JP2003018325A - Vodesl device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a VoDSL device for improving efficiency in the band use of a digital subscriber's line(DSL). SOLUTION: A caller side analog telephone set 2 directly connected to a VoDSL device 1 is composed of a translator 10 for receiving an identification signal sent from the caller side analog telephone set 2 in order to designate a call receiving side analog telephone set 2B directly connected to the VoDSL device 1 and specifying the call receiving side analog telephone set 2B on the basis of the received identification signal and a switch means 3 for controlling the connection of the caller side analog telephone set 2 and the call receiving side analog telephone set 2B on the basis of the signal which is outputted from the translator 10 for specifying the caller side analog telephone set 2. The switch means 3 is provided between the analog telephone set 2 and a signal converting part 4.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to VoDSL (Voic
The present invention relates to an e over DSL) device, and more particularly, to a VoDSL device that makes efficient use of a band of a digital subscriber line (DSL).

[0002]

2. Description of the Related Art One digital subscriber line (hereinafter referred to as DSL) is used by digitizing analog voice from an analog telephone, time-division multiplexing the digitized voice data, and connecting to DSL. The technology of using multiple telephone lines at the same time is generally called VoDSL (Voice over
It is called DSL) and is being standardized worldwide. Japanese Patent Laid-Open No. 2000-1655 discloses a technique having a similar function.
The ADSL system described in Japanese Patent No. 17 is known.

In the conventional VoDSL device, even when analog telephones connected to the VoDSL device are used for communication, the voice is digitized, the voice data is once transmitted to the station side device via the DSL, and then the voice data is transmitted. It is typical to call back to another analog telephone connected to the device. At this time, regardless of the same home device,
Since the data is once transmitted to the station device, there is a problem that the DSL band is consumed.

The VoDSL device is connected to a plurality of analog telephones, and in some cases, an information processing device such as a computer, and digitized voice data and data from the computer are transmitted by sharing a single DSL band. Therefore, if the bandwidth is consumed for a call in the same home, there is a problem that the bandwidth available to other telephones or computers becomes narrow.

[0005]

The object of the invention is to remedy the above-mentioned drawbacks of the prior art, in particular to the same VoDSL.
In the case of a call between analog telephones connected in the device, it is possible to make an extension telephone by making a call in the VoDSL device without outputting digital data to the DSL.
As a result, a novel VoDSL device that enables efficient use of the DSL band is provided.

[0006]

In order to achieve the above-mentioned object, the present invention basically adopts the technical constitution as described below.

