JPH0316059B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a testing device for digital telephone equipment for conducting various tests on digital telephones and their related devices, and more specifically, Regarding the in-home control equipment that connects and controls digital telephones and other non-telephone equipment such as digital facsimile machines, functional operation tests and maintenance tests are carried out in the premises, as well as tests for communication with exchanges in the premises. This invention relates to a test device for digital telephone equipment that can also function as a telephone.

[Conventional technology]

In an integrated digital service network (ISDN) in which everything from the switching center to the subscriber line is digitized, the digital subscriber premises system has the configuration shown in Figure 2.

In the figure, an exchange 1 connects a digital circuit termination unit (hereinafter referred to as DSU) 3 via a subscriber line 2.
is combined with DSU3 is interface line 4,
5 to a home control device 6, and the home control device 6 is connected to non-telephone equipment 10 such as a digital telephone 9 and a digital facsimile through interface lines 7 and 8.

Here, the DSU 3, the home control device 6, the digital telephone 9, the non-telephone equipment 10, etc. are installed inside the home as home equipment.

In such a home system configuration, it has conventionally been possible to perform maintenance tests from the switching center 1 to the DSU 3 via the subscriber line 2, but it is not possible to go to the home and test the home equipment. Test equipment had not yet been developed. In other words, as the number of such in-home devices increases, the need for test equipment that can easily perform maintenance tests on in-home devices increases. Although it has been desired to realize a test device that can test both complex home devices and home control devices that connect and control those home devices, an effective test device for this purpose has not yet been realized. This is the current situation.

Furthermore, when performing maintenance tests using this test equipment at a subscriber's home, we will notify the central office of the test results in case the results are found to be defective and the subscriber's telephone cannot be used. However, in this case, rather than preparing a new digital telephone for communication, it is possible to incorporate the function of a digital telephone for communication into the test equipment itself. Although it is desired, such a trial production has, of course, not yet been realized.

[Problem that the invention seeks to solve]

In view of the above-mentioned circumstances of the prior art, the present invention enables testing of in-home equipment in a digital subscriber's home system by bringing a test device into the home, and furthermore, the test device has the functions of a digital telephone. The problem to be solved is to develop a testing device for such digital telephone equipment that is integrated and allows test results to be reported from the testing device to the central office.

Therefore, it is an object of the present invention to provide a testing device for digital telephone equipment as described above.

[Means and actions for solving problems]

The test device according to the present invention is a test device for digital telephone equipment for performing various tests on digital telephones and related devices, and includes a master terminal connected to the upper (station) side of the device under test to be tested. a side connection port, a slave side connection port that connects to the lower side (subscriber) side, a connection port for use of a telephone used when the test device is used as a telephone for communication with the station side, and the digital telephone. A telephone circuit constituting a telephone for testing or communication using the digital telephone and its related equipment as the equipment under test, a test result display means when testing the digital telephone and its related equipment as the equipment under test, and a channel connection. It consists of a control circuit, a dial tone generation circuit, a channel continuity test pattern generation/verification circuit, and a microprocessor, and the microprocessor connects a signal bus to the telephone circuit, the test result display means, and the channel connection control circuit. and is connected to each port via a signal bus and each interface circuit, and the channel connection control circuit is connected to the dial tone generation circuit and the channel continuity test pattern generation/control circuit.
is connected to the collation circuit, the telephone circuit, and each of the interface circuits by an information channel, and according to instructions input to the microprocessor, according to a sequence prepared in advance in the microprocessor. It is characterized in that it executes predetermined test operations on the equipment under test or operates as a telephone for communication with the central office.

〔Example〕

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

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

In the same figure, numeral 37 is a test device for digital telephone equipment as an embodiment of the present invention. 11 is a push-button dial switch, 12 is a display for displaying dial monitors, etc., 13 is a handset, 14 is a sounder, 15 is a telephone switch, 16 is a telephone input/output including a codec, a calling circuit, a communication circuit, etc. The circuit, 34 is an analog signal input terminal, and 35 is an analog signal output terminal, constitutes a telephone circuit provided in the test device.

