JPH0918913A - Telephone exchange - Google Patents

Abstract

PURPOSE: To eliminate the need for wiring work by using optical space communication between a master set and an exclusive telephone set so as to eliminate the need for at least part of wired wiring between the master set and the exclusive telephone set. CONSTITUTION: The master set 1 controls the entire telephone exchange and an optical multiplex section 2 converts an electric signal resulting from multiplexing a signal of each line via a line 8 from the master set 1 into an infrared ray signal, the infrared ray is sent to an optical multiplex section 3, the infrared ray signal from the optical multiplex section 3 is converted into an electric signal and sent to the master set 1 via the line 8. The optical multiplex section 3 multiplexes the electric signal from exclusive telephone sets 4, 5, 6 via lines 9, 10, 11, converts it into an infrared ray signal and the result is sent to the optical multiplex section 2, from which the infrared ray signal is converted into an electric signal and sent to the exclusive telephone sets 4, 5, 6 via the lines 9, 10, 11. The infrared ray signal 7 is used for communication between the optical multiplexer sections 2, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange apparatus utilizing optical space communication.

[0002]

2. Description of the Related Art A conventional telephone exchange apparatus, which is generally called a key telephone apparatus, is composed of a main unit and a dedicated telephone, and a wired extension line is provided between the main unit and the dedicated telephone. Connected by.

FIG. 6 is a block diagram showing a concrete example of the configuration of a key telephone device.

As shown in the figure, the key telephone apparatus includes a main unit 901 which controls the entire key telephone unit, and a dedicated telephone 902 which operates under the control of the main unit 901.
903 and 904. The dedicated telephone 902,
An extension line 90 is provided between the main units 901 and 903 and 904.
5, 906 and 907 are connected. In addition, the main device 9
01 accommodates a telephone line 909 from the telephone network 908 as an outside line.

As can be seen from the configuration of FIG. 6, the main unit 901 communicates with a dedicated telephone to control the dedicated telephone, and extension lines 905 and 90 for performing voice communication.
6 and 907 are required, so the wired extension line 90
No. 5,906,907 had to be wired between the main unit and the dedicated telephone.

[0006]

However, in the above-mentioned conventional example, since the extension line must be wired between the main unit and the dedicated telephone, the main unit and the dedicated telephone should be separated by a passageway or the like. When connecting, there was an inconvenience such as wiring work.

It is an object of the first invention of the present application to provide a telephone exchange device which can eliminate the need for wiring work by making the extension line wireless.

A second invention of the present application is to provide a telephone exchange device capable of communicating with a plurality of dedicated telephones by one line of the wireless line of the first invention.

A third invention of the present application aims at providing a telephone exchange device capable of communicating with a larger number of dedicated telephones.

A fourth invention of the present application aims at providing a telephone exchange apparatus capable of communicating with a larger number of dedicated telephones, in the second invention.

[0011]

Means for Solving the Problems The first invention of the present application is:
In a telephone exchange device having a main device and a telephone, optical space communication is used as a communication means between the main device and a dedicated telephone.

A second invention of the present application is characterized in that the optical space communication means performs communication by multiplexing one or a plurality of lines and converting light into a beam.

A third invention of the present application is characterized in that a time division multiplexing system is used as the multiplexing means.

A fourth invention of the present application is characterized in that a frequency division multiplexing system is used as the multiplexing means.

[0015]

In the first invention of the present application, at least a part of the wired wiring between the main device and the dedicated telephone is unnecessary by using the optical space communication between the main device and the dedicated telephone. Therefore, wiring work can be eliminated.

In the second invention of the present application, the lines are multiplexed and the beam of light is used for communication, whereby the data of the lines of a plurality of dedicated telephones can be communicated by one line.
The optical space communication device can be efficiently used.

In the third invention of the present application, by using the time division multiplexing method as the multiplexing means, it is possible to support the communication between a large number of main devices and a dedicated telephone with one optical space communication line. The optical space communication device can be efficiently used.

In the fourth invention of the present application, by utilizing the time division multiplexing method as the multiplexing means, it is possible to support communication between a large number of main devices and a dedicated telephone with one optical space communication line. The optical space communication device can be efficiently used.

[0019]

1 is a block diagram showing a system configuration according to an embodiment of the present invention.

