JPH04100467A - Test signal sound sending system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] A test signal that sends a test signal tone to a subscriber telephone in order to confirm the normality of the connection when the subscriber telephone is accommodated in a time division communication path device of a digital exchange. Regarding the sound transmission method, the purpose of this process is to make it possible to confirm the connection normality of newly connected subscriber telephones without impairing the economic efficiency of digital exchanges and without imposing operational burdens on testers. In a digital switching system equipped with a time division channel device having a transmission signal memory for storing control signals to be transmitted from the device to accommodated subscribers, a digitally encoded test signal tone is stored in a predetermined storage area of the transmission signal memory. When the data is stored and a predetermined number is selected from the subscriber telephone to be tested, a communication path connecting the subscriber telephone and the transmission signal memory is set in the time division communication path device, and the transmission is performed. The test signal tone data stored in the signal memory is extracted and sent back to the subscriber telephone via the time division channel device.

[Industrial application field]

The present invention relates to a test signal tone transmission method for transmitting a test signal tone to a subscriber telephone in order to confirm the normality of the connection when the subscriber telephone is accommodated in a time division communication path device of a digital exchange.

[Conventional technology]

FIG. 5 is a diagram showing an example of a conventional test signal sound transmission system, and FIG. 6 is a diagram showing another example of a conventional test signal sound transmission system.

In FIGS. 5 and 6, the digital exchange includes a subscriber circuit (LC) I that accommodates a subscriber telephone 4 in a time-division channel (NW) 2, and a subscriber circuit (LC) I that accommodates the subscriber telephone 4 in a time-division channel (NW) 2. A processor (CP) is connected between the subscriber telephones 4
U) A time division communication path device t(NW) 2 that sets a communication path based on instructions from the subscriber telephone 4; Analyzes the required communication path and uses a time division communication path device (NW)
The CPU 3 has a processing unit (CPU) 3 that is set to 2.

In FIG. 5, when a subscriber telephone 4 is connected to a subscriber circuit (LC) 11 consisting of After connecting the test signal sound source 5 that generates the tone T (analog format) to another subscriber circuit (LC) 1-2, a call is made from the subscriber telephone 4 to be tested, and the test signal sound source 5 is connected. dial the telephone number DN assigned to the subscriber circuit (LC) 1-2.

The processing unit (CPU) 3 inputs the calling signal and telephone number DN sent from the subscriber telephone 4 to the subscriber circuit (LC).
1-1, multiplex circuit (M) in time division channel equipment (NW) 2
PX) 21, speech path memory (SPM) 23, separation circuit (
DMPX) 22, received signal memory (R3M) 26, receives and analyzes the received signal, and sends the signal to the communication path memory (SPM) 23 via the control memory (CM) 24, to the subscriber circuit (LC) 11.
and 1-2.

As described above, the test signal sound T sent out from the test signal sound source 5 is transmitted to the code/decoder circuit (CO) in the subscriber circuit (LC) 1-2.
Each sample value is encoded into an 8-bit PCM code, converted to a digitized test signal tone T, and then sent to a multiplex circuit (MPM).
The signal is transmitted to the subscriber circuit (LC) 1-1 via the communication path and separation circuit (DMPX) 22 set in the communication path memory (SPM) 23, and
) 1-1, the code/decoder circuit (CODEC) 11-1 converts the test signal tone T into an analog test signal tone T and sends it back to the subscriber telephone 4.

The tester confirms that the subscriber telephone 4 is normally connected by listening to the test signal tone T through the subscriber telephone 4.

However, in the test signal sound transmission system shown in FIG.
Do you need to connect to it?

Next, in the digital exchange shown in FIG.
21, there is a test signal sound generation bag in one of the subscriber circuit (LC) 1 accommodation terminals! (TG) 6 is accommodated, and a telephone number DN is assigned.

The test signal sound generator (TG) 6 includes a test signal sound source 61 similar to the test signal sound source 5 (FIG. 5), and a subscriber circuit (LC).
) A code/decoder circuit (CODEC) 62 similar to the code/decoder circuit (CODEC) 11 provided in 62 converts it into a digitized test signal tone T, and sends it to a multiplex circuit (MPX) 21.

In Fig. 6, when the subscriber telephone 4 is connected to the subscriber circuit (LC) 1-1, the tester can check whether the connection is normal or not. When you call and dial the telephone number DN, the processing unit (C
The calling signal and telephone number DN 6 sent from the subscriber telephone set 4 are received and analyzed via the same route as described above, and sent to the communication path memory (SP) via the control memory (CM) 24.
M) 23, a communication path connecting between the subscriber circuit (LC) l-1 and the test signal tone generator (TG) 6 is set.