Reference numeral 17 is an LED (light emitting diode) lamp that indicates the normality/abnormality of the test results of the signal channel, information channel, bit steel, etc., depending on the content of the test. Further, the LED lamp 17 displays the DC conditions and synchronization establishment test results for each connection port, which will be described later. 18 drives the LED lamp 17
The LED drive circuits 19 and 20 are master side connection ports, and are connected to the upper (station) side of the device under test, respectively. Specifically, if the home control device 6 is the device under test, each DSU3
Instead, the interface line 4 is connected to a high-speed information channel (64 kb/s) port for the home control device 6, and the interface line 5 is connected to a low-speed information channel (16 kb/s) port for the home control device 6. Ports can be simulated. If the digital telephone 9 is the device under test, connect the master side connection port 19 to the home control device 6.
Instead, it can be connected to the interface line 7, and the high-speed information channel (64 kb/s) port for the digital telephone 9 can be simulated in the same way as when testing the home control device 6. That is, the master side connection port 19 simulates a high speed information channel (64kb/s) port, the master side connection port 20 simulates a low speed information channel (16kb/s) port, and the connection ports 19, 2
0 can be tested using both at the same time (in-home control device test) or using only the connection port 19 (digital telephone test).

21 is a slave side connection port, which is connected to the lower (subscriber) side of the device under test. That is, when the home control device 6 is the device under test, if it is connected to the interface line 8 instead of the non-telephone device 10, the non-telephone device 10 can be imitated to the home control device 6.

22 is a connection port when using a telephone, and 36 is a dummy resistor. When using this test device 37 as a contact telephone, port 22 is connected to the interface line 4 instead of the home control device 6, and connected to the central office via the DSU 3. A dummy resistor 36 is connected so that the station power supplied from the exchange 1 via the subscriber line 2, DSU 3, and interface line 4 is equivalent to the case where the digital telephone 9 is connected. It is something to be consumed.

23 and 24 are interface circuits corresponding to the master side connection ports 19 and 20; 25 is an interface circuit corresponding to the slave side connection port 21;
26 is an interface circuit corresponding to the connection port 22 during telephone use, and 27 is a microprocessor.

In other words, the microprocessor 27
9 to 22 refer to the telephone input/output circuit 16 via each interface circuit 23 to 26 and the signal bus 28.
and the LED drive circuit 18 via a signal bus 28. 29 is the main test device 3
a changeover switch for instructing whether to use 7 as a contact telephone or a test device; 30;
31 is a channel connection control circuit, 32 is a dial tone generation circuit, and 33 is a channel continuity test pattern generation/verification circuit.

Channel connection control circuit 31 receives control signals from microprocessor 27 via signal bus 28 to connect interface circuits 23 to 2.
6. Controls the information path (information channel) between the telephone input/output circuit 16, the dial tone generation circuit 32, and the channel continuity test pattern generation/verification circuit 33.

The microprocessor 27 also contains the signal sequences and interface conditions in the DSU 3 that are originally required to test the call origination, call reception, call service, etc. of the digital telephone 9 in FIG. The signal sequences and interface conditions for each of the DSU 3 and the non-telephone equipment 10 that are originally required to test the home control device 6 are stored as control procedures.

FIG. 3 is a flowchart showing an example of the operating procedure of the test apparatus according to the present invention.

The equipment under test is connected to the test connection ports 19 to 21 of the apparatus as shown in the steps of the figure, and the power switch (not shown in FIG. 1) is turned on as shown in the steps. Next, set the changeover switch 29 to the test side, use the selection switch 30 to set the test mode and test number for each device under test (step and), and press the selection switch 3 to start the test.
When instructed from 0 (step), the microprocessor 27 selects the signal sequence and interface conditions corresponding to the relevant test, and performs predetermined processing in accordance with the selected conditions.

First, test the level 1 (electrophysical conditions) (Step), and check the test results for the direct condition (Loop Detection, which means that a loop has been detected) and the synchronization establishment (SYNC, which means that synchronization has been achieved with the other party). Displayed with LED lamp 17.

Then, according to the mode selected in the step,
If mode 1 is a test of a telephone, proceed to step, but if mode 2 to 5 is a test of a non-telephone device, proceed to step. When Bitsteel BS mode is selected in the step,
Bit steal test (normally 8 bits are allocated to audio data, but 7 bits are allocated to audio data)
The technique of converting the remaining bit into bits and reusing it for other purposes is called bit stealing). Otherwise, in the step, we test the information channel to see if it is possible to make a call on a high-speed information channel (64kb/s). Conduct a conversation test.

Next, in the step, tests are performed on add-ons, that is, three-way calls, and call waiting, that is, incoming call display during a call, and the next step is to proceed to the next step. If you proceed to the step,
, proceed to.

On the other hand, as shown in 2A corresponding to the step
LED lamp (one of 17 LED lamp groups,
) will light up. Similarly, the LED lamp lights up at 3A for the step. At step 4A, the test number is displayed on the display 12 (DISPLAY). Also, at step 7A for step 7, the loop detection LED lamp and the synchronization LED lamp are turned on.

In 11A corresponding to the step, B
The channel (information channel) OK LED lamp lights up, and at 12A corresponding to the step,
The BS OK LED lamp lights up. For 14A, D channel (signal channel) OK LED
The lamp lights up and at 18A, all other LED lamps except the power LED lamp and indicator 1
The display at 2 is cleared.