The main unit 1 controls the entire telephone switching system, and the optical multiplexing unit 2 converts an electric signal obtained by multiplexing signals of each line from the main unit 1 through the line 8 into an infrared signal. The main unit 1 converts the infrared signal from the optical multiplexer 3 by transmitting the infrared signal to the optical multiplexer 3 and converts the infrared signal from the optical multiplexer 3 into an electric signal.
It is to be transmitted via the line 8.

The optical multiplexer 3 multiplexes the electric signals from the dedicated telephones 4, 5, 6 via the lines 8, 9, 10 to convert them into infrared signals and transmits them to the optical multiplexer 2 for optical transmission. The infrared signal from the multiplexer 2 is converted into an electric signal to convert the lines 8, 9,
The data is transmitted to the dedicated telephones 4, 5, and 6 via 10.

The dedicated telephones 4, 5, 6 are connected to lines 8, 9, 1
The voice signal and the control signal are transmitted / received to / from the main device 1 via 0, and the incoming call display, the outgoing call control, and the voice call are performed under the control of the main device 1. Three
It is an infrared ray for communication between.

The main line 1 of the line 8 is the dedicated telephones 4, 5,
6 is a wired line for communicating a signal for controlling 6 and a voice signal between the main unit 1 and the optical multiplexing unit 2, and the lines 9, 10, 11 are dedicated telephones 4, 5, 6 respectively. Is a wired line for communication between the optical multiplexer 3 and the optical multiplexer 3.
The line 13 is a communication line for communicating between the main device 1 and the telephone network 12.

FIG. 2 is a detailed block diagram of the inside of the optical multiplexer 2.

The communication control units 201, 202 and 203 transmit / receive control data and voice data to / from the main unit 1, and transmit the communication data sent from the main unit 1 via the line 8 to the multiplexing circuit 204, On the contrary, it controls the sending of communication data from the distribution line 209 to the main unit 1 via the line 8, and is, for example, a so-called ping-pong transmission LSI.

The multiplexing circuit 204 includes a communication control unit 201,
This is a circuit that time-division-multiplexes the communication data from 202 and 203 and transmits the multiplexed signal to the modulator 205. The modulator 205 uses the signal from the multiplexing circuit such as pulse modulation or frequency modulation. Modulation and amplifier 20
The signal modulated in 6 is transmitted.

The amplifier 206 converts the modulated signal from the modulator 205 into an electric signal amplified to drive the LED 207. The LED 207 converts the electric signal from the amplifier 206 into an infrared light signal. To do. The lens 208 collects the infrared light from the LED 207, forms it into a beam, and sends it out as an optical signal 7. The distribution circuit 209 communicates the time-division-multiplexed signal from the demodulator 210. 201, 202, 2
It is a distribution circuit that distributes to 03.

The demodulator 210 demodulates the modulated signal from the amplifier 211, and the amplifier 211 amplifies the electric signal from the photodiode (PD) 212 and transmits the signal to the demodulator 210. is there. The photodiode (PD) 212 converts an infrared light signal collected by the lens 213 into an electric signal and transmits the electric signal to the amplifier 211. The lens 213 is a beam-shaped light from the optical multiplexing unit 3. The optical signal 7 is collected and the optical signal is transmitted to the PD 212.

FIG. 3 is a detailed block diagram of the inside of the optical multiplexer 3.

The communication control units 301, 302 and 303, like the communication control units 201, 202 and 203, communicate with the dedicated telephones 4, 5 and 6 via the lines 9, 10 and 11, respectively, Control data and voice data are transmitted / received to / from each dedicated telephone, communication data from each dedicated telephone is transmitted to the multiplexing circuit 304, and conversely, communication data from the distribution circuit 309 is dedicated to each via the lines 9, 10 and 11. It controls sending to a telephone, and is, for example, a so-called ping-pong transmission LSI.

The multiplexing circuit 304 is the multiplexing circuit 20.
4, the communication data from the communication control units 301, 302, 303 is time-division multiplexed, and the modulator 30
5, the amplifier 306, the LED 307, and the lens 308 have the same functions as the modulator 205, the amplifier 206, the LED 207, and the lens 208, respectively.

The distribution circuit 309 receives the time-division multiplexed signals from the demodulator 310 as communication control units 301, 302, 3 and 3.
03, a demodulator 310, an amplifier 311, a photodiode (PD) 312, a lens 31.
The demodulator 210 and the amplifier 211 have the same functions as the photodiode (PD) 212 and the lens 213, respectively.

