JPS62135097A - Control system for bus-type connection telephone set - Google Patents

Abstract

PURPOSE:To control the states of plural telephone sets without depending on the connected transmission channel by relaying and transmitting the control signal for a telephone set connected to a transmission channel different from the control signal line by means of a gateway to inform the main equipment that executes a telephone set control such as issuing a selection signal to a trunk line. CONSTITUTION:The main equipment 2 has various functions to execute the following: line exchange between a telephone line 1 and information signal lines 4-6, detection of the incoming of a call to the telephone line 1, the detection of the collision of the outgoing and incoming the detection of polarity-inversion, the transmission of a selection signal, the closing of a DC loop, and the transmission, the reception, and the interpretation of a control information between a control signal line 3 and itself. The telephone set 33 is connected to the line 3 and the information signal lines 4-6, and is controllable by a control information exchanged between itself and the main equipment 2. In case of making a trunk line call to the line 1 from a telephone set 37, a control signal is transmitted and received between a CPU control part 28 and the equipment 2 through the gateway 32. In such a way, the switching control of a transmission channel for an information signal and the speaking-line control are executed.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is directed to a home network system (home bus).
The present invention relates to a control system for telephones connected to different transmission lines in a bus-like manner.

2. Description of the Related Art The configuration shown in FIG. 4 has often been used as a connection form for conventional bus-type telephones. That is, the main device 38 in FIG. 4 accommodates a telephone port @1, and performs functions such as detecting incoming calls to the telephone line 1, detecting call collisions, detecting polarity reversals, sending dial selection signals, and closing DC loops. Information signal port @4 which is equipped with functions and constitutes a bus within the premises. s
, e and the control signal line 3, which are connected to the same transmission line system in the form of a bus, are controlled by the main device 38 transmitting and receiving control information using the control signal port @3. . FIG. 6 shows control output such as commands using the control signal line 3 when a call is made to the telephone line 1, which is a central office line, from the telephones 34 and 35 connected like a bus to the same transmission line in the configuration shown in FIG. Information main device 38 and telephone 34.35
It is a diagram showing a communication sequence between. The telephone 34 converts the off-footer of the transmitting/receiving section 16 to the CPUllgIJ section 1.
6, the CPU control unit 16 transmits a control signal to the main device 38 via the transceiver 13 to notify off-hook. Furthermore, when a central office line is selected with the telephone 34, the CPU control unit 16 notifies the main device 38 of the telephone line designation with the selected central line No. Line 4,
5. After the main device 38 captures the telephone line specified in 6 and transmits the permission to use the office line for which the telephone line designation request was made and the notification of the information signal line for which the captured use is permitted to the telephone 34, the telephone line 1 built in the main device 3 is transmitted. and information signal lines 4, 5, and 6, and connects the telephone line 1 to the information reliability line that is permitted to be used. Further, when the telephone 34 receives the notification of information signal line connection shown in FIG.
6 connects the information signal line that is permitted to be used by the main device 38, and the loop closing section 31 closes the DC loop to the telephone line 1, so that the telephone 34 is connected to the central office line and can transmit the selection signal. Become. Therefore, when a dial notification is sent from the telephone 34 to the main device 38, the main device 38 sends a selection signal corresponding to the dial notification to the telephone line 1 by controlling the selection signal transmitter built in the main device 38. As a result, the telephone set 34 becomes in a talking state via the telephone line 1.

In this manner, a method was used in which the main device 38 and the telephones 34, 35 were connected to the same control signal line and control information was transmitted and received according to a predetermined communication sequence.

In addition, regarding the components common to the embodiments of the present invention,
Some explanations will be omitted.

Problems to be Solved by the Invention In such a conventional method, the main device 38 can control the telephones 34 and 35 connected to the same transmission line system connected in a bus-like manner, but the telephones 34 and 35 are connected to different transmission lines. This has the disadvantage that the main device 38 cannot control all telephones at the same time. In addition, extension calls between telephones connected to different transmission lines have the disadvantage that the connection method is complicated due to the difference in the type of transmission medium that transmits information, and the control of the telephones by the main device 38 is complicated. have.