That is, the first aspect of the VoDSL device according to the present invention is an A / D converter for converting a voice signal from an analog telephone into a digital signal and a D / A conversion for converting a received ATM cell into an analog signal. And a digital signal output from the A / D converters of the plurality of signal conversion units are converted into ATM cells, multiplexed and concentrated, and received from the digital subscriber line.
A concentrator that distributes M cells to a predetermined analog telephone and an ATM cell multiplexed by the concentrator are modulated and sent to the digital subscriber line, and a signal received from the digital subscriber line is demodulated. In the VoDSL device including the DSL modem for inputting to the concentrator, the calling analog telephone directly connected to the VoDSL device specifies the called analog telephone directly connected to the VoDSL device. A receiver for receiving the identification signal sent from the analog telephone of the calling side and identifying the analog telephone of the receiving side based on the received identification signal, and the analog telephone of the receiving side output from the translator. Based on the signal for calling, the connection control between the calling analog telephone and the receiving analog telephone is performed. Consists of a switching means for said switching means is characterized in that provided between the analog telephone set and the signal conversion unit,
Further, a second aspect is a signal conversion unit comprising an A / D converter for converting a voice signal from an analog telephone into a digital signal and a D / A converter for converting a received ATM cell into an analog signal, A concentrator for distributing the digital signals output from the A / D converters of the plurality of signal converters into ATM cells, multiplexing and concentrating the ATM cells, and distributing the ATM cells received from the digital subscriber lines to predetermined analog telephones. And a DSL modem that modulates the ATM cells multiplexed by the concentrator and sends them to the digital subscriber line, demodulates the signal received from the digital subscriber line, and inputs the demodulated signal to the concentrator. In the VoDSL device, an analog telephone on the calling side directly connected to the VoDSL device is connected to an analog telephone on the called side directly connected to the VoDSL device. A translator for receiving an identification signal sent from the calling analog telephone to specify a telephone and specifying the called analog telephone based on the received identification signal; and an incoming call output from the translator. A switch means for controlling connection between the calling-side analog telephone and the receiving-side analog telephone based on a signal for specifying the side-side analog telephone, and the switch means includes the signal converting section and the concentrator. And an A / D converter for converting a voice signal from an analog telephone into a digital signal and a received ATM cell for converting into an analog signal. And a digital signal output from the A / D converters of the plurality of signal converting units, and a signal converting unit including a D / A converter. Thereby concentrating and multiplexing Le of, AT received from the digital subscriber line
A concentrator that distributes M cells to a predetermined analog telephone and an ATM cell multiplexed by the concentrator are modulated and sent to the digital subscriber line, and a signal received from the digital subscriber line is demodulated. In the VoDSL device including the DSL modem for inputting to the concentrator, the calling analog telephone directly connected to the VoDSL device specifies the called analog telephone directly connected to the VoDSL device. A receiver for receiving the identification signal sent from the analog telephone of the calling side and identifying the analog telephone of the receiving side based on the received identification signal, and the analog telephone of the receiving side output from the translator. Based on the signal for calling, the connection control between the calling analog telephone and the receiving analog telephone is performed. The switch means is provided in the concentrator, and in a fourth aspect, the switch means includes the analog telephone of the calling side and the called party. When connecting to the analog telephone of the calling side, the ringer circuit provided in the VoDSL device sends a call signal to the analog telephone of the receiving side via the switch means, and the tone generator provided in the VoDSL device. The circuit sends a ringback tone to the calling analog telephone via the switch means.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A VoDSL device of the present invention is a VoDSL device that digitizes voices of a plurality of analog telephones, time-division multiplexes them, and connects them to a DSL.
When making a call between a plurality of analog telephones connected to the oDSL device, the DSL is connected by connecting as an extension telephone without sending voice data to the DSL.
It is characterized by making efficient use of the band.

Referring to FIG. 1, a VoDSL device 1 of the present invention is shown.
Are connected to analog telephones 2, 2A, and 2B, and a translator 10 that interprets a telephone number input from each analog telephone and each analog telephone are connected.
It incorporates a switch 3 for disconnecting. Further, each analog telephone has a built-in ringer 11 for generating a ringing tone and a tone generator 12 for generating a tone signal.

For example, when the analog telephone 2 makes a call to the analog telephone 2B, an identification signal indicating that the telephone is an extension telephone and a number designating a destination telephone to be received are input from the analog telephone 2. Translator 10
When the identification signal indicating that the telephone is an extension telephone is detected from the analog telephone 2, it recognizes that the call is for an extension telephone, interprets the number that is subsequently input, and specifies the analog telephone 2B that should receive the call. Then, the switch 3 is instructed to perform the circuit connecting operation. By this instruction, switch 3
Connects the circuit between the ringer 11 and the analog telephone 2B on the receiving side, and sends a ringing tone to the analog telephone 2B on the receiving side. At the same time, the tone generator 12 and the calling analog telephone 2 are connected to each other, and the calling analog telephone 2 is connected.
Send ringback tone to. VoDSL device 1
When the off-hook of the analog telephone 2B on the receiving side is detected, the ringer 11 and the tone generator 12 are disconnected from the switch 3, the analog telephone 2 on the calling side and the telephone 2B on the receiving side are connected to establish a call path for both. To do.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a VoDSL device according to the present invention will be described in detail below with reference to the drawings.