As described above, the digitized test signal tone T sent out from the test signal tone generator (TG) 6 is transmitted to the subscriber circuit (LC) 1-1 through the same route as described above, and
The code/decoder circuit (CODEC) 11-1 in the LC) 1-1 converts the test signal tone T into an analog test signal tone T, and sends it back to the subscriber telephone 4.

The tester confirms that the subscriber telephone 4 is normally connected by listening to the test signal tone T through the subscriber telephone 4.

However, in the test signal tone transmission method shown in FIG. 6, it is necessary to install a test signal tone generator (TG) 6 in the digital exchange in order to confirm the normality of the connection of the subscriber telephone 4. .

[Invention or problem to be solved]

As is clear from the above explanation, in the test signal sound transmission method illustrated in FIG. Is it necessary to connect to the controller circuit (LC) 1-2?
In addition, in the test signal tone transmission method illustrated in FIG. 6, which is complicated in operation, a test signal tone generator (TG) 6 is installed in the digital exchange in advance in order to confirm the normality of the connection of the subscriber telephone 4. There was a problem that the economic efficiency of the digital switching equipment was impaired.

An object of the present invention is to make it possible to confirm the connection normality of a newly connected subscriber's telephone without impairing the economic efficiency of the digital exchange and without imposing operational burden on the tester.

[Means to solve the problem]

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

In FIG. 1, 2 is a time-division channel device, 3 is a processing device, 4 is a subscriber telephone newly connected to the time-division channel device 2 and subjected to a connection normality confirmation test, and 25 is a processing device 3
This is a transmission signal memory that stores control signals to be transmitted from the network to the accommodated subscribers.

S is digitally encoded test signal tone data stored in a predetermined storage area of the transmission signal memory 25 according to the present invention.

[Effect]

When a predetermined number is selected from the subscriber telephone 4 to be tested, the processing device 3 sets a communication path connecting the subscriber telephone 4 and the transmission signal memory 25 in the time division communication path device 2. Then, the digitally encoded test signal tone data S6 stored in the transmission signal memory 25 is extracted and sent back to the subscriber telephone 4 via the time division channel device 2.

Therefore, there is no need for the tester to prepare a test signal tone source in order to confirm the connection normality of a newly connected subscriber's telephone, and there is no need for the tester to prepare a test signal tone generator in the digital exchange. There is no need to keep the digital switch in place, the complexity of operating the digital switch is eliminated, and the economic efficiency of the digital switch is also improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a test signal tone transmission system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of the transmission signal memory in FIG. 2, and FIG. 4 is a diagram showing a sample of the test signal tone. FIG.

In FIG. 2, as in FIG. 1, digitally encoded test signal tone data S, Stored.

The transmission signal memo'J (SSM) 25 is a processing unit (CP).
U) 3 is a multiplex circuit (MPX) 21, a communication path memory (S
It stores various control signals to be transmitted to each subscriber circuit (LC) 1 connected to the time division channel (NW) 2 via the PM) 23 and separation circuit (DMPX) 22.

The transmission signal memory (SSM) 25 is, as shown in FIG.
It has a total storage capacity of 4 kilobytes (strictly speaking, 4096 bytes) and is divided into 128 channels CHO to CH127 each having 32 bytes.

Control signals stored in each channel CHO to CH127 are transmitted to corresponding accommodation terminals of a multiplex circuit (MPX) 21 by a transmission signal memory (SSM) 25.

On the other hand, the test signal sound source 5 (Fig. 5) or the test signal sound source 6
1 (Fig. 6) has a frequency of 1 kilohertz as shown in Fig. 4, the code/decoder circuit (CODEC) l 1 in the subscriber circuit (LC) 1, Alternatively, the code/decoder circuit (CO) in the test signal tone generator (TG) 6
When sampling is performed at a period of 8 kilohertz as in DEC) 62 (FIG. 6), eight sets of sampled data S0 to S7 are obtained for each period of the test signal tone T.

By PCM encoding each sampled data S0 to S7, test signal sound data S4 each consisting of 8 bits is obtained.
° to S dT is generated.

In this embodiment, the test signal sound data S realized by a cycle of 8 bytes is stored in a specific storage area (channel CHO in FIG. 3) of the transmission signal memory (SSM) 25.
,. Four cycles of S dT to S dT are stored in advance as a digitized test signal tone T from the processing unit (CPU) 3 , and are stored in the transmission signal memory (SSM) of the multiplex circuit (MPX) 21 .
) A test telephone number DNc, , is assigned in advance to the accommodation terminal corresponding to channel CHO of 25.

