JPH0292045A - Connection system between telephone terminal set and subscriber circuit - Google Patents

Abstract

PURPOSE:To eliminate the need for a connection cable between a telephone set and a subscriber circuit and to avoid a trouble by the use of the connection cable by devising the connection system such that the connection between plural telephone terminal sets (telephone sets) and subscriber circuits of time division private branch of exchanges (PBX) corresponding to respective telephone sets is implemented in a radio wave. CONSTITUTION:No connection cable is used between a telephone set and a subscriber circuit, the telephone set is fed by a power supply section 1, an identification code is given by an identification code provision means 8 to a speech signal from the telephone set, a radio section 2 having the 1st carrier FA sends the carrier, a code generation and decoding section 4 encodes a control signal for the exchange procedure respectively, an identification code provision means 8 gives an identification code and a radio section 6 having the 3rd carrier FC sends the result. A radio section 3 receives a speech signal in the carrier FA in the subscriber circuit, a radio section 7 receives the control signal in the carrier FC and an identification code discrimination means 11 fetches the signal when it discriminates the code to be the identification code of a corresponding telephone set. Moreover, the content of the encoded control signal is decoded by the code generation decoding section 5 and the signal is given to a PBX. The speech signal and the control signal from the subscriber to the telephone set are processed similarly.

Description

[Detailed Description of the Invention] [Summary] The object of the present invention is to provide a connection method between a telephone terminal and a subscriber circuit that can eliminate the troublesome use of connection cables. The telephone terminal includes a power supply section that supplies power internally, a radio section that has a first carrier wave that transmits a call signal and receives a signal of a second carrier wave, and a control signal for the exchange procedure. a code creation and decoding unit that encodes and decodes; a radio unit that has a third carrier wave that transmits the encoded control signal and receives the signal of the fourth carrier wave; and a radio unit that transmits the call signal and the control signal. An identification code assigning means for assigning an identification code and an identification code determining means for discriminating the identification code when a signal assigned an identification code is received, and a second carrier wave for transmitting a call signal is provided in the subscriber circuit. a wireless unit having a radio unit and receiving a signal of the first carrier wave;
a code creation and decoding unit that encodes and decodes control signals for the exchange procedure; a radio unit that has a fourth carrier wave that transmits the encoded control signal and receives a signal of the third carrier wave; The configuration includes an identification code adding means for adding an identification code to a transmitted call signal and a control signal, and an identification code determining means for determining the identification code when a signal to which an identification code is added is received.

[Industrial application field]

The present invention provides a method for connecting a plurality of telephone terminals (hereinafter referred to as telephones) and a subscriber circuit of a time division private branch exchange (hereinafter referred to as PBX) corresponding to each telephone terminal wirelessly. Regarding the connection method.

[Conventional technology]

A conventional example will be explained below using figures.

FIG. 8 is a diagram showing the connection between a conventional telephone and a subscriber circuit.

Conventionally, as shown in FIG. 8, each telephone T0.71 is connected to subscriber circuits 74.75 through connection cables 72.73.

Each of the subscriber circuits 74 and 75 includes a telephone 70.
71, detect the presence or absence of the current and monitor call origination, disconnection, etc. of the telephone, send a ringing signal to the telephone, A-D conversion of audio, 2-wire, 4-wire, etc.
It is equipped with a so-called BOR3CHT function such as line conversion, and executes a series of exchange procedures such as transmission of a call 1 selection signal, 1il1 talk, and power supply with a telephone.

However, a connection cable is required between the telephone and the subscriber's circuit, so if the telephone is moved, the connection cable must be reconnected, and if a new telephone is installed, a connection cable must be installed. This was troublesome, and when a large number of telephones were installed to open a new office, it affected the layout of the office desk.

In order to relieve this inconvenience, a so-called free access floor structure has been adopted, but in today's high-rise buildings, this free access space has become prohibitive because it greatly increases construction costs. Ta.

[Problem to be solved by the invention]

As explained above, accommodating connection cables in facilities has become a troublesome problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection method between a telephone terminal and a subscriber circuit that can eliminate the troublesome use of connection cables.

[Means to solve the problem]

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

As shown in FIG. 1, the telephone terminal has a power supply unit l that supplies power internally, a first carrier wave FA that transmits a call signal, and a radio unit 2 that receives a signal of a second carrier wave FB. and a code creation and decoding unit 4 that encodes and decodes control signals for the exchange procedure, and a third carrier FC that transmits the encoded control signal and receives a signal of a fourth carrier FD. A radio unit 6 is provided, an identification code adding means 8 which adds an identification code to a transmitted call signal and a control signal, and an identification code discriminating means 10 which judges the identification code when a signal to which an identification code is added is received.

