JPH0686344A - Digital exchange communication equipment - Google Patents

Abstract

PURPOSE:To provide an equipment capable of reducing cost by reducing the number of the kinds of the equipments by identifying the A-rule or the u-rule of an exchange device without depending on the control of a host system and automatically matching and setting the A-rule or the u-rule of the own codec by a digital communication terminal equipment itself. CONSTITUTION:The code of a soundless pattern written inside a microcomputer 10 is read by an A-rule/u-rule discrimination part 14 and the A-rule or the u-rule set at the codec 3 inside a central unit 1 is discriminated. Then, a control signal from an A-rule/u-rule setting control part 13 is inputted to the setting port of the codec 9 and the codec 9 switches and sets the A-rule or the u-rule which is a data conversion system in an internal part with the control signal. After the setting of the A-rule or the u-rule at the codec 9 is completed, the microcomputer 10 transmits a second power ON command to the CPU 5 of the central unit 1. The CPU 5 which received the second power ON command from a key telephone set 7 discriminates the kind of the key telephone set 7, discriminates set data and starts communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital switching communication device for identifying A-law or μ-law which is a signal conversion method in a codec of a switching device and automatically setting the A-law or μ-law of its own codec. Regarding

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing the configuration of a conventional digital button telephone device. In FIG. 3, this digital key telephone system is roughly constituted by a main unit 21 and a key telephone 27 which are connected to a public line or an office line such as a private line.

The main unit 21 includes a station line interface section 2
2 and the analog voice signal from the station line interface unit 22 is converted into a digital voice signal and sent to the PCM highway PH, or the digital voice signal from the PCM highway PH is converted into an analog voice signal and the station line interface unit 22 codec (CODE)
C) 23 and an A-law / μ-law setting unit 24 for setting the signal conversion method of the codec 23. further,
Local line interface unit 22, codec 23, A rule /
CPU for controlling μ-law setting unit 24 and 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, in the key telephone 27, the A-law / μ-law for setting the A-law or μ-law of the internal codec 9 is set.
It has a rule setting unit 30 and a call circuit 31 for processing sidetones and the like. In addition, the handset 3 is included in the communication circuit 31.
2. Hands-free microphone 33a and speaker 3
3b is connected, and a key telephone set 34 having the same configuration as the key telephone set 27 is connected to the main device 21.

Next, the operation of the above conventional configuration will be described. FIG. 4 is an operation start sequence diagram of the digital button telephone shown in FIG. In FIG. 4, the main device 2
1 starts up when the power is turned on (ON), and the key telephone 27
Power is supplied to. When power is supplied to the key telephone 27, the microcomputer 26 starts up. Then, from the microcomputer 26 to the CP of the main device 21
A first power-on command to the U25 indicating the energization of the microcomputer 26 and a second power-on command indicating the energization of other circuits.
The power-on command is sent continuously.

Upon receiving the first power-on command and the second power-on command, the CPU 25 of the main unit 21 determines the type of the key telephone set 27 and sends the set data. This set data is taken in by the microcomputer 26 of the key telephone 27 and the communication operation with the key telephone 27 is started. The operation start sequence of the other key telephones 34 is similar.

Next, the operation of making a call using 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 voice signal into a digital voice signal and sends it to the key telephone 27 through the PCM highway PH together with the control data from the CPU 25.

In the key telephone 27, the digital communication interface section 28 to which the digital voice signal and the control data from the main unit 21 are supplied discriminates the voice data and the control data and sends them to the microcomputer 26 and the codec 29, respectively. Audio data is codec 2
The digital voice signal is converted into an analog voice signal at 9, and the communication circuit 31, the handset 32 or the speaker 33 is converted.
The voice is output to the operator through b. Further, the transmission from the handset 32 or the microphone 33a is processed by following the route opposite to that of the reception and is transmitted from the station line.

In these operations, the codec 23,
There are two types of analog voice signal / digital voice signal conversion methods in 29. That is, depending on the country, there are A-law and μ-law. Therefore, the A-law or μ-law codec 2
The circuits of 3 and 29 are separately used and arranged individually, or A
A switchable codec IC for the law and for the μ law is used. This switching is performed through the A-law / μ-law setting unit 30 by a switching instruction from a switch or the like connected to the microcomputer 26.

[0011]

However, the above-mentioned conventional digital button telephone device requires complicated development, production and management in accordance with the standards for A-law and μ-law for each country. Therefore, there is a drawback that the number of models increases and the cost increases.

Further, setting of A-law or μ-law by software control from the main device 21 side can be considered, but the main device 21
However, there is a problem that software commands and sequences match with the higher-level model connected to, and the setting of A-law or μ-law cannot be easily achieved by software control from the main device 21 side.

The present invention solves such a conventional problem, and can automatically set the A-law or the μ-law of the switching device by the terminal device alone, reducing the number of models and reducing the cost. An object of the present invention is to provide an excellent digital switching communication device.

[0014]

In order to achieve the above object, a digital exchange communication device of the present invention comprises a switching device,
The A-law or μ-law, which is a signal conversion method in the codec of this exchange, is identified, and based on this identification, the A-law or μ-law of its own codec is automatically set.

Further, in this configuration, the digital communication terminal device reads the code in the silent pattern from the exchange device to identify the A-law or μ-law which is the signal conversion method in the codec of the exchange device. Rule identification means,
A codec that can set either A-law or μ-law and A-law /
A-law or μ in the exchange device judged by μ-law identification means
The A code / A rule setting control means for performing the setting control in accordance with the A rule or μ rule in the codec.

