JP2970244B2 - Digital switching communication equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital exchange communication apparatus for identifying an A-law or .mu.-law as a signal conversion system in a codec of an exchange and automatically setting the A-law or .mu.-law of its own codec. About.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing a configuration of a conventional digital key telephone apparatus. In FIG. 3, the digital key telephone apparatus is schematically composed of a main unit 21 connected to a central office such as a public line or a dedicated line, and a key telephone 27.

[0003] The main unit 21 includes a central office interface unit 2.
2 and converts the analog audio signal from the central line interface unit 22 into a digital audio signal and sends it to the PCM highway PH, or converts the digital audio signal from the PCM highway PH into an analog audio signal and converts it into an analog audio signal. 22 (CODE
C) 23, and an A-law / μ-law setting unit 24 for setting the signal conversion method of the codec 23. further,
Office line interface unit 22, codec 23, A-law /
μ-law setting unit 24 and CPU for controlling key telephone 27
25 and a PCM highway PH.

The key telephone 27 is a PCM highway P.
Digital communication interface unit 28 connected to H
And a microcomputer 26 for controlling the operation of the key telephone 27 according to the control data from the main unit 21.
And a codec 29 are provided.

Further, this key telephone 27 has an A-law / μ-law for setting the A-law or μ-law of the internal codec 9.
It has a rule setting unit 30 and a call circuit 31 for performing processing such as side sounds. In addition, the handset 3
2. Hands-free microphone 33a, speaker 3
3b is connected, and a key telephone 34 having the same configuration as the key telephone 27 is connected to the main device 21.

Next, the operation of the configuration of the above conventional example will be described. FIG. 4 is an operation start sequence diagram of the digital key telephone shown in FIG. In FIG. 4, the main device 2
1 stands up when the power is turned on, and the key telephone 27
Is supplied with power. When power is supplied to the key telephone 27, the microcomputer 26 starts up. Then, the microcomputer 26 sends the CP
A first power-on command indicating that the microcomputer 26 is energized, and a second power-on command indicating that other circuits are energized.
The power-on command is sent continuously.

[0007] Upon receiving the first power-on command and the second power-on command, the CPU 25 of the main device 21 determines the type of the key telephone 27 and sends out the set data. The set data is fetched by the microcomputer 26 of the key telephone 27 and starts a communication operation with the key telephone 27. The same applies to the operation start sequence of the other key telephones 34.

Next, the operation when a call is made with the key telephone 27 will be described. First, the audio signal supplied from the office line is supplied to the codec 23 through the office line interface circuit 22. The codec 23 converts the analog audio signal into a digital audio signal, and sends the digital audio signal together with the control data from the CPU 25 to the key telephone 27 via the PCM highway PH.

In the key telephone 27, the digital communication interface 28 to which the digital audio signal and the control data from the main unit 21 are supplied discriminates the audio data and the control data and sends them to the microcomputer 26 and the codec 29, respectively. Audio data is codec 2
At 9, the digital audio signal is converted into an analog audio signal.
The voice is output to the operator through b. Further, the transmission from the handset 32 or the microphone 33a is processed along the reverse route to the reception and is transmitted from the central office.

In these operations, codec 23,
There are two types of analog / digital audio signal conversion systems in 29. That is, there are A-law and μ-law depending on the country, and therefore, codec 2 for A-law or μ-law is used.
Either use the circuits 3 and 29 separately and arrange them separately, or
A switchable codec IC for law and μ-law is used. This switching is performed through the A-law / μ-law setting unit 30 by a switching instruction using a switch or the like connected to the microcomputer 26.

[0011]

However, the above-mentioned conventional digital key telephone apparatus requires complicated development, production, and management in accordance with country-specific A-law and μ-law standards. Therefore, there is a disadvantage that the number of models increases and the cost increases.

It is conceivable to set the A-law or the μ-law by software control from the main device 21 side.
There is a problem in matching software commands and sequences with a higher-level device to which is connected, and there is a disadvantage that setting of A-law or μ-law by software control from the main device 21 cannot be easily achieved.

The present invention is to solve such a conventional problem, and the terminal device can be automatically set in accordance with the A-law or the μ-law of the switching device by itself, and the number of models is reduced to reduce the cost. An object of the present invention is to provide an excellent digital switching communication device.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object , the present invention provides a switching device and a device connected to the switching device.
A digital communication terminal and the exchange
Power supply means for supplying power to the digital communication terminal device;
The digital communication terminal device is housed in this digital
When supplied, a first power-on command indicating the type of the terminal device
First sending means for sending a command to the switching device;
It is housed in the exchange device and receives the output signal of the first transmitting means.
To send a silent pattern to the terminal device.
Turn sending means and the terminal device and the exchange
Read the code in the silent pattern from the device and replace it.
A or μ which is the signal conversion method in the codec
Identify the law and set it to match the A-law or μ-law in the codec.
Control is performed and a second power-on command is
Second sending means for outputting the first and second sending means,
According to the output signal of the stage, the type of the terminal device is determined and transmitted.
Communication means for starting communication .