The subscriber circuit also has a second carrier wave F for transmitting a call signal.
a radio section 3 which has a carrier wave B and receives the signal of the first carrier wave FA; a code creation and decoding section 5 which encodes and decodes the control signal for the exchange procedure; and a code generation and decoding section 5 which transmits the encoded control signal. a radio section 7 having a fourth carrier wave FD and receiving a signal of a third carrier wave FC; an identification code adding means 9 that adds an identification code to the transmitted call signal and control signal;
An identification code discriminating means 11 is provided for discriminating an identification code when a signal to which an identification code is attached is received.

[For production]

According to the present invention, a connection cable is not used between the telephone and the subscriber circuit, power is supplied to the telephone by the power supply part l, and the call signal from the telephone is only transmitted to the subscriber circuit corresponding to the telephone. In order to allow the first carrier wave FA to receive the call signal, an identification mark is given by the identification code giving means 8, and the first carrier wave FA
Each control signal for the exchange procedure is encoded by the code creation and decoding unit 4, and an identification code is assigned by the identification code assigning means 8 for the above-mentioned reason. ,°
Transmission is performed using the radio section 6 having the second carrier wave FC.

On the other hand, in the subscriber circuit, the radio section 3 receives the call signal of the first carrier wave FA, the radio section 7 receives the control signal of the third carrier wave FC, and the identification code discriminating means 11 receives the call signal of the first carrier wave FA. It is determined whether it is a telephone identification code, and if it is, it is captured, and if it is not, it is not captured.

Note that the coded control signal is decoded by the code creation/decoding unit 5 and passed to the PBX side.

The call signal and control signal from the subscriber circuit to the telephone are also given identification codes in the same manner as above, and the call signal is sent from the radio unit 3 having the third carrier wave FC, and the control signal 18 is sent to the telephone unit by the radio unit 3 having the fourth carrier wave FD. It is transmitted from the wireless section 7 and sent to the wireless section 2. It is received by the radio section 6, and the identification code determining means 10 determines whether it is the identification code of the corresponding subscriber circuit. If so, it is taken in, and if not, it is not taken in.

Of course, the coded control signal is decoded by the code creation/decoding section 4 and passed to the control section of the telephone.

Therefore, there is no need for a connection cable, and the trouble of using a connection cable can be eliminated.

〔Example〕

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

FIG. 2 is a block diagram showing the configuration of the transmitting side according to the embodiment of the present invention, FIG. 3 is a block diagram showing the configuration of the receiving side according to the embodiment of the present invention, and FIG. 4 is a block diagram showing the configuration of the receiving side according to the embodiment of the present invention. 5 is a diagram showing an example of the configuration of the nodes in FIG. 4, FIG. 6 is a diagram showing signal distribution in the case of FIG. 5, and FIG. FIG. 3 is a sequence diagram in the case of a call.

In the case of the present invention, the connection cable is eliminated and the connection is made wirelessly, but since there is a limit on the allocated frequency, four waves are used and weak radio waves are used, so the subscriber circuit is connected to the telephone,
In order to transmit and receive weak radio waves, nodes 81 to 86 each having a plurality of subscriber circuits with radio sections are provided on each floor and every partition, as shown in FIG.

Also, if the room is large enough, it should be installed in a place where communication is possible using weak radio waves.

The configuration of each node is as shown in Fig. 5. For example, 64 subscriber circuits with radio sections, SO to S63, are time-division multiplexed and separated by one in the line concentrator 60, and are connected to the PBX using optical or coaxial cables. For example, transmission and reception are performed at 16 Mbps.

In this case, the distribution of signals in the subscriber circuits SO to S63 is as shown in FIG.
CM audio signal transmitter (carrier FB) 61, PCM audio signal receiver 62. Digital control signal transmitter 63 (111
Since there are four states, 4 Mb pS is allocated and the control circuit 65 (
Selection signals 5EL00 to 5EL63 to be assigned to 64 subscriber circuits as shown in B) are issued, and selection signals 5EL00 to 5EL63 are assigned to 64 subscriber circuits as shown in FIG.
64 μs 8-bit signals from each subscriber circuit are time-division multiplexed and separated.

In this case, in each subscriber circuit, the identification code assigning means 9 assigns an identification code to the voice signal and the control signal every 8 bits, and the identification code discriminating means 11 discriminates the identification code. Capture only those addressed to the circuit.

