JPH0347638B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention uses an electronic control circuit such as a microcomputer,
This invention relates to a control system for a button telephone with fewer pairs of cable core wires.

(Prior art and its problems) Recent control systems for key telephone devices using microcomputers, etc. include a star-forming system configured to concentrate control on the main device as shown in Figure 1;
As shown in FIG. 2, there is a branch type system in which control is distributed to each functional unit.

Therefore, in the former type (hereinafter referred to as the centralized control type), the control circuit installed in the button telephones 1-1 to 1-n only performs the minimum conversion necessary for data transmission, such as parallel/serial conversion of data. No processing is performed, so-called raw data (unprocessed data)
In this method, the information is sent to the main device in the form of , and the main device processes it centrally. This method requires a large amount of data from each button telephone and a large processing capacity for the central control circuit 2 provided in the main device, which not only increases costs but also reduces and expands the system. The disadvantage was that it lacked flexibility.

In the latter type (hereinafter referred to as a distributed control type), control sections are distributed and arranged for each functional unit. In other words, each functional unit constituting the key telephone device, for example, a circuit for a key telephone lamp, a telephone key, etc., a central office line incoming call detection circuit, a call path switch circuit, etc. A control section consisting of a one-chip microcomputer, etc. is provided. In this method, when a task is executed to output data to the same unit as the data source, closed-loop processing is performed in the control unit located at the source regardless of data transmission. In the case of a task that spans multiple units, a method is used in which the source data is processed as a processor command, and then the command is transmitted via a transmission line to the control unit located in each of the target functional units, and the task is executed. It is. However, in this method, task execution is performed via a transmission line, and the program is as shown in Figure 5.
As shown in the example of transmission processing in the pattern shown in Figure 1, since it is a single-threaded process, it takes a lot of time to execute one task. Therefore,
Processing time increases in proportion to the size of the system, but in practice this processing time must be kept within 100 to 200 msec, and as a result, the data transmission speed and processing speed of the control unit must be increased. arise. This not only complicates the device and is disadvantageous in terms of quality and cost, but also poses a practical limit when increasing the size of the device.

(Objective of the Invention) The present invention solves the drawbacks of the prior art as described above, and increases the execution speed of all tasks by adopting an effective combination of distributed control and centralized control without complicating the device. The present invention provides a control method for a button telephone device that can be quickly controlled.

(Structure and operation of the invention) In order to achieve this object, a control method for a button telephone device according to the present invention transmits control signals between a plurality of telephones and a main device in a digital signal format to perform tasks necessary for the button telephone device. In a control method for a button telephone device that performs control for execution, each of the plurality of telephones is provided with a first control circuit group corresponding to each function of the telephone, and the main device is provided with a control circuit group of the main device. a second control circuit group provided corresponding to each function; a command buffer memory for temporarily storing command information between the first control circuit group and the second control circuit group; the first control circuit, comprising: a state monitoring memory that stores information for monitoring the state of the telephone; and a third control circuit that controls transmission of information between the two memories and the second control circuit group; Data between the control circuit group and the command buffer memory is transmitted and received by a required number of cables at predetermined timings, and control signals between the first control circuit group and the second control circuit group are transmitted and received using the command buffer memory. The command information is transmitted in an information signal format, and the command information is transmitted in the main device in order to temporally separate the processing in the main device of the command information of each of the plurality of telephones under the control of the third control circuit from the transmission and reception in the main device. The command information is temporarily stored in a command buffer memory, and the command information is executed by the third control circuit with reference to the contents of the command buffer memory, the contents of the status monitoring memory, and the contents of the second control circuit group. If the result of the suitability judgment is yes, the command information is distributed to the required control circuit and the command information is processed in parallel, and when the result is no, the command information is processed according to a predetermined procedure. By converting the command information into predetermined command information and processing it by the second control circuit group, control for executing the task necessary for the button telephone device is performed independently of the timing of transmission and reception of the command information. It is configured so that it can be done.

(Example) The present invention will be explained in detail below using the drawings.