[0015]

In these two configurations, the switching device is a main device connected to a higher-level device, and the digital communication terminal device is a digital key telephone device. Further, in the above two configurations, the switching device is a digital exchange connected to a higher-level device, and the digital communication terminal is constituted by a digital exchange terminal. In the above two configurations, the switching device is a main device connected to an ISDN line, and the digital communication terminal device is an ISDN terminal device.

[0017]

With such a configuration, the digital exchange communication apparatus of the present invention identifies the A-law or μ-law of the exchange apparatus independently of the control of the host system, and the digital communication terminal device alone uses the A-law or μ-law of its own codec. The rules are set automatically. For this reason, the setting of the A-law or the μ-law can be automatically changed according to the type of the host system, and it is not necessary to consider the country of use of the device. Therefore, development, production, and management are facilitated, the number of models is reduced, and costs can be reduced.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a digital exchange communication apparatus according to the present invention.

FIG. 1 is a block diagram showing the configuration of the embodiment. In FIG. 1, this digital key telephone apparatus is schematically composed of a main unit 1 and a key telephone 7 connected to a central office such as a public line or a dedicated line.

The main unit 1 includes a central office interface unit 2 to which a central office line is connected, and converts an analog audio signal from the central office interface unit 2 into a digital audio signal to convert the analog audio signal into a PC signal.
Send to M Highway PH or PCM Highway PH
A codec (C) for converting a digital audio signal from the
ODEC) 3, an A-law / μ-law setting unit 4 for setting a signal conversion method of the codec 3, a local line interface unit 2, a codec 3, an A-law / μ-law setting unit 4, and a key telephone 7. CPU 5 is provided.

The key telephone 7 separates the audio data and the control data supplied from the main unit 1, synthesizes an audio signal and a signal indicating the state of the key telephone 7, and sends the synthesized signal to the main unit 1. And a codec 9 for switching between A-law and μ-law, which are internal data conversion systems, by inputting a control signal from a setting port (not shown) for A-law or μ-law. .

Further, a microcomputer 10 for controlling the operation of the entire apparatus, a speech circuit 11 for processing speech signals such as side sounds, and a silent pattern code supplied from the main apparatus 1 are read and connected. A-law for determining whether main device 1 is operating according to A-law or μ-law /
A μ-law discrimination unit 14 is provided. Based on the result determined by the A-law / μ-law determining unit 14, the A-law / μ-law that controls the setting of the A-side or μ-law, which is the data conversion method inside the codec 9, is provided.
μ-law setting control unit 13, handset 15 connected to communication circuit 11, hands-free microphone 16 a,
The speaker 16b is connected. A key telephone 17 having the same configuration as the key telephone 7 is connected to the main device 1.

Next, the operation of the configuration of this embodiment will be described. FIG. 2 shows a setting sequence diagram of the A-law or the μ-law in the embodiment. In FIG. 2, the main device 1
Is turned on (ON), the main apparatus 1 starts up, and thereafter, power is supplied to the key telephone 7.

At the same time, under the control of the host device to which the main device 1 is connected, the main device 1 sets the A-law or the μ-law in the codec 3 through the CPU 5 and the A-law / μ-law setting unit 4. When power is supplied to the key telephone 7, the microcomputer 10 is energized and starts up.

Next, energization of the microcomputer 10
A first power-on command indicating the connection of the key telephone 7 and its type is sent to the CPU 5 of the main device 1 for notification. The CPU 5 of the main device 1 connects the key telephone 7 and
After confirming the type, the main apparatus 1 sends a silent pattern to the key telephone 7. The microcomputer 10 of the key telephone 7 reads the code in the silent pattern through the digital communication interface unit 8 and writes the code in the address.

The code of the silent pattern written in the microcomputer 10 is read by the A-law / μ-law discriminating section 14 and the A-law or μ-law set in the codec 3 in the main device 1 is discriminated.

Next, a control signal from the A-law / μ-law setting control unit 13 is input to a setting port (not shown) of the codec 9. With this control signal, the codec 9 switches and sets the A-law or μ-law, which is an internal data conversion method. After the setting of the A-law or the μ-law in the codec 9 is completed, the microcomputer 10 instructs the CPU 5 of the main device 1 to
Send a second power-on command.

The CPU 5 having received the second power-on command from the key telephone 7 determines the type of the connected key telephone 7 based on the previous first power-on command and the second power-on command, and sets the set data. To start communication. The other key telephones 17 start communication in the same setting sequence.