When the modulated signal is converted into an optical signal, light intensity modulation for changing the intensity of light is used. In addition, the demodulation naturally involves the light intensity demodulation.

Here, the case where the control data and the voice data are transmitted from the main unit 1 to the dedicated telephone 4 will be described.

First, control data and voice data for the dedicated telephones 4, 5, 6 are transmitted from the main unit 1 to the line 8. These control data and voice data are transmitted through the line 8, and, for example, the control data and voice data of the dedicated telephone 4 are received by the communication control unit 201 of the optical multiplexing unit 2. The communication control unit 201 further sends the received control data and voice data to the multiplexing circuit 204.

These operations are the same when the control data and the voice data are transmitted from the main unit 1 to the dedicated telephones 5 and 6, and the control data and the voice data to the dedicated telephone 5 are transmitted via the line 8, for example. The control data and voice data for the dedicated telephone 6 are transmitted to the communication control unit 202, and are also transmitted to the communication control unit 203. Then, similarly to the communication control unit 201, the communication control unit 202 sends control data and voice data to the dedicated telephone 5 to the multiplexing circuit 204, and the communication control unit 203 controls the dedicated telephone 6 to the multiplexing circuit 204. Data and voice data are sent.

In the multiplexing circuit 204, the communication control unit 20
Dedicated telephones 4, 5, respectively from 1, 202, 203
The control data and the audio data to the H. 6 are time-division multiplexed in the format as shown in FIG. 4, for example.

Next, FIG. 4 will be described. Data is multiplexed along the time axis in the figure. And 401 is control data for the dedicated telephone 4,
Reference numeral 402 is voice data for the dedicated telephone 4. Also,
403 is control data for the dedicated telephone 5, and 404
Is voice data to the dedicated telephone 5. Furthermore, 40
5 is control data for the dedicated telephone 6, and 406 is
It is voice data to the dedicated telephone 6.

That is, the multiplexing circuit 204 first sends control data and voice data from the communication control unit 201 to the dedicated telephone set 4 to the modulator 205, and thereafter, the communication control unit 20.
2 sends control data and voice data to the dedicated telephone 5 to the modulator 205, and further transmits control data and voice data from the communication control unit 203 to the dedicated telephone 6 to the modulator 205.
To send to. By doing so, the control data and the voice data for the dedicated telephones 4, 5, 6 can be multiplexed in a time division manner.

In this way, the control data and voice data for the dedicated telephones 4, 5, and 6 are time-division multiplexed, and the signal is transmitted from the multiplexing circuit 204 to the modulator 205.
Then, this signal is modulated by the modulator 205 and transmitted to the amplifier 206. The amplifier 206 drives the LED 207 according to the modulated signal, and the infrared light emitted from the LED passes through the lens 208 to form the beam-shaped infrared light 7. Is output to the optical multiplexing unit 3.

The infrared ray 7 from the optical multiplexing unit 2 is received by the lens 313 of the optical multiplexing unit 3 and is condensed to form the PD 312.
Is converted into an electric signal. Further, the electric signal amplified by the amplifier 311 and input to the demodulator 310 and demodulated here is transmitted to the distribution circuit 309.

The signal input to the distribution circuit 309 is as shown in FIG.
According to this format, control data and voice data are distributed to each dedicated telephone based on this format.

That is, the control data 40 for the dedicated telephone 4
1 and voice data 402 are transmitted to the communication control unit 301,
Control data 403 and voice data 404 to the dedicated telephone 5
Is transmitted to the communication control unit 302, and the control data 405 and voice data 406 to the dedicated telephone 6 are transmitted to the communication control unit 303.
To communicate to.

The respective communication control units 301, 302, 303 are
The received control data and voice data to the dedicated telephones 4, 5 and 6 are transmitted via the lines 9, 10 and 11. In this way, each dedicated telephone 4 from the main device 1,
The control data and voice data are transmitted to 5 and 6, the dedicated telephone is controlled by the main unit, and the voice is transmitted from the dedicated telephone.

Next, a case where control data such as key input and voice data are transmitted from the dedicated telephones 4, 5, 6 to the main unit 1 will be described.