FIG. 3 is a block diagram showing an example of a circuit configuration according to the present invention. In Figure 3, 1-1 and 1-n are key telephones, 2 is the main device, 3 is an interface circuit with the central office line, which is comprised of circuits for detecting incoming telephone signals and making dial calls, etc., and 4 is a telephone communication circuit. road switch circuit,
5 is a main device control circuit composed of a microcomputer, etc.; 6;
7 is a transmitter/receiver circuit for data transmission, 8 is a telephone control circuit consisting of a one-chip microcomputer, etc., 9 is a switch board for telephone keys, dial switches, etc., 10
is a display element such as a lamp, 11 is a communication circuit, 12,
13 is a cable for a data transmission path, 14 and 15 are cables for a communication path, and 16 is a ringer circuit.

The operation of the embodiment shown in FIG. 3 will be explained by taking incoming/responsive calls from a central office line as an example. When a call is received from the central office line, an output signal is sent from the central office line interface circuit 3 to the main unit control circuit 5, where data processing is performed and the main unit control circuit 5
The output signal is sent to the telephone control circuit 8 via the route [transmission/reception circuit 6→cable 12→transmission/reception circuit 7]. The control circuit 8 processes it, and the lamp 10
is turned on and the ringer circuit 16 is driven to display an incoming call.

When answering an incoming call using the button telephone 1-1, the telephone key 9 is pressed.
When you press , it is processed by the telephone control circuit 8,
One of the output signals turns on the lamp 10, and the other is sent to the main device control circuit 5 via the route [transmission/reception circuit 7→cable 12→transmission/reception circuit 6]. The main device control circuit 5 processes it, turns on the element a of the communication path switch circuit 4 with the output signal, and connects the office line 1 to the communication circuit 11 via the cable 14.
Connect to. With the above operations, it becomes possible to answer the call and make a call.

FIG. 4 shows an example of the configuration of the control system according to the present invention. Reference numerals 21, 22, and 23 indicate functional units disposed in the main device (for example, an incoming station signal detection circuit, a call switch circuit, a station line hold circuit, a dial signal origination circuit, etc.). 24 is a status monitoring memory, 25 is a command buffer memory, 20 is a control circuit, and the above is a main circuit. Implement it on the device. 26, 27 are data transmission paths, 28, 2
9, 30, 31, 32, and 33 are control circuits for each telephone.

Here, control signals from the telephone control circuits 28 to 33 to the command buffer memory 25 are converted into processor commands (eg, line connection request, line release request, line hold request, etc.) and sent. The command signals sent from each telephone control circuit 28 to 33 are temporarily stored in the command buffer memory 25. At this point, the transmission timing of the transmission path and the processing timing for subsequent control in the main device are temporally separated. Subsequently, the command information temporarily stored in the command buffer memory 25 is sent to the status monitoring memory 24, and compared with the contents, the control circuit 20 determines whether or not it is appropriate.If the command information is appropriate, the control circuit 21 requested by the command is Send the above command to ~23. When the control circuits 21 to 23 receive the command, they execute the command. Here, it is determined whether the command is appropriate or not, and if the command is not appropriate, the control circuit 20 processes the command according to a predetermined procedure.
For example, if the command is an extension call request and the called telephone is busy, the extension call request command is changed to a pidgey tone request and sent to the corresponding functional unit control circuits 21 to 23 to execute it. do.

The system is configured to execute the task of controlling the key telephone device through the series of operations described above. Here, each of the 20 to 25 units can be constructed as separate units, or the whole can be realized under storage program control on a microcomputer. Furthermore, it is actually effective to configure units 28 to 33 with one-chip microcontrollers.

In addition, although the transmission path is shown as two transmission paths 26 and 27 in FIG. 4, in the distributed control type, data transmission timing and command processing timing are not independent of each other, so a single transmission path is used. However, in the configuration of the present invention, commands are temporarily stored in a command buffer, and data is sent and received between the transmission path and the transmission path at a predetermined transmission timing. Since the data transmission timing is independent of the command processing timing, command input can be made from multiple distributed transmission paths, and this is an effective means for increasing the size of the system.

Pattern 2 in FIG. 5 is an example of a timing chart showing the relationship between transmission and control of the present invention. In Figure 5,
, , are the telephone control circuits 28, 29, 30
The processing time, . . . is the data transmission time from the telephone to the main device, . . is the processing time in the control circuit 20, .
8 to 30 processing times.