Next, a description will be given of the operation when a telephone call is made with the key telephone 7. First, the audio signal supplied from the office line is supplied to the codec 3 through the office line interface circuit 2. In this codec 3, the set A
The analog audio signal is converted into a digital audio signal based on the rule
It is transmitted to the key telephone 7 through the CM highway PH.

In the key telephone 7, a digital communication interface unit 8 to which a digital voice signal and control data from the main unit 1 are supplied discriminates voice data and control data and sends them to the microcomputer 10 and the codec 9, respectively.

The voice data is converted from a digital voice signal to an analog voice signal by the codec 9, and the analog voice signal is output to the operator through the communication circuit 11, the handset 15, or the speaker 16b. Further, the transmission from the handset 15 or the microphone 16a is processed along the reverse route to the reception and is transmitted from the central office.

As described above, the setting sequence of the A-law or the μ-law is added to the operation start sequence of the digital key telephone apparatus, and the key telephone apparatus 7 is automatically changed before the communication starts by itself without changing the upper system. A-law of main unit 1 / μ
It can be set according to the rules.

Further, since the setting of the A-law or the μ-law is automatically changed according to the model of the host system, consideration for each country to be used becomes unnecessary, and development, production and management become easy. Therefore, the number of models is reduced, and the cost can be reduced.

Although the key telephone 7 is connected to the main unit 1 in the upper embodiment, the same operation and effect can be obtained by using the main unit 1 as a digital exchange and the key telephones 7 and 17 as digital exchange terminals or facsimile machines. can get. The same applies when the main device 1 is connected to an ISDN line and the key telephones 7 and 17 are ISDN terminals.

[0035]

As is apparent from the above description, the digital exchange communication apparatus of the present invention comprises an exchange device and this exchange device.
A digital communication terminal device connected to the
Power supply to the digital communication terminal from the
Power supply means and the digital communication terminal device.
Indicates the type of the terminal device when the power is supplied.
A first power-on command transmitted to the switching device;
Sending means and the first sending means housed in the exchange device
Input the output signal of the stage and send a silent pattern to the terminal device.
A silent pattern sending means for sending
And the code in the silent pattern
Reading and signal conversion method in codec of switching equipment
A-law or μ-law is identified, and the A-law or
Perform setting control to match μ-law,
A second transmitting means for outputting a power-on command;
The output signals of the first and second transmitting means are used to control the terminal device.
Communication means for determining the type and starting communication
Therefore, the A-law or μ-law of the switching device is identified without depending on the control of the host system, and the A-law or μ-law of its own codec is automatically set by the digital communication terminal unit alone. For this reason, the setting of the A-law or the μ-law can be automatically changed according to the type of the host system, and it is not necessary to consider the country of use of the device. Therefore, there is an effect that development, production, and management are facilitated, the number of models is reduced, and costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital exchange communication apparatus according to an embodiment of the present invention.

FIG. 2 is a sequence diagram for setting an A-law or a μ-law in an embodiment.

FIG. 3 is a block diagram showing the configuration of a conventional digital key telephone apparatus.

FIG. 4 is an operation start sequence diagram of a conventional digital key telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main apparatus 2 Local line interface unit 3 Codec 4 A-law / μ-law setting unit 5 CPU 7, 17-button telephone 8 Digital communication interface unit 9 Codec 10 Microcomputer 11 Communication circuit 13 A-law / μ-law setting control unit 14 A-law / Μ-law discriminator

Claims (4)

(57) [Claims] An exchange, a digital communication terminal connected to the exchange, and power supply means for supplying power to the digital communication terminal from the exchange;
First transmission means for transmitting to the exchange device a first power-on command indicating the type of the digital communication terminal device when the power is supplied, the first transmission means being accommodated in the exchange device; A silent pattern transmitting means for receiving an output signal of the first transmitting means and transmitting a silent pattern to the digital communication terminal device ;
It is stored in a digital communication terminal device , reads a code in a silent pattern from the switching device, identifies an A-law or a μ-law as a signal conversion method in a codec of the switching device, and matches the A-law or the μ-law with the codec. A second setting indicating the type of the digital communication terminal device by performing setting control .
A second transmitting means for outputting a power-on command to the switching device, and an output signal of the first and second transmitting means,
Communication means for determining the type of the digital communication terminal device and starting communication. 2. The digital exchange communication device according to claim 1, wherein the exchange device is a main device connected to a higher-level device, and the digital communication terminal device comprises a digital key telephone device. . 3. The digital exchange communication device according to claim 1, wherein the exchange device is a digital exchange connected to a host device, and the digital communication terminal device is constituted by a digital exchange terminal device. . 4. The switching device according to claim 1, wherein the switching device is an ISDN.
A digital switching communication device which is a main device connected to a line and wherein the digital communication terminal device is constituted by an ISDN terminal device.