In such a state, when the subscriber telephone 4 is connected to the subscriber circuit (LC) 1-1, the tester makes a call from the subscriber telephone 4 to be tested in order to confirm the normality of the connection. , when the test telephone number DNcH0 is dialed, the processing unit (CPU) 3 receives and analyzes the calling signal and the telephone number DN sent from the subscriber telephone 4 through the same route as described above, and stores it in the control memory. (CM) 24 to the channel memory (SPM) 23 between the accommodation terminals of the multiplex circuit (MPX) 21 corresponding to the channel CHO of the subscriber circuit (LC) 1-1 and the transmission signal memory (SSM) 25. Set the communication path to connect.

The transmission signal memory (SSM) 25 stores four sets of test signal tone data S, which are stored in channel CHO. ~S6□
are sequentially extracted and transmitted to the subscriber circuit (LC) 1-1 via a multiplex circuit (MPX) 21, a channel memory (SPM) 23, and a separation circuit (DMPX) 22.

The subscriber circuit (LC) 1-1 receives the test signal sound data S, which is repeatedly transmitted as described above. The code/decoder circuit (CODEC) 11-1 converts S dT into an analog test signal tone T, which is sent back to the subscriber telephone 4.

The tester confirms that the subscriber telephone 4 is properly connected by listening to the test signal tone T through the subscriber telephone 4.

As is clear from the above description, according to this embodiment, the transmission signal memory (SSM) in the time division channel device (NW) 2
25 channels CHO (32 bytes) - test signal tone data S, consisting of bytes to period. The test signal sound data S from the channel CIO of the transmission signal memory (SSM) 25 is stored in advance for four cycles of S dT and sent to the subscriber telephone 4 for confirming the normality of the connection. By transmitting S d'l, there is no need for the tester to prepare a test signal sound source 5, and there is also no need to install a test signal sound generator (TG) 6 in the digital exchange.

It should be noted that FIGS. 2 to 4 are only one embodiment of the present invention, and for example, the storage capacity of the transmission signal memory (SSM) 25 and the storage area for the test signal sound data S do to S 47, the test signal sound The frequency of T, the sampling period, etc. are not limited to those shown in the drawings, and many other modifications may be considered, and the effects of the present invention will not change in any case. It goes without saying that the configurations of the digital exchange and time-division channel device 2 to which the present invention is applied are not limited to those shown in the drawings.

〔Effect of the invention〕

As described above, according to the present invention, in the digital exchange, there is no need for the tester to prepare a test signal sound source in order to confirm the connection normality of a newly connected subscriber telephone, and there is no need for the tester to prepare a test signal sound source. It is no longer necessary to install a test signal tone generating device in the digital exchange, the complexity of operating the digital exchange is eliminated, and the economical efficiency of the digital exchange is also improved.

In the figure, l is a subscriber circuit (LC), 2 is a time division channel device (NW), 3 is a processing unit (CPU), 4 is a subscriber telephone, 5 and 61 are test signal sound sources, and 6 is a test signal sound source. The generator (TG), 11 and 62 are code/decoder circuits (CO
DEC), 21 is a multiplex circuit (MPX), 22 is a separation circuit (DMPX), 23 is a speech path memory (SPM), 24
25 is a control memory (CM), and 25 is a transmission signal memory (SS

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a test signal sound transmission system according to an embodiment of the present invention, and FIG.
4 is a diagram illustrating an example of a sampling situation of a test signal tone, FIG. 5 is a diagram illustrating an example of a conventional test signal tone transmission method, and FIG. 6 is a diagram illustrating an example of a conventional test signal tone transmission method. FIG. 7 is a diagram illustrating another example of a certain test signal sound transmission method. Kiroaki’s 71! , Buried Figure 1

Claims (1)

[Scope of Claims] A digital exchange equipped with a time-division channel device (2) having a transmission signal memory (25) for storing control signals to be transmitted from a processing device (3) to accommodated subscribers, comprising the following steps: (25) The digitally encoded test signal sound data (S_d
), and when a predetermined number is selected from the subscriber telephone (4) to be tested, a communication path connecting the subscriber telephone (4) and the transmission signal memory (25) is stored. , set in the time-division channel device (2), extract the test signal tone data (S_d) stored in the transmission signal memory (25), and transmit the test signal tone data (S_d) via the time-division channel device (2). The test signal tone transmission method is characterized in that the test signal tone is sent back to the subscriber telephone (4).