Here, the operation of central line acquisition will be explained as an example. Now, when one of the telephones presses the key switch to capture the central office line, according to pattern 1, →→
It works with the → route. In this case, it operates serially with respect to time. Next, if three telephones press the key switch at the same time or with a slight time difference, pattern 2 will occur. In this case, the processing is performed in an overlapping manner with respect to time. Here, the processing circuits of , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and each processing circuit are each constructed of a separate control circuit, and no commands are exchanged with other functional units, so that parallel processing is possible. Subsequently, the transmission of commands from the telephone to the main device is sent out serially according to the determined priority order, . The command sent above is input to the main device, and the following processing is performed. At this point, an overlap occurs, but it can be processed by temporarily storing it in the command buffer described above and processing it. Here, while operations such as turning on the communication path switch are performed as described above, the processed results are sent out in series from the main device to the telephone according to the determined priority order. This is received on each phone,
, and the output is used to perform operations such as lighting a lamp. At this time, processing is performed by separate control circuits, and commands are not sent or received with other functional units. As a result, overlap processing is possible.

(Effects of the Invention) As described above, in the present invention, only commands are transmitted serially, and the processing portions of each command can be overlapped, and furthermore, command transmission and command processing can be overlapped in time. This makes it possible to significantly shorten the processing time when call processing is congested as a button telephone device.

As explained above, the present invention makes use of the characteristics of the distributed control type while eliminating its drawbacks by separating the command processing time and command transmission time in the control unit by providing a command buffer memory and a status monitoring memory. As a result, the entire device is simplified, resulting in significant practical effects such as miniaturization, improved reliability, improved flexibility for scaling down and expanding, and cost reduction.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a conventional control circuit, FIG. 2 is a block diagram showing another example of a conventional control circuit, FIG. 3 is a block diagram showing a circuit configuration according to the present invention, and FIG. 4 is a block diagram showing another example of a conventional control circuit. FIG. 5 is a block diagram showing one embodiment of the control system, and is a time chart for explaining the operation of the present invention. 1-1 to 1-n...Telephone, 2...Main device, 3
... Interface circuit, 4 ... Call path switch circuit, 5 ... Main device control circuit, 6, 7 ... Transmission/reception circuit, 8 ... Telephone control circuit, 9 ... Switch board, 10 ... Display element (lamp) ), 11...
Call circuit, 12, 13, 14, 15... Cable, 16... Ringer circuit, 20, 21, 22, 2
3... Control circuit, 24... Condition monitoring memory, 25
...Command buffer memory, 26, 27...Data transmission line, 28, 29, 30, 31, 32, 3
3...Control circuit.

Claims (1)

[Scope of Claims] 1. A control method for a button telephone device that transmits control signals between a plurality of telephones and a main device in a digital signal format and performs control for executing tasks necessary for the button telephone device, comprising: Each of the telephones is provided with a first control circuit group corresponding to each function of the telephone, and the main device is provided with a second control circuit group provided corresponding to each function of the main device; a command buffer memory that temporarily stores command information between the first control circuit group and the second control circuit group; and a status monitoring memory that stores information for status monitoring of the plurality of telephones; and a third control circuit that controls the transmission of information between the memory and the second control circuit group, and the data between the first control circuit group and the command buffer memory is predetermined by a required number of cables. control signals between the first control circuit group and the second control circuit group are transmitted in a command information signal format; The command information is temporarily stored in the command buffer memory in order to temporally separate the processing in the main device of the command information of each telephone from the transmission and reception in the main device, and the command information is temporarily stored in the command buffer memory, and the contents of the command buffer memory and the If the result of the suitability judgment of the command information by the third control circuit, which is performed by referring to the contents of the status monitoring memory and the contents of the second control circuit group, is OK, the control requested by the command information is performed. The command information is distributed to circuits and processed in parallel, and if the result is negative, the command information is converted into predetermined command information according to a predetermined procedure and processed by the second control circuit group. A control method for a button telephone device, characterized in that the key telephone device is configured such that control for executing the tasks necessary for the button telephone device can be performed independently of the timing of transmission and reception of the command information. .