The present invention has been made in view of the above points, and it is possible to connect different transmission lines with a simple hardware configuration, and to efficiently control the telephones connected to each transmission line by the same main device, and from the main device. The present invention provides a method for controlling a bus-type connected telephone by controlling the telephone without being aware that it is connected to a different transmission path when viewing the telephone.

Means for Solving the Problems In order to solve the above problems, the present invention provides a method for connecting central office lines using telephone lines and information signal lines at a part of the gateway that interconnects bus-like transmission lines of different systems. A gateway is provided with a loop closure part that forms a DC loop, and further relays and transmits a communication circuit for modulating and demodulating information signals such as voice transmitted via the gland to a different transmission line system. When installed in telephones connected to different transmission line systems in the form of a bus, the telephones connected to different transmission lines can communicate with each other and with a central office line.

Furthermore, by relaying all the control information having the addresses of the telephones connected to the different transmission lines from the control signal line to the different transmission lines at the gateway, the telephones can be efficiently controlled by the main device. be.

Operation The present invention has the above-described configuration, and relays and transmits control signals of a telephone connected to a transmission line different from the control signal line to the control signal line at the gateway, and provides a main device for controlling the telephone such as a selection signal for the central office line. By providing notification, it is possible to control the status of multiple telephones without depending on the transmission path to which they are connected. In addition, by using a communication circuit that modulates and demodulates the voice calls of telephones that are connected to different transmission media such as paired lines and coaxial lines or paired lines and power lines, and by making it possible to set up multiple communication paths, various call controls are possible. It can be carried out.

Embodiment FIG. 1 is a diagram showing a configuration for realizing a bus-type connected telephone control system in an embodiment of the present invention. FIG. 2 is a diagram showing a communication sequence for controlling the bus-type connected telephone in FIG. 1.

In FIG. 1, 1 is a telephone line; 4, 5, and 6 are information signal circuits of a balanced bare cable used for transmitting digital information data, internal calls, and office line calls with the telephone line 1; 3;
is a control signal line for transmitting control information for controlling the exchange between the information signal lines 4, 5゜6 and the telephone line 1, controlling the office line to the telephone line 1, and controlling the state of the telephone set; , 5.6 and the control signal line 3 are each terminated by a terminator 7. 2 is the main device, which performs circuit switching between telephone port @1 and information signal lines 4, 5, and 6, incoming call detection for telephone line 1, outgoing/incoming call collision detection, polarity reversal detection, selection signal sending, DC loop closure, and control signal. It has built-in functions such as transmitting, receiving, and interpreting control information from line 3. 33 is a telephone connected to the control signal line 3 and information signal lines 4, 6.6 and can be controlled by control information transmitted and received with the main device 2, and a transceiver that transmits and receives control information with the control signal line. 13. A loop closure part 31 forming a DC loop in the exchange circuit 14. Consists of a transmitter/receiver unit 15 that enables handset calls such as a speaker and a microphone, and a CPU control unit 16 that performs manual key control of the telephone, state control, transmission/reception and interpretation of control information, switching circuit 14, and control of the transmitter/receiver 16. be done. 13 is information signal line 4, 6 such as coaxial or power line
6 and the control signal line 3 are transmission lines having different media, and 36 and 37 are connected to the transmission line 13 and are connected to the main device 2.
This is a telephone whose state is controlled by

22 and 27 are transceivers equipped with a driver and a receiver that transmit and receive control information transmitted using the transmission path 13 between the transmission path 13 and the CPU controllers 11 and 23;
It is. 20.26 and 1° are telephone calls that modulate and send the information signal when transmitting it to the transmission path 13, and demodulate the modulated and transmitted information signal when receiving it from the transmission path 13. It is a circuit and the up and down are also 2
It has a pair of communication paths. 21 and 26 are telephones 36°3
7 communication circuit 20. Exchange circuit for selectively exchanging 25, 24
and 29, a transmitting/receiving unit including a speaker and a microphone, which enable handset communication; and 23 and 28, a telephone 36.
Transceiver 22.2 with CPU control unit 23° 28 of 37
7 and controls the exchange circuit 21.26, the transmitting/receiving section 24.29, and the telephone communication circuit 20.25. 3
2 is an information signal and control information transmitted on any one of the information signal lines 4, 5.6 and each line of the control signal line 3, control information transmitted on the transmission line 13, and an information signal modulated and transmitted. It is a gateway that performs relay transmission with. Reference numeral 8 indicates a driver and receiver for transmitting and receiving signals to and from the control signal line 3. A transceiver 112 constitutes a driver and receiver for transmitting and receiving data to and from the transmission line 13. Reference numeral 9 indicates an information signal port m.
a,ts.

