JPS5857888A - Channel controlling system of button telephone set - Google Patents

Abstract

PURPOSE:To simplify the program architecture and to make the manufacturing easy, by assigning an exclusive small-sized processor to each of a main trunk circuit, an extension telephone set circuit and a channel switch. CONSTITUTION:For example, an incoming call is given to a main trunk, a main trunk circuit 1 is operative, this state change is read by a processor 10 and an incoming call display signal is transmitted to a processor 12. The processor 12 drives a ring circuit of an extension telephone set and detects the response of the extension telephone set and transmits the connection request to the main trunk to the processor 10. The processor 10 receives a connection request signal, refeferences the managing data of the main trunk and transmits a connection permitting signal to the processor 12 transmitting the connecting request. The processor 12 receives the connection permitting signal and makes the corresponding main trunk lamp busy. Further, this permission signal is also received at a channel switch controlling processor 11, which detects the address of the signal and the allocating location of the extension and main trunk and closes an objective cross point.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling a communication path switch in a button/telephone device under program control.

In general, in an electronic button telephone device that is controlled by a stored program, each part of the device is operated according to the results of the logical operations of the program, so that detailed services can be provided relatively easily. For example, without pressing the line selection button (just by off-hook operation, services that continue to idle call 11 * and services that restrict long-distance calls, etc.) can be programmed by two people without additional hardware. You can feel refreshed just by doing this.

FIG. 1 is a block diagram showing an example of the configuration of a conventional electronic button telephone device.

~α-tele is Buttonden i! A pair of office lines led into the I equipment, 1 is the office line circuit, 2 is the communication path switch, 3 is the internal telephone circuit, 口 is the control processor, γ is the control circuit for the internal telephone system, 4 %9 is the input/output port for controlling the central office line circuit, S is the output port for controlling the communication path switch, and %9 is the input/output port used for data transmission and reception with the control circuit 7 of the extension telephone circuit. ? There is a memory size used in 8.

The control processor t8 centrally manages and controls the entire device, has relatively high processing power, and has a large usable memory capacity.

Such conventional electronic button telephone devices have the advantage that the entire device can be controlled with a single processor, but such processors require external memory and an input/output board, which makes them difficult to use when the device is small. It was a disadvantage. Furthermore, information from a large number of input points must be scanned without being overlooked, logical operations must be performed on the input information within a limited time, and the drive output of the device must be executed by a single processor.

For this reason, processing i8! It becomes necessary to use so-called multi-processing that divides the program into small pieces and makes frequent use of time interrupts, making the program structure complicated and manufacturing difficult.

In order to eliminate these shortcomings in the prior art, the present invention allocates a dedicated small processor to each of the office line circuit, extension telephone circuit, and call path switch, thereby distributing the load and creating a data path between the processors. The communication path switch is driven based on the result of the transmission and reception of signals between the processors, and Figure mK will be explained below.

FIG. 2 is a block diagram showing one embodiment of the present invention,
In the figure, C01 to CO0 are the central office lines connected to the key telephone device, 1 is the central office line circuit, 10 is the processor that controls the central office line circuit 1, 2 is the communication path switch, and 11 is the communication path switch 2. 3 is an extension telephone circuit; 12 is a processor for controlling the extension telephone circuit 3;
13 is the serial data linking each processor.
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The processor 12 scans the state of the extension telephone circuit 3;
When a change is detected, the programmed hand 1 [K therefore,
Drives the extension telephone circuit 3. If the process cannot be completed by only driving the extension telephone circuit 3, that is, if the processing content needs to be changed depending on the state of the office line circuit 1, or if the office line circuit 1 must be driven, the extension telephone circuit control Data is sent from the processor 12 to the office line circuit control processor 10 via the data bus 13. Processor 10 uses this data as input information to drive one station 11 circuit 1 or sends data back to processor 12 according to a programmed procedure. The office line circuit control processor 10 also scans the state of the office line circuit 1, and when a change is detected, drives the office line circuit 1 or sends data to the processor 12 according to a programmed procedure. Using this data as input information, the processor 12 drives the telephone circuit 3 or sends the data back to the processor IO according to a programmed procedure. Communication path switch tlJ
The IR processor 11 receives the data transmitted and received by the processors 12 and 10 in parallel, and uses this data to determine the accommodation position of the central office line and the telephone in the communication path switch, and to switch between the central office line and the telephone as necessary. Open and close communication path crosspoints between