As is clear from the above, all test results are
It is displayed by lighting each LED lamp in the LED lamp group 17.

In this way, when all the signal sequences are completed normally, this fact is indicated by an LED lamp, and if the signal sequence is abnormal after the test starts, it is immediately indicated by the same LED lamp.

Hereinafter, the circuit operation of the test apparatus 37 according to the present invention will be explained in more detail in two cases: when it is used as a tester for each device, and when it is used as a telephone for communicating test results.

(a) When used as a test device for testing the digital telephone 9 shown in FIG. 2 The digital telephone 9 is separated from the home control device 6 and connected to the test device 37 according to the present invention as shown in FIG. 4. That is, the digital telephone 9 is connected to the master side connection port 19 of the test device 37 via the interface line 7. By connecting in this way, the test device 37 can simulate the DSU 3 or the home control device 6. First, set the changeover switch 29 to the test side (if it is the Vcc side)
Vcc side) and use the selection switch 30 to set test items such as digital telephone/outgoing call or digital telephone/incoming call using the test number.

In the case of a call test, when the digital telephone 9, which is the equipment under test, is taken off-hook, a level 1 test is first performed as shown in FIG. That is, a test for DC conditions and synchronization establishment is performed, and then a level 3 test and a level 4 test are performed in the following order. When a predetermined telephone number is dialed using the digital telephone 9, the sounder 14 of the test device 37 rings.
When the handset 13 of the test device 37 is turned off, the switch 15 is closed and a conversation is established. At this time, the digital telephone 9 is displayed on the display section 12.
The dialed number is displayed, and the channel connection control circuit 31 connects the telephone input/output circuit 16 and the interface circuit 23 of the master side connection port 19 to which the digital telephone 9 is connected. That is, the test telephone section of the test device 37 is connected to the digital telephone 9 via the channel connection control circuit 31, interface circuit 23, master side connection port 19, and interface line 7, and a call test is performed. be exposed. After confirming the call status, a disconnection/recovery test is performed by on-hook, and the test result is displayed on the LED lamp 17 (the meaning of the predetermined lamp in the lamp group is used. The same applies hereinafter), and the series of tests is completed.

In the case of an incoming call test, an incoming call is placed on the digital telephone 9, which is the device under test, by off-hooking the handset 13 of the test device 37 and dialing using the push-button dial switch 11. The test will be held.

In addition, in the case of either the outgoing or incoming call test, a dial tone (400 Hz audible signal) is sent from the dial tone generating circuit 32 to the receiver of the calling party from off-hook to the first dial.
Therefore, the test for digital telephone 9 is as if 2
This can be achieved using the same operating procedure as when making a call between two telephones.

Furthermore, by using the analog signal input terminal 34 and the analog signal output terminal 35, it is possible to test voice quality such as call volume, test PB (push button dial) signals, and the like.

(b) When used as a testing machine for testing the home control device 6 shown in FIG. 2 In this case, the home control device 6 is completely separated from other equipment, and the
Connect as shown. That is, the interface lines 4, 5, and 8 are connected to the connection ports 19, 20, and 21 of the test device 37, respectively. By connecting in this way, the test device 37 can simulate the DSU 3 and the non-telephone device 10.

The changeover switch 29 and selection switch 30 are set and the test is conducted in the same manner as in the case (a) above. At this time,
The simulation of the information channel of the non-telephone device 10 is realized by sending out a specific code pattern from the channel continuity test pattern generation/verification circuit 33.

This code pattern is the channel connection control circuit 3.
1, the connection port 19 (or 20), the interface line 4 (or 5), the home control device 6 which is the device under test, and the interface line 8 to the connection port 21. This code pattern is looped back by the interface circuit 25 and input to the channel continuity test pattern generation/verification circuit 33 via the reverse route. Here, the information channel is tested by comparing the transmission pattern and the input pattern for a certain period of time (for example, one second) and determining whether they match. The specific code pattern is for high speed information channel (64Kb/s) and low speed information channel (16Kb/s)
Test pattern and bit steel (8Kb/
Two types of patterns are used to test s).

(c) When the test device 37 according to the present invention is used as a telephone for communication with the central office In this case, the test device 37 according to the present invention
Connect to DSU3 as shown in FIG. That is, the connection port 22 of the test device 37 is connected to the DSU 3 via the interface line 4. First, when the selector switch 29 is set to the telephone side (or the ground side if it is the ground side), the microprocessor 2
Step 7 switches the control procedure so that the test device 37 operates as a contact telephone.