Next, the subscriber circuit and the transmission side of the telephone will be explained using FIG. 2, taking as a typical example the case of a voice signal in the subscriber circuit SO in FIG. 6.

The 4 Mbps signal transmitted from the PCM bus to the subscriber circuit SO for 2 μs out of 128 μs is selected by the selection signal 5ELOO shown in FIG. , 256 Kbps and input to the AND circuit 26.

The AND circuits 26 and 27 input the 72 .mu.s of the Lebel signal for each 32 .mu.s out of 128 .mu.s as shown in (T2) and (TI). T
I and T2 are input through the AND circuit 28, and the ID setting section 24 inputs, for example, 01 to the AND circuit 27.
The identification code set to 111000 is the ID register 23
At the output of the OR circuit 25, an 8-bit identification code and an 8-bit PCM audio signal as shown in (A) are connected in series and input to the FSK modulator 21.

Note that the signal GT is the signal T from the AND circuit 28 at the time of startup.
This is a signal for prohibiting the transmission of 2, stopping unnecessary audio signal transmission from the memory 22, and transmitting only the identification code to prevent noise from being mixed in.

In the FSK modulator 21, the Lebel signal is fl.

The 0 level signal is shifted by 12 minutes and transmitted to the radio transmitter 20. on the carrier FB. transmitted via antenna.

In the case of a control signal, the signal from the control signal transmission bus, in which the control signal for the exchange procedure is encoded by the code creation and decoding unit 5, is
128 to the subscriber circuit SO, as in the case of voice signals.
The 4 Mbps signal transmitted for 2 μs out of μs is selected using the AND circuit 30 using the selection signal 5ELOO, and is manually stored in the memory 22. As shown in the figure, the FSX modulator 21 . The II transmission wave is transmitted from the FD's wireless transmitter 20 via the antenna.

Regarding this transmission, the same is true for telephones, but the carrier wave of the wireless transmitter 20 is different, and in the case of voice signals, the FA
In the case of a control signal, it is FC.

Next, the receiving side of the subscriber circuit and the telephone set will be explained using FIG. 3, taking as a representative example the case of a voice signal in the subscriber circuit SO of FIG. 6.

The audio signal of the carrier wave FA that has been sent is received by the radio receiver 40 that receives the audio signal of the carrier wave FA, and is sent to FSKy.
The signal is demodulated by the t-modulator 41 and input to the AND circuit 44 .

On the other hand, the detection output of the FSK demodulator 41 as shown in (A) is
The input is input to the head detection circuit 42, the head is detected, and a pulse as shown in (T3) is output to the counter 43 to start it.
The AND circuit 44 is released and output for 6 bits, the 8-bit identification code and the 8-bit PCM audio signal are input to the shift register 45, and the ID verification circuit 46 inputs the 8-bit identification code and the 8-bit PCM audio signal.
The identification code is compared with the code set in the ID setting section 24,
If they match, the Lebel signal is output to the AND circuit 47 to output the signal shown in (T2) in FIG. to be memorized. Then, it is read as a 4 Mbps signal using the selection signal 5ELOO in FIG. 6, inputted to the AND circuit 31 in FIG. 2, and transmitted via the PCM reception bus.

The same is true for control signal reception, but the carrier wave of the received signal is FC, and the signal 3n extracted from the memory 48 is output from the AND circuit 32 in FIG.
It is decoded and sent to the PBX.

On the receiving side, the same applies to telephones, but the carrier wave of the received signal is FB in the case of a voice signal and FD in the case of a control signal.

Next, the exchange procedure will be explained using FIG. 7, taking the case of a call as an example.

When the telephone starts to make a call in step 1, in step 2, an A code with an identification code indicating a call is transmitted by the radio section of the carrier wave FC.

Then, the subscriber circuit receives the A code in step 3, activates the subscriber circuit, decodes the identification code in step 4 and identifies the calling telephone, and in step 5, if the identification codes match, The voice channel is opened, and a B code with an identification code indicating that reception is possible is transmitted via the radio section of the carrier wave FD.

Then, the telephone receives the B code in Step 6, and transmits the C code with identification code of the selection signal to the carrier wave FC in Step 7.
on the radio section of the station to inform the subscriber that the other party is being called.

The subscriber circuit then establishes a connection with the other party in step 8, and when the other party responds, transmits the D code with identification code of the response signal using the radio section of the carrier wave FD.

Then, the telephone receives the D code in step 9, disconnects the calling signal, and enters the talking state in step 10.