First, control data and voice data to the main unit are transmitted from the dedicated telephones 4, 5, 6 to the respective lines 9, 10, 11. These control data and voice data are transmitted through the lines 9, 10 and 11, the control data and voice data from the dedicated telephone 4 are received by the communication control unit 301, and the control data and voice data from the dedicated telephone 5 are received. The communication control unit 302 receives the control data and the voice data from the dedicated telephone 6, and the communication control unit 303 receives the control data and the voice data.
2, 303 is sent to the multiplexing circuit 304.

In the multiplexing circuit 304, the communication control unit 30
Dedicated telephones 4, 5, 6 from 1, 302, 303 respectively
The control data and the voice data are time-division multiplexed into a format as shown in FIG.

In this way, the control data and voice data from the dedicated telephones 4, 5, 6 can be multiplexed in a time division manner.

Then, the time-division multiplexed signal is transmitted from the multiplexing circuit 304 to the modulator 305.
After that, this signal is modulated by the modulator 305 and the amplifier 3
06, the amplifier 306 drives the LED 307 in accordance with the modulated signal, and the infrared ray emitted from the LED passes through the lens 308 to form a beam-shaped infrared ray 7.
Is output to the optical multiplexing unit 2.

The infrared rays 7 from the optical multiplexing unit 3 are received by the lens 213 of the optical multiplexing unit 2 and condensed, and the PD 212 is received.
Is converted into an electric signal. Further, the electric signal amplified by the amplifier 211, input to the demodulator 210, and demodulated here is transmitted to the distribution circuit 209.

The signal input to the distribution circuit 209 is as shown in FIG.
According to this format, control data and voice data are distributed to each dedicated telephone based on this format.

That is, the control data 40 for the dedicated telephone 4
1 and voice data 402 are transmitted to the communication control unit 201,
Control data 403 and voice data 404 to the dedicated telephone 5
Is transmitted to the communication control unit 202, and the control data 405 and voice data 406 for the dedicated telephone 6 are transmitted to the communication control unit 203.
To communicate to.

Each of the communication control units 201, 202 and 203 transmits the received control data and voice data for each dedicated telephone to the main unit via the line 8. In this way, the control data and the voice data from each dedicated telephone are transmitted to the main device, and the main device performs the control data process and the voice data exchange process.

In this way, telephone exchange can be performed using the beam-shaped optical space communication means.

Next, a second embodiment of the present invention will be described.

In the first embodiment, the time division multiplexing means is used as the multiplexing means, but this may be another method, for example, frequency division multiplexing means.

The case where the frequency division multiplexing means is used will be described below. Since the configuration of the second embodiment is the same as that of the first embodiment, the description thereof is omitted.
The operation will be described with reference to FIGS. 1, 2, and 3.

Here, from the main unit 1 to the dedicated telephones 4, 5,
A case where the control data and the voice data are transmitted to 6 will be described.

The control data and voice data for each dedicated telephone are transmitted to the communication control units 201, 202 and 203 and are sent to the multiplexing circuit 204 in the same manner as in the first embodiment.

In the multiplexing circuit 204, the communication control unit 20
Control data and voice data from 1, 202, 203 to the dedicated telephones 4, 5, 6 are divided by frequency and multiplexed as shown in FIG. 5, for example. Next, FIG. 5 will be described. The frequency increases from left to right, for example, along the frequency axis in the figure. Then, a band of a certain frequency is assigned to the control data or voice data of each dedicated telephone.

In the example of FIG. 5, frequencies F1 to F2 (501) are assigned to the control data for the dedicated telephone 4,
The frequencies F3 to F4 (502) are assigned to the voice data to the dedicated telephone set 4. Similarly, frequencies F5 to F6 (503) are dedicated to control data to the dedicated telephone 5, frequencies F7 to F8 (504) are dedicated to voice data to the dedicated telephone 5, and frequencies F9 to F10 (505) are dedicated. The frequency F is included in the control data for the telephone 6.
11 to F12 (506) are assigned to voice data to the dedicated telephone set 6.

Then, each control data and voice data are modulated in the allocated frequency band (for example, FM modulation).
So that the data can be transmitted. Multiplexing circuit 204
Then, frequency multiplexing is performed in this way, and the multiplexed signal is sent to the modulator 205. After that,
This is similar to the first embodiment.