(First Specific Example) FIG. 1 is a block diagram showing a first specific example of the VODSL apparatus according to the present invention. In FIG. 1, a voice signal from an analog telephone 2 is converted into a digital signal. A / D converter for converting into a signal and a signal converter 4 including a D / A converter for converting a received ATM cell into an analog signal, and A of the plurality of signal converters 4 to 4B.
Each digital signal output from the / D converter
Concentrator 5 for converting the ATM cells to multiplex and concentrating the ATM cells, and distributing the ATM cells received from the digital subscriber line 7 to a predetermined analog telephone, and the ATM cells multiplexed by the concentrator 5 to modulate the digital cells. In the VoDSL device 1 including the DSL modem 6 for sending to the subscriber line 7, demodulating the signal received from the digital subscriber line 7 and inputting it to the concentrator 5,
Calling side analog telephone 2 directly connected to the SL device 1
Receives an identification signal sent from the calling analog telephone 2 in order to specify the receiving analog telephone 2B directly connected to the VoDSL device 1, and based on the received identification signal, the receiving analog A translator 10 for identifying the telephone 2B, and the translator 10
The switch means 3 comprises a switch means 3 for controlling connection between the caller side analog telephone 2 and the callee side analog telephone 2B based on a signal for identifying the callee side analog telephone 2B. Shows a VoDSL device which is provided between the analog telephone 2 and the signal conversion unit 4.

Further, when the switch means 3 connects the calling side analog telephone 2 and the called side analog telephone 2B, the ringer circuit 11 provided in the VoDSL device 1 causes the switch means 3 to operate. Via the call signal to the analog telephone 2B on the called side,
Tone generator circuit 1 provided in the VoDSL device 1
2, a VoDSL device is shown, characterized in that it sends a ringback tone to the calling analog telephone 2 via the switch means 3.

The first specific example will be described in detail below with reference to FIG.

In FIG. 1, reference numeral 1 is the VoDSL of the present invention.
It is a device. The VoDSL device 1 has an analog telephone 2,
The analog telephones 2A and 2B are connected to each other, and each analog telephone shares the bandwidth of one DSL 7 and simultaneously communicates with the network station apparatus 8 side. In this example, for simplification of description, three analog telephones are connected.

Signal converters 4, 4A, 4B are provided respectively corresponding to the analog telephones 2, 2A, 2B, and the respective A / Ds provided in the signal converters 4, 4A, 4B.
The converter converts the analog voice input from the analog telephones 2, 2A, 2B into a digital signal. The signal conversion units 4, 4A, and 4B also include a D / A converter that converts a digital signal input from the DSL 7 side into analog voice and outputs the analog voice, and has a bidirectional analog / digital conversion function. ing.

In the concentrator 5, the signal converters 4, 4A, 4
The digital signal generated by each A / D converter of B is AT
It has a function of converting to M cells and multiplexing ATM cells of a plurality of channels to condense. With the DSL modem 6,
The ATM cell output from the concentrator 5 is connected to the DSL 7 and transmitted to communicate with the opposite device.

Voice data converted into ATM cells is DSL7.
Is transmitted to the head-end DSL modem 9 in the station building 8.
To the public network.

An information processing device 13 is connected to the VoDSL device 1 so that the voice data and the DSL 7 band can be shared to perform data communication via the public network.

Further, the VoDSL device 1 of the present invention has a built-in translator 10 for interpreting a destination number and an identification signal indicating an extension which are input from an analog telephone. Further, a ringer 11 for sending out a ringing tone and a tone generator 12 for sending out various tone signals are built in to the analog telephone on the called side. The analog telephones, the ringer 11, the tone generator 12, and the signal conversion units 4, 4A, and 4B are connected to the switch 3, and the switch 3 has a function of connecting or disconnecting circuits of respective devices.

Next, the operation of the VoDSL device 1 of the present invention will be described.