6, a switching circuit 30 connects the telephone line and the information signal line by exchanging the main device 2 and connecting them by further exchanging the exchange circuit 9, thereby forming a DC loop for the central office line by transformer coupling. closure,
Reference numeral 11 denotes a CPU control unit that controls the communication circuit 10 and the exchange circuit 9, performs control information transmission/reception processing with the transceiver 8, management of communication path usage status, and transmission protocol conversion such as the transmission format of control information.

Next, a series of processes with the above configuration will be described.

In the system configuration shown in FIG. 1, when the telephone 37 makes a call to the central telephone line 1, control information is transmitted and received between the CPU control unit 28 and the main device 2 via the gateway 32, thereby transmitting and receiving information signals. Performs transmission path conversion control and communication path control. In this case, the communication sequence of control information between the telephone 37 and the gateway 32, the gateway 32 and the main device 2, and the telephone 37. gateway 3
2 The processing contents of the main device 2 are shown in FIG.

The telephone control procedure will be described below according to the communication sequence shown in FIG. When the telephone 37 detects off-hook in the CPU control unit 28, the CPU control unit 28 uses a predefined command indicating off-hook to convert the control information into a predefined signal format, and then transmits it via the transceiver 27. Route 13. The signal format used at this time is common to both the transmission line 13 and the control signal line 3, and the format is shown in FIG. C in Figure 3
Commands such as the off-hook command are stored in the MD 43 and transmitted and received as control information. 38 and 39 are a priority and a source address for controlling contention in the case of a collision in C3MA/CD, etc. of control information, 40 is a control information destination address, 41 is a control code indicating a command definition classification, etc.; is a byte counter indicating the data byte length of CMD 43, and 44 is an error control code used to control errors in control information. When transmitting to the transmission line 13 via the transceiver 27, the gateway 32 sends the destination address using the address of the gateway 32, and the gateway 32 that receives the control information identifies that it is a telephone control command and then transmits it to the other party. The CPU controller performs protocol conversion on the control signal line 3, which is a transmission path, and sends the signal to the main device 2 via the transceiver 8, thereby notifying the off-hook. At this time, the CPU
The control unit 11 performs speed conversion processing in addition to protocol conversion if necessary. When the main device 2 receives off-hook from the telephone 37 as control information from the control signal line, the main device 2 performs internal telephone state control. After activation, control information is transmitted and received between the telephone 37 and the main device 2 via the gateway 32, thereby controlling the state transition of the telephone 37 managed by the main device 2. Next, the CP of telephone 37
The central office line N0 selected as the telephone line designation command indicates that the central office line selection is input by pressing the key of the U control unit 28.
(LN○) is added as an operand next to the command to generate a control information transmission formant, and then the main device 2
Notify. As shown in FIG. 2, when the main device 2 receives a telephone line designation after going off-hook, it checks the usage status of the office line (telephone line) and information signal line managed by the main device and determines the operand of the telephone line designation. If the selected central office line is not in use and any one of the arbitrary information signal lines is unused, the main device 2 relays the gateway 32 and transmits permission to use the central office line to the telephone 37 as control information. do. The telephone that has received the permission to use the central office line displays a message indicating that the central office line is in use. Furthermore, following the transmission of the command for permission to use the central office line, the main device 2 sends the line number of the unused information signal line (
JNO) to the telephone 37, a command for connecting the information signal line is appended with INO to the operand, relayed through the gateway 32, and sent to the telephone 37. After that, the telephone line 1 built in the main device 2 and the INO Turns on (closes) the conversion circuit of the information signal line corresponding to . At this time, when the gateway 32 receives the command for connecting the information signal line from the main device 2, it checks the usage status of the communication path used in the transmission path 13 of the gateway 32, that is, the uplink/downlink modulation frequency, and then makes two calls. The unused call modulation frequency channel number (FNO) of the channel is captured. gateway 32
captures the communication path to be used in the transmission path 13, and then selects the operand INo of the information signal line connection command of the switching circuit 9.
By turning on (closing) the cross point corresponding to , a DC loop is formed for the telephone line in the loop closing section 30 .