The role of each processor will be specifically described using an example in which a call is received from a central office line and is answered using an extension telephone. Figure K3 is an explanatory diagram showing an example of the signal procedure to be sent and received at the thresholds of the central office line circuit control processor 10, the extension telephone circuit control processor 121, and the communication path switch control processor 11. The signal flows in the direction of the arrow. Indicates that the signal is received by the processor indicated by ◎ When there is an incoming call on the office line, the office line circuit l operates, the processor 10 reads this state change, and sets the management data of the office line as incoming call ringing, An incoming call display signal is sent to all processors 12. The processor 12 causes the roaring central office line lamp (not shown) to ring for an incoming call, and if the central office line is designated to ring, drives the ringing circuit of the extension telephone to ring for an incoming call. When a response operation is performed on the extension telephone, the processor 12 detects this and sends a connection request to the central office line to the processor 10. The processor 10 receives the connection request signal, refers to the management data of the central office line, and checks whether another telephone extension has already been operated to answer.
If it is the first response, the management data is determined to be in use and a connection permission signal is sent to the processor 12 that issued the connection request.

The processor 12 receives the connection permission signal and puts the #authority line lamp in use. The connection permission signal is also received by the communication path switch f control processor 11, which learns the accommodation location of the extension telephone from the destination of the signal, learns the accommodation location of the extension telephone from the office line number information in the signal, and sends the call to the driving line. Close the switch, close the desired crosspoint, and connect the central office line and extension telephone.

When the call ends and the handset is put down, the processor 12 detects this, turns off the office line lamp that has been in use, and sends a call end signal to the processor 110.

The processor 10 receives the call termination signal, returns the management data of the j6 edge to empty, prepares it for use in the next call, and initializes the office line circuit 1 to detect the arrival of an office line call. The call termination signal is also received by the communication path switch control processor 11,
The location of the central office line is known from the station M number information in the signal, the location of the extension telephone is known from the source of the signal, the communication path switch is activated, and the previously closed crosspoint is opened to connect to the central office line. Disconnect from the extension phone.

In the above description, the station line circuit control processor 10
Although each of the communication path switch control processors 11 has been described as being one processor, it is also possible to distribute the load to a plurality of processors due to an increase in the amount of load or an increase in the number of circuits to be controlled.

As explained above, to control the communication path of a key telephone, a dedicated processor is installed for this purpose, and the signals sent and received by the processor for controlling the telephone and the processor for controlling the office line are simultaneously received, and these signals are converted into logic. It is possible by judgment. Since the processor for controlling the communication path switch has a communication path control function, the required processing power of the processor for controlling the central office line circuit is reduced, and all processors are integrated into an inexpensive single chip that also incorporates the communication port control function. It becomes possible to use the output processor. Furthermore, if you adopt a method of adding processors for channel switch control according to the scale,
Control system costs can be made commensurate with the scale. Further, since the load is distributed to a plurality of processors, the processing amount of each processor is reduced, and there is no need to adopt a complicated multiprocessing configuration as a program configuration, which facilitates manufacturing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the configuration of a conventional key telephone device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing an example of a signal transmission/reception procedure in the present invention,
It is. Description of symbols 1... Office line circuit, 2... Call path switch, 3... Extension telephone circuit, 4, 5.6...
...Input/output control board, 7...Control circuit, 8
, 10, 11, 12... Processor, 9...
...Memory, 13...Databus Agent Patent Attorney Akio Namiki Agent Patent Attorney Kiyoshi Matsuzaki @IJ' Figure 2

Claims (1)

[Claims] 1) - Or a button telephone comprising a station m circuit accommodating a plurality of office lines, a telephone short circuit accommodating a plurality of telephones, and a communication path switch connecting between the office line circuit and the telephone circuit. In the equipment, a dedicated control processor is provided for each of the office line circuit, telephone set circuit, and call path switch, and the processors are connected by a common data path. The data is transferred between the telephone controller and the telephone circuit control processor.
A communication path control system for a button/telephone device, characterized in that data sent and received via a path is received in parallel, and a communication path switch is controlled to open and close based on the data.