In the normal VoDSL device 1, the voice signal input from each analog telephone is digitized, the ATM cell voice data is multiplexed, and the voice data is transmitted and received via the DSL 7. Switch 3 in this state
Is an A / D converter of the analog telephone 2 and the signal converter 4, and an A / D of the analog telephone 2A and the signal converter 4A.
Converter, analog telephone 2B and signal converter 4B
The voice input from each analog telephone is connected to each A / D converter of
It is sent to the D converter and digitally encoded.

In the VoDSL device constructed as described above, the same V
A case where a call is made from the analog telephone 2 connected to the oDSL device 1 and the call is received at the analog telephone 2B will be described below as an example.

The user inputs from the analog telephone 2 a signal indicating that the telephone is an extension telephone and a number for designating the destination telephone. Here, "#" is input as a signal indicating that the telephone is an extension telephone, and "3" is input as a number for designating the analog telephone 2B as the other party. When the user inputs “# 3” from the analog telephone 2, the translator 10 interprets it as a call for an extension telephone when the “#” is received from the analog telephone 2, and further inputs “3”. Is received, the analog telephone set 2 is interpreted as an incoming call to the analog telephone set 2B, and the following extension telephone control is performed.

That is, in the switch 3, the analog telephone 2B
The circuit between the signal conversion unit 4B and the signal conversion unit 4B is disconnected, and instead, a line is set between the analog telephone 2B and the ringer 11. As a result, the ring tone is emitted from the analog telephone 2B. At the same time, the switch 3 disconnects the circuit between the analog telephone 2 and the signal conversion unit 4, and instead connects the circuit between the analog telephone 2 and the tone generator 12. As a result, a ringback tone is sent to the analog telephone 2.

In this state, when the analog telephone 2B goes off-hook, the switch 3 disconnects the circuits of the ringer 11 and the tone generator 12 and, at the same time, the analog telephone 2B.
And a circuit between the analog telephone 2B. As a result, the call path between the analog telephone 2 and the analog telephone 2B is set, and the call is started.

In the above description, the switch 3 is arranged so as to be provided between the analog telephone and the signal converting section. However, as shown in FIG. 3, the switch 3 is arranged between the signal converting section and the concentrator. You may comprise so that it may be provided.

(Second Specific Example) FIG. 2 is a block diagram showing a second specific example of the present invention. In this specific example, FIG.
The switch 3 is omitted and the switch function is provided in the concentrator 5.

In this case, in the case of an extension telephone from the analog telephone 2 to the analog telephone 2B, A of the signal conversion section 4 is used.
The audio data digitized by the / D converter,
The signal is converted back into the ATM concentrator 5 and the D /
After being sent to the A converter for analogization, it is sent to the analog telephone 2B. In this specific example, the ringer 11 and the tone generator 12 are connected to the concentrator 5 as a digitized sound source. The extension telephone connection control method is the same as that of the first specific example, except that the call path between the analog telephones, the ringer 11, and the tone generator 1 are used.
The connection control with 2 is performed in the concentrator 5.

Therefore, in the second specific example, the switch 3 can be omitted, and the predetermined effect can be realized with a simpler configuration.

Further, in addition to the above structure, as shown in FIG.
The switch 3 may be provided between the signal converter 4 and the concentrator 5.

[0032]

Since the VoDSL device according to the present invention is configured as described above, it has the following effects. (1) If the other party is an analog telephone connected to the same VoDSL device, the voice data is not sent to the outside line, so the bandwidth used by another analog telephone or information processing device that shares the same DSL bandwidth is consumed. The bandwidth can be effectively used without doing so. (2) Since the voice data does not use the DSL and the station side device, the voice data is not subject to the charging that occurs when the station device is used, and the communication cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a first specific example of a VoDSL device of the present invention.

FIG. 2 is a block diagram of a second specific example of the present invention.

FIG. 3 is a block diagram showing another configuration example.