Furthermore, after turning on the carrier transmission of the telephone line 10FNO by the CPU control unit 11, the CPU control unit 11 of the gateway 32 sends a telephone line 37 a communication path connection command to notify the connection of the permitted communication path to FNO as an operand. Add and send. When the telephone 37 receives the command, the CPU control unit 28 controls the switching circuit 26 which connects the authorized communication path to the transmitting/receiving unit 29. Further, the CPU control unit controls the communication circuit 25 to turn on the designated communication path. In this state, the telephone 37 is physically connected to the telephone line 1, and a dial tone from the central office line can be heard from the transmitter/receiver section 29. Thereafter, when the dial number input from the key input section of the CPU control section 28 of the telephone 37 is relayed to the main device 2 via the gateway 32, the selection signal sending section built in the main device 2 sends the dial number to the telephone line 1. A selection signal is sent out.

As described above, it is possible to efficiently control telephones connected to a transmission path system different from that of the main device, such as making calls to a central office line.

Effect of the invention The present invention provides the following effects.

(1) By modulating and demodulating and transmitting information signals to different transmission lines using a gateway, it is possible to realize telephone calls connected to different transmission lines with a simple configuration. (2)
A telephone with a built-in communication circuit that has a modulation/demodulation section that is connected to a transmission line different from the information signal line is connected to the telephone line via the gateway and the information signal line, and the gateway closes the DC loop to the office line. This makes it possible to provide outgoing calls and incoming calls to a central office line that are equivalent to a telephone set connected to an information signal line. ■) The main device can process telephones connected to the information signal line and telephones connected to different transmission paths via a gateway with speech circuits as the same telephone without distinguishing between them. The internal processing of the main unit can be done easily.

However, the address assignment of telephones can be freely determined between telephones, and scalability is high.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a bus-type telephone control system according to an embodiment of the present invention, FIG. 2 is a diagram showing a communication sequence of the same system, and FIG. 3 is a diagram showing control information for transmitting the communication sequence of FIG. FIG. 4 is a diagram showing the configuration of a conventional path type connection telephone control system, and FIG. 5 is a diagram showing the communication sequence of the system. 1...Telephone line, 2...Main device, 3.
...Control signal line, 4-6...Information signal line, 32...Gateway, 33.36.3
7...Telephone. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure P Sue -- Briority δA --- Reckless L Address A ---, Aiyo Address Input

Claims (1)

[Claims] A main device that considers at least one information signal line for transmitting information signals and a control signal line for transmitting control signals as a logical connection unit and accommodates them as logical lines, and further accommodates at least one subscriber telephone line; A telephone connected to the logical line in a bus-like manner is controlled using a control signal line, and a telephone connected to a different transmission line system in a bus-like manner is provided with the same functions as the telephone connected to the logical line. preferably includes a gateway connecting the logical line and the different transmission line system for control from the main device, and performs line switching between the subscriber telephone line and the information signal line in the main device; The gateway has a loop closing part capable of forming a DC loop with respect to the information signal line connected to the main device, and a switching circuit for selectively exchanging the information signal line, and the gateway has a switching circuit for selectively exchanging the information signal line, A bus-type connected telephone device control characterized in that a telephone device connected in a bus-like manner to the gateway and the different transmission line systems is provided with a communication circuit having a built-in modulation/demodulation unit that modulates and demodulates the information signal transmitted to the gateway. system.