In this case, a voice code with an identification code is sent from the wireless section of the carrier wave FA from the telephone to the subscriber circuit, a voice code with an identification code is sent from the subscriber circuit to the telephone from the radio section of the carrier wave FB, and the voice code with an identification code is sent from the subscriber circuit to the telephone. When the subscriber circuit receives a disconnection signal, the receiver transmits an F code with an identification code indicating disconnection from the radio section of the carrier wave FC or FD, and when the telephone or subscriber circuit receives this, it returns to the initial state. Become.

In this way, the voice signal is transmitted and received between the telephone set and the voice radio section of the subscriber circuit, and the control signal is transmitted and received between the telephone set and the control signal radio section of the subscriber circuit, and the control signal is transmitted and received between the telephone set and the control signal radio section of the subscriber circuit. Communication between the subscriber circuits and the subscriber circuits is carried out using identification codes, so there are four radio carrier waves.
In addition, wireless communication is possible without the need for a connection cable.

Note that the power supply section l of the telephone may be operated with electric power from a commercial power source, or may be operated with a battery. Furthermore, each node requires a power supply device that converts commercial power to supply the required voltage, but this is not shown in the figure.

〔Effect of the invention〕

As described in detail above, according to the present invention, there is no need for a connecting cable between the telephone set and the subscriber circuit, so there is an effect of eliminating the troublesome use of the connecting cable.

[Brief explanation of drawings]

Fig. 1 is a block diagram of the principle of the present invention. Fig. 2 is a block diagram showing the configuration of the transmitting side of an embodiment of the present invention. Fig. 3 is a block diagram showing the configuration of the receiving side of the embodiment of the present invention. , FIG. 4 is a diagram showing the arrangement of the subscriber circuit according to the embodiment of the present invention, FIG. 5 is a diagram showing an example of the configuration of the node in FIG. 4, and FIG. 6 is a diagram showing the signal distribution in the case of FIG. 5. 7 is a sequence diagram for a call origination according to an embodiment of the present invention, and FIG. 8 is a diagram showing a connection between a conventional telephone and a subscriber circuit. In the figure, 1 is a power feeding section, 2, 3. 6. 7 is a radio section, 4.5 is a code creation and decoding section, 8.9 is an identification code adding means, io and xi are identification code discrimination means, 20 is a radio transmitter, 21 is an FSK modulator, 22.48 is a memory, 23 is an ID register, 24 is an ID setting section, 25 is an OR circuit, 26 to 32.44, 47.50 to 57 are AND circuits, 40 is a radio reception section, 41 is an FSK demodulator, 42 is a head detection circuit, 43 is a counter, 45 is a shift register, 46 is an ID verification circuit, 60 is a line concentrator, 61 is a PCM audio transmitter, 62 is a PCM audio receiver, 63 is a digital control signal transmitter, 64 is a digital control signal receiver, 65 70.71 is a telephone, 74.75 is a subscriber circuit, 76 is a time-division channel switch, 81 to 86 are nodes, and 30 to 363 is a wireless unit additional input circuit. Enshi and 6 convex σ nodes σ) 2 rate kui 4 home nizumachi δ 斤, zocho S0 mine 5 ro 5th C iN's Takarishikai () i $ 5 distribution i) ＼? Mouth R1-chome [A] Mine 6 Diagram (1 of ¥)

Claims (1)

[Claims] When connecting a plurality of telephone terminals to a subscriber circuit of a time-sharing private branch exchange corresponding to each telephone terminal, each of the plurality of telephone terminals has a power supply unit (
1), a radio section (2) having a first carrier wave (FA) for transmitting a call signal and receiving a signal of a second carrier wave (FB), and a radio section (2) for encoding a control signal for an exchange procedure; a code creation and decoding unit (4) for decoding; a radio unit (6) having a third carrier (FC) for transmitting the encoded control signal and receiving a signal of the fourth carrier (FD); , an identification code assigning means (8) for assigning an identification code to the transmitted call signal and control signal, and an identification code discriminating means (10) for discriminating the identification code when a signal assigned an identification code is received; The subscriber circuit includes a radio section (3) having a second carrier wave (FB) for transmitting a call signal and receiving a signal of the first carrier wave (FA), and a control signal for the exchange procedure. a code creation and decoding unit (5) that encodes and decodes the code, and a radio unit that has a fourth carrier wave (FD) that transmits the encoded control signal and receives the signal of the third carrier wave (FC). (7) and identification code adding means (9) for adding an identification code to the transmitted call signal and control signal; and identification code determining means (11) for determining the identification code when a signal to which an identification code has been added is received. A connection method between a telephone terminal and a subscriber circuit, characterized in that the telephone terminal and the subscriber circuit corresponding to each telephone terminal are wirelessly connected.