[Explanation of symbols]

1 VoDSL device 2, 2A, 2B analog telephone 3 switches 4, 4A, 4B signal converter 5 Concentrator 6 DSL modem 7 DSL 8 station building equipment 9 headend DSL modem 10 Translator 11 Ringa 12 tone generator 13 Information processing equipment

Claims (4)

[Claims] 1. A signal conversion unit comprising an A / D converter for converting a voice signal from an analog telephone into a digital signal and a D / A converter for converting a received ATM cell into an analog signal, and the plurality of signal conversion units. A concentrator for distributing the digital signals output from the A / D converter of the signal conversion unit into ATM cells, multiplexing and concentrating the ATM cells, and distributing the ATM cells received from the digital subscriber line to predetermined analog telephones. A VoDSL device comprising a DSL modem for modulating ATM cells multiplexed by the concentrator and transmitting the modulated ATM cells to the digital subscriber line and demodulating a signal received from the digital subscriber line to input the demodulated signal to the concentrator. In the above, the analog telephone on the calling side directly connected to the VoDSL device is connected to the analog telephone on the called side directly connected to the VoDSL device. In order to specify a telephone, a translator for receiving an identification signal sent from the calling analog telephone and identifying the receiving analog telephone based on the received identification signal, and a called side output from the translator A switch means for controlling connection between the analog telephone on the calling side and the analog telephone on the receiving side based on a signal for specifying the analog telephone, and the switch means includes the analog telephone and the signal converter. A VoDSL device, characterized in that it is provided between. 2. A signal conversion unit comprising an A / D converter for converting a voice signal from an analog telephone into a digital signal and a D / A converter for converting a received ATM cell into an analog signal, and the plurality of signal conversion units. A concentrator for distributing the digital signals output from the A / D converter of the signal conversion unit into ATM cells, multiplexing and concentrating the ATM cells, and distributing the ATM cells received from the digital subscriber line to predetermined analog telephones. A VoDSL device comprising a DSL modem for modulating ATM cells multiplexed by the concentrator and transmitting the modulated ATM cells to the digital subscriber line and demodulating a signal received from the digital subscriber line to input the demodulated signal to the concentrator. In the above, the analog telephone on the calling side directly connected to the VoDSL device is connected to the analog telephone on the called side directly connected to the VoDSL device. In order to specify a telephone, a translator for receiving an identification signal sent from the calling analog telephone and identifying the receiving analog telephone based on the received identification signal, and a called side output from the translator The switch means for controlling connection between the calling-side analog telephone and the receiving-side analog telephone based on a signal for specifying the analog telephone of (1), and the switching means includes the signal conversion section and the concentrator. A VoDSL device characterized by being provided between the two. 3. A signal converter comprising an A / D converter for converting a voice signal from an analog telephone into a digital signal and a D / A converter for converting a received ATM cell into an analog signal, and a plurality of the plurality of units. A concentrator for distributing the digital signals output from the A / D converter of the signal conversion unit into ATM cells, multiplexing and concentrating the ATM cells, and distributing the ATM cells received from the digital subscriber line to predetermined analog telephones. A VoDSL device comprising a DSL modem for modulating ATM cells multiplexed by the concentrator and transmitting the modulated ATM cells to the digital subscriber line and demodulating a signal received from the digital subscriber line to input the demodulated signal to the concentrator. In the above, the analog telephone on the calling side directly connected to the VoDSL device is connected to the analog telephone on the called side directly connected to the VoDSL device. In order to specify a telephone, a translator for receiving an identification signal sent from the calling analog telephone and identifying the receiving analog telephone based on the received identification signal, and a called side output from the translator A switch means for controlling connection between the calling-side analog telephone and the receiving-side analog telephone based on a signal for specifying the analog telephone of the above. The switch means is provided in the concentrator. Characteristic VoDSL device. 4. The ringer circuit provided in the VoDSL device, when the switch means connects the calling-side analog telephone and the called-side analog telephone, receives the incoming call through the switch means. And a tone generator circuit provided in the VoDSL device sends a ringback tone to the calling analog telephone via the switch means. The VoDSL device according to any one of Items 1 to 4.