In these two configurations, the switching device is the main device connected to the host 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 switching device connected to the host device, and the digital communication terminal device is a digital switching device terminal device. In the above two configurations, the switching device is the main device connected to the ISDN line, and the digital communication terminal device is the ISDN terminal device.

[0017]

With such a configuration, the digital switching communication apparatus of the present invention identifies the A-law or μ-law of the switching apparatus without depending on the control of the host system, and the digital communication terminal device alone can use the A-law or μ-law of its own codec. The rules are set automatically. Therefore, the A-law or μ-law settings can be automatically changed according to the model 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 cost can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a digital exchange communication device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the embodiment. In FIG. 1, in this example, this digital key telephone system is roughly configured by a main unit 1 and a key telephone 7 which are connected to a public line or an office line such as a private line.

The main unit 1 has a station line interface section 2 to which a station line is connected, an analog voice signal from the station line interface section 2 is converted into a digital voice signal, and a PC is used.
Send to M highway PH or PCM highway PH
The codec (C which converts the digital audio signal from the
ODEC) 3, the A-law / μ-law setting unit 4 for setting the signal conversion method of the codec 3, the station line interface unit 2, the codec 3, the A-law / μ-law setting unit 4 and the button telephone 7. And a CPU 5 that operates.

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

Further, a microcomputer 10 for controlling the operation of the entire apparatus, a call circuit 11 for processing a call signal such as a side tone, and a silent pattern code supplied from the main unit 1 are read and connected. A rule for judging whether the main device 1 operates according to the A rule or μ rule /
The μ-law discrimination unit 14 is provided. A-law / μ-law determining unit 14 controls the setting of A-side or μ-law, which is a data conversion method inside the codec 9, or A-law /
a μ-law setting control unit 13, a handset 15 connected to the communication circuit 11, a hands-free microphone 16a,
The speaker 16b is connected. A button telephone 17 having the same configuration as the button 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 A-law or μ-law in the embodiment. In FIG. 2, the main device 1
Is turned on (ON) to start up the main unit 1, and then the key telephone 7 is supplied with power.

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

Next, the microcomputer 10 is energized,
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 to notify it. In the CPU 5 of the main device 1, the connection of this key telephone 7
After confirming the type, a silent pattern is sent from the main device 1 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 it 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 to discriminate the A-law or μ-law set in the codec 3 in the main unit 1.

Next, a control signal from the A-law / μ-law setting control section 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 μ-law in the codec 9 is completed, the microcomputer 10 instructs the CPU 5 of the main device 1 to
Send the second power-on command.

Upon receiving the second power-on command from the key telephone 7, the CPU 5 judges the type of the key telephone 7 connected by the first power-on command of the previous time and the second power-on command, and sets data. To start communication. The other key telephones 17 also start communication in the same setting sequence.

Next, the operation when a telephone call is made with the key telephone 7 will be described. First, the voice 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 voice signal is converted into a digital voice signal based on the law or μ law, and P is converted with the control data from the CPU 5.
It is sent to the key telephone 7 through the CM highway PH.

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

The voice data is converted from a digital voice signal into an analog voice signal by the codec 9, and this analog voice signal is voice 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 by tracing the route opposite to that of the reception and is transmitted from the station line.

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

Further, since the setting of the A-law or μ-law is automatically changed according to the model of the host system, consideration for each country to be used is unnecessary, and development, production and management are facilitated. 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 effect can be obtained even if the main unit 1 is a digital exchange and the key telephones 7 and 17 are digital exchange terminals or facsimile machines. can get. The same applies when the main unit 1 is connected to the ISDN line and the key telephones 7 and 17 are ISDN terminals.

[0035]

As is apparent from the above description, the digital switching communication device of the present invention identifies the A-law or μ-law of the switching device without depending on the control of the host system and identifies itself by the digital communication terminal device. The A-law or μ-law of the codec is automatically set. Therefore, the A-law or μ-law settings can be automatically changed according to the model 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, and the number of models is reduced, and the cost can be reduced.

[Brief description of drawings]

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

FIG. 2 is a sequence diagram of A-law or μ-law setting in the embodiment.

FIG. 3 is a block diagram showing the configuration of a conventional digital button telephone device.

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

[Explanation of symbols]

 1 Main Device 2 Station Line Interface Section 3 Codec 4 A Rule / μ Law Setting Section 5 CPU 7, 17 Button Telephone 8 Digital Communication Interface Section 9 Codec 10 Microcomputer 11 Communication Circuit 13 A Rule / μ Rule Setting Control Section 14 A Rule / Μ-law discrimination section

Claims (5)

[Claims] 1. A switching device and an A-law or μ-law which is a signal conversion method in a codec of this switching device are identified, and the A-law or μ-law of its own codec is automatically set based on this identification. A digital exchange communication device including a digital communication terminal device that performs 2. The digital communication terminal device according to claim 1, wherein the digital communication terminal device reads a code in a silent pattern from the exchange device to identify the A-law or μ-law which is a signal conversion method in the codec of the exchange device. / Μ-law identification means, a codec that can set one of A-law or μ-law, and A-law /
A digital switching communication device comprising: A-law / μ-law setting control means for performing setting control to match the A-law or μ-law in the exchange apparatus judged by the μ-law identifying means with the A-law or μ-law in the codec. 3. The digital exchange according to claim 1 or 2, wherein the exchange device is a main device connected to the host device, and the digital communication terminal device is a digital key telephone device. Communication device. 4. The digital exchange according to claim 1 or 2, wherein the exchange is a digital exchange connected to a host device, and the digital communication terminal device is a digital exchange terminal device. Communication device. 5. The switching device according to claim 1 or 2, wherein:
A digital switching communication device which is a main device connected to an SDN line, and in which the digital communication terminal device is an ISDN terminal device.