange side and returns a completion signal to the personal computer 1. Then, PC 1 checks whether a dial tone is being output from the exchange at the 0 terminal, that is, the O
It will instruct you to detect a dial tone at the terminal. When the dial tone is detected on the sending/receiving device 2 side, a completion signal is sent to the personal computer 1.

Then, the personal computer 1 instructs the user to dial "222" from the 0 terminal using the PB double signal push button dial signal). Make the dial on the calling/receiving device 2,
When the completion signal is sent to the personal computer 1, the personal computer 1 receives it and outputs a ringback tone (RBT) at the 0 terminal.
) is detected by the calling/receiving device 2, and a completion signal is sent to the PC 1.The exchange is now calling the dial number "222". be.

If you select the destination of the dial number "222" as one terminal of the calling/receiving device 2, 16H will be sent to one terminal of the calling/receiving bag W2.
Since the ring tone (IR) of z is sent, the calling/receiving device F
2 detects this and notifies the personal computer 1 of this fact.

Then, the personal computer 1 instructs the calling/receiving device 2 to off-hook one terminal. When the transmitter/receiver device 2 takes one terminal off-hook and notifies the personal computer 1 of this fact, the personal computer 1 instructs the transmitter/receiver device 2 to send an answer tone signal from the first terminal to the exchange. When the calling/receiving device 2 sends an answer tone signal from the 1 terminal to the exchange and notifying the PC 1 of the completion, the personal computer 1 sends an answer tone signal from the exchange to the 0 terminal to the calling/receiving device 2. Since it should have been sent, it will instruct you to detect it. The calling/receiving device 2 detects the answer tone signal accordingly.

The above is a part of the exchange testing procedure, and in this manner, the calling/receiving device 2 tests the exchange according to instructions from the personal computer 1.

In view of the above operation examples, the things that should be provided on the calling/receiving device 2 side are various audible tones (
an audible tone detector that detects call progress tones);
It will be understood that there are two types: a dial signal transmitter that transmits a dial signal based on the PB signal system to the exchange side, and an answer tone signal transmitter that transmits a dial signal from the received terminal to the O terminal via the exchange. .

Please refer to FIG. 5 for specific examples of various audible sounds (call progress tones) that must be detected by the audible sound detector. There is no need to explain this again.

FIG. 1 is a circuit diagram showing one embodiment of the present invention (that is, a circuit diagram showing details of the pseudo call originating and receiving device '2 in FIG. 3).

In FIG. 1, 5 is a basic control unit (CPU), 8 is a parallel input/output unit, 6a is an audible sound (call progress tone) detector (specifically, a detector for 400 Hz and 800 Hz signals, 400/ 800HzDET), 6b is P
Dial signal transmitter (DTMF) using B signal system,
6c is an answer tone signal oscillator (specifically, 800
9 is a switching device (MPX), and 7 is a line circuit.

The basic control unit (CPU) 5 receives commands from the personal computer 1 as already explained with reference to FIG. 4, and controls various ports via the parallel input/output unit 8 in accordance with the commands.

What is important in FIG. 1 is that an audible tone (call progress tone) detector 5a, a dial signal transmitter 6b using the PB signal system, and an answer tone signal oscillator 6C are provided in multiple numbers in response to the switching operation of the switch 9. The point is that it operates on a time-division basis for lines. This point will be explained below.

FIG. 2(a) is a timing diagram showing how the audible sound detector 6a detects call progress tones in a time-division manner. In this example, the timings of the first channel (CHI) and the second channel (CH2) are illustrated assuming that four channels are detected simultaneously, that is, in a time-division manner. If there is a request for simultaneous detection involving four channels, a wait will be made.

Each of the four channels has a switch (MP
X) 9 is assumed to operate in 64L1 cycle, therefore, four switching devices (MPX) corresponding to 4 channels are connected to each other by 1
It operates with a time lag of 6m5. This switch (MP
The presence or absence of a tone signal is detected during the operating period of X). Since the specific circuit for detection is not directly related to the gist of the present invention, it will not be explained.

FIG. 2(B) is a timing diagram showing how the dial signal transmitter 6b based on the PB signal system transmits the PB double signal in a time-division manner.

This figure compares the timing when the PB multiplied signal is sent to eight lines in a time-division manner and the timing when it is sent to only one line. When sending to only one line, the minimum pause is 80 wr and the pulse width is 60 wr.
Although the PB multiplied signal of m5 is transmitted, if an attempt is made to time-divisionally transmit the PB multiplied signal to eight lines in order to implement the present invention, the minimum pause will be 480 m.

FIG. 2(c) is a timing diagram of the answer tone signal (800 Hz) output from the answer tone signal oscillator 6C. 3 seconds (30
00ms) period.

〔Effect of the invention〕

As explained above, according to the present invention, operation is performed in a time-division manner using a switching device, and an audible tone (call progress tone) detector, which has not been used in the past, is used, so that the operation is relatively simple. With a circuit configuration that does not require manual intervention,
This has the advantage that it becomes possible to automatically and efficiently test a wide variety of telephone service functions, and that quality evaluation of advanced telephone services can be automated.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
3 is a block diagram showing the connection configuration of the pseudo call originating/receiving device according to the present invention, and FIG. 4 is a timing diagram showing the operation of each part in the circuit shown in the figure. FIG. The signal sequence diagram in FIG. 5 is an explanatory diagram showing specific examples of various audible tones (call progress tones). Explanation of symbols 5... Basic control unit (CPU), 8... Parallel input/output unit, 6a... Audible tone (call progress tone)
Detector, 6b...Dial signal transmitter (DTMF) using PB signal system, 6c...Answer tone signal oscillator, 9...Switcher (MPX)

Claims (1)

[Claims] 1) A pseudo call is transmitted from a certain first line to an exchange, thereby receiving an incoming call from the exchange via a second line, and receiving and receiving calls accompanying the outgoing and receiving calls. A pseudo call originating/terminating device for testing the switching equipment that tests the operating state of the switching equipment includes an audible sound detector that detects various audible tones sent from the switching equipment side via the first line, and a dialing system using the PB signal system. a dial signal transmitter that transmits a signal to the exchange side via the first line; an answer tone signal transmitter that transmits an answer tone signal from the received second line to the first line side via the exchange; A plurality of lines are selected as the first line and the second line, respectively, and the audible sound detector, dial signal transmitter, and answer tone signal transmitter are respectively used in common for the plurality of lines in a time-division manner. A pseudo call originating/terminating device for testing an exchange, characterized by comprising a switching device for switching and connecting.