Then, the multiplexed signal is input from the demodulator 310 to the distribution circuit 309 of the optical multiplexing unit 3. The distribution circuit 309 performs filtering for each frequency band according to the frequency division method of FIG. 5, and for example, a signal in the frequency band of 501 is demodulated and reproduced as control data for the dedicated telephone set 4, and is sent to the communication control unit 301. To do.

Further, the signal in the frequency band 502 is demodulated and reproduced as voice data to the dedicated telephone set 4 and sent to the communication control section 301. Other frequency bands 503, 504, 5
The same applies to 05 and 506, which are demodulated and reproduced and sent to the communication control units 302 and 303. The subsequent operation is the same as in the first embodiment.

On the contrary, from the dedicated telephones 4, 5, 6 to the main unit 1
Also in the case where the control data and the voice data are transmitted, the control data and the voice data can be frequency-multiplexed and transmitted by the same operation as described above. However,
In this case, the multiplexing circuit is 304 and the distribution circuit is 20.
It becomes 9.

The other operations are the same as in the case where the control data and the voice data are transmitted from the main device 1 to the dedicated telephones 4, 5, and 6 described above.

In this way, by using frequency division multiplexing, communication between the main unit and the dedicated telephone can be performed, and it can function as a telephone exchange.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be further modified.

For example, in the above-mentioned first embodiment, the communication between the main unit and the communication control unit, and the communication between the communication control unit and the dedicated telephone is explained as a so-called ping-pong transmission system. It may be a system. Also, the number of dedicated telephones and the like are described as three, but other numbers may be used. Further, the optical multiplexing means is described as one set of the optical multiplexing section 2 and the optical multiplexing section 3, but any number of sets of optical multiplexing sections may be connected to one main device.

Further, in the second embodiment, when frequency multiplexing is performed, a frequency band is assigned to one signal and F is assigned.
Although M modulation is described, this may be performed by another method, for example, one frequency may be assigned to one signal for baseband transmission.

[0071]

As described above, according to the first invention of the present application, by using the optical space communication between the main device and the dedicated telephone, the wired connection between the main device and the dedicated telephone can be achieved. There is an effect that at least a part of the wiring can be made unnecessary and wiring work can be made unnecessary.

Further, since the wireless communication is performed by the optical space communication, for example, when the main device and the telephone are installed with the passage separated from each other, it is not necessary to provide wiring in the passage, and the passage is provided by wiring on the floor. There is an effect that the problem of being hard to pass does not occur.

Further, according to the second invention of the present application, the data of the lines of a plurality of dedicated telephones can be communicated by one line by multiplexing, and the optical space communication device can be efficiently used. There is an effect that can be.

Further, according to the third invention of the present application, by utilizing the time division multiplexing system, it is possible to support communication between a large number of main devices and a dedicated telephone with one optical space communication line. There is an effect that the communication device can be used efficiently.

Further, according to the fourth invention of the present application, by utilizing the time division multiplexing system, it is possible to support communication between a large number of main devices and a dedicated telephone by one optical space communication line. There is an effect that the communication device can be used efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a detailed block diagram of the inside of the optical multiplexing unit of the above embodiment.

FIG. 3 is a detailed block diagram of the inside of the optical multiplexing unit of the above embodiment.

FIG. 4 is an explanatory diagram showing a time division multiplexing format of control data and audio data in the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a frequency division multiplexing format of control data and audio data in the second embodiment of the present invention.

FIG. 6 is a block diagram showing a system configuration of a conventional example.

[Explanation of symbols]

 1 ... Main device, 2, 3 ... Optical multiplexing unit, 4, 5, 6 ... Private telephone, 7 ... Infrared, 8, 9, 10, 11, 13 ... Line, 12 ... Telephone network.

Claims (4)

[Claims] 1. A telephone exchange apparatus having a main unit and a telephone, wherein an optical space communication unit is used as a communication unit between the main unit and the telephone. 2. The optical space communication unit according to claim 1, wherein the optical space communication unit has a multiplexing unit that multiplexes the lines, and multiplexes one or more lines that connect the main device and the telephone to each other to form a beam of light. A telephone exchange device characterized by communicating with each other. 3. The telephone exchange device according to claim 2, wherein a time division multiplexing system is used as the multiplexing means. 4. The telephone exchange apparatus according to claim 2, wherein a frequency division multiplexing system is used as the multiplexing means.