That is, the channel connection control circuit 31 is controlled via the signal bus 28, and the interface circuit 26 and the telephone input/output circuit 16 are connected. At this time, the microprocessor 27 operates to ignore inputs from the selection switch 30 and the interface circuits 23-25. Then, only the signals from the circuit portion corresponding to the digital telephone are made valid.

At this time, as described above, the station power supplied from the DSU 3 via the interface line 4 is consumed by the dummy resistor 36 provided in the activation detection section of the connection port 22.

(d) Testing device 3 according to the present invention as a testing device for testing indoor wiring including interface wires 4 and 5
In this case, the test device 37 according to the present invention is used.
Connect the DSU 3 as shown in FIG. 7 and test the indoor wiring including the interface wires 4 and 5.

That is, the connection port 22 of the test device 37 is connected to the DSU 3 via the interface line 4, and the connection port 21 is connected to the DSU 3 via the interface line 5. By performing a level 1 test (see FIG. 3) using the connection ports 21 and 22 and displaying the results on the LED lamp 17, it is possible to test indoor wiring from the DSU 3 to household equipment.

6 and 7 show the case where the test device 37 is connected to the DSU 3, but the in-home control device 6
When connecting to the connection port 21 and 2
It goes without saying that the test operation can be performed in the same manner by connecting 2 via the interface lines 7 and 8, respectively.

〔Effect of the invention〕

As explained above, the test device according to the present invention can perform functional operation tests and maintenance tests on digital telephones and in-home control devices, and can also be used as a telephone for contacting exchanges, and can also be used as a simple test device for indoor wiring. It has the advantage of being able to meet existing technical needs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
FIG. 2 is a block diagram showing an example of the configuration of a digital subscriber premises system, FIG. 3 is a flowchart showing an example of the operating procedure of the test device according to the present invention, and FIG. Connection diagram showing the connection mode when conducting the test, Part 5
The figure is a connection diagram showing the connection mode when testing an in-home control device, FIG. 6 is a connection diagram showing the connection mode when the test device according to the present invention is used as a contact telephone, and FIG. FIG. 2 is a connection diagram showing a connection mode when indoor wiring is tested using the test device according to the present invention. Explanation of symbols, 1... Exchange, 2... Subscriber line, 3...
DSU, 4, 5...Interface line, 6...Home control device, 7,8...Interface line, 9...Digital telephone, 10...Non-telephone equipment, 11...Push button dial switch, 12...Display device, 13...Transmission Handset, 14...Sounder, 15...Hook switch,
16...Telephone input/output circuit, 17...LED lamp, 1
8...LED drive circuit, 19, 20...Master side connection port, 21...Slave side connection port, 22...Telephone connection port, 23-26...Interface circuit, 27...Microprocessor, 28...Signal bus, 29 ... Selector switch, 30... Selection switch, 31... Channel connection control circuit, 32... Dial tone generation circuit, 33... Channel continuity test pattern generation/verification circuit, 34... Analog signal input terminal, 35... Analog signal output terminal, 36... Dummy resistor, 37...Test device according to the present invention.

Claims (1)

[Scope of Claims] 1. A test device for digital telephone equipment for conducting various tests on digital telephones and related devices, which includes a master connected to the upper (station) side of the equipment under test to be tested. a side connection port, a slave side connection port that connects to the lower side (subscriber) side, a connection port for use of a telephone used when the test device is used as a telephone for communication with the station side, and the digital telephone. A telephone circuit constituting a telephone for testing or communication using the digital telephone and its related equipment as the equipment under test, a test result display means when testing the digital telephone and its related equipment as the equipment under test, and a channel connection. It consists of a control circuit, a dial tone generation circuit, a channel continuity test pattern generation/verification circuit, and a microprocessor, and the microprocessor connects a signal bus to the telephone circuit, the test result display means, and the channel connection control circuit. and is connected to each port via a signal bus and each interface circuit, and the channel connection control circuit is connected to the dial tone generation circuit and the channel continuity test pattern generation/control circuit.
connected to the verification circuit, the telephone circuit, and each of the interface circuits by an information channel, and according to instructions inputted to the microprocessor, according to a sequence prepared in advance in the microprocessor. 1. A testing device for digital telephone equipment, characterized in that it executes a predetermined test operation on the equipment under test or operates as a telephone for communication with a central office. 2. In the test device for digital telephone equipment according to claim 1, the master side connection port is for a 64kb/s high-speed information channel and a 16kb/s high-speed information channel.
Test equipment for digital telephone equipment, characterized in that it consists of two connection ports for low-speed information channels of s. 3. A testing device for digital telephone equipment according to claim 1 or 2, wherein the telephone circuit is provided with input/output terminals for analog signals.