JPH0813059B2 - Telephone switching equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telephone exchange device that forms a communication path between an outside line and an extension line telephone.

[Prior Art] In a conventional key telephone device, when an incoming call to a line to be accommodated is detected, a ring tone circuit is activated to send a ring tone to a telephone. This is done by controlling the timing within the ring tone circuit.

[Problems to be Solved by the Invention] However, according to the conventional technique, a dedicated timing circuit is required to perform the intermittent control of the ringing tone. Also, when the equipment is connected to a private branch exchange (hereinafter referred to as PBX) or a building telephone extension, incoming calls to the line accommodated by the equipment include incoming calls from outside lines and incoming calls from the PBX or building telephone extension. There is. To enable the operator to distinguish between the several types of incoming calls,
There is a problem that the same number of timing circuits as the types of lines are required, and an extremely complicated circuit is required to support various PBXs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a telephone exchange device capable of notifying the type of incoming line with a simple configuration.

[Means for Solving the Problems] In order to achieve the above object, the telephone exchange apparatus of the present invention has the following configuration.

That is, switch network means for forming a communication path between an outside line and an extension telephone, a detection means for detecting an incoming signal from an outside line, a ringing tone generating means connected to the switching network means, and a ringing tone generation. Control means for controlling the switch network means so that the ringing tone generated by the means is intermittently output in synchronization with the intermittent detection of the incoming signal by the detecting means to the extension telephone.

[Operation] In such a configuration, when an incoming call signal from an outside line is detected, a ringing tone is intermittently output in synchronization with the detection of the incoming call signal and is output to the extension line telephone. To control the switch network means constituting the.

[Embodiment] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

<Description of Configuration (FIG. 1)> FIG. 1 is a configuration diagram of a button telephone device according to an embodiment of the present invention, in which 1 is a main device of the button telephone device and 2 is a control of the entire main device. A central processing unit (hereinafter abbreviated as CPU) 3 is a central line 7 and a telephone 8 and a sound source 6 according to an instruction from the CPU 2.
A switch network which forms a communication path between the telephone 8 and the telephone 8, 4 detects an incoming signal from the line and transmits a dial signal, and 5 transmits and receives a control signal to and from the telephone 8. Telephone interface, 6 is a sound source that emits various ringing sounds, 7 is an office line, 8 is a telephone,
9 indicates that the line interface unit 4 changes the presence or absence of an incoming signal.
An interrupt signal line for notifying the CPU 2 and a signal line 10 for connecting the line interface unit 4 and the CPU 2 port.

<Explanation of Operation (FIG. 2)> FIG. 2 is a time chart showing the operation in this embodiment, and the operation when an incoming call arrives at the station line 7 will be described below.

As shown in the figure, when there is an incoming call on the office line 7, the incoming line signal is detected by the line interface unit 4, and the CPU 2 sends the signal line 9
An interrupt signal is output from the interface unit 4 via the.
On the other hand, the CPU 2 which has received the interrupt signal issues a connection instruction to the switch network 3 in order to establish a call between the incoming sound source 6 and the telephone 8. Also, when the incoming signal disappears, the line interface unit 4 sends an interrupt signal to the CP.
Output to U2. And CPU2 is switch network work 3
Is instructed to open the incoming sound source 6 and the telephone 8.

The above operation is repeated until the telephone 8 responds to the incoming call or the line interface unit 4 does not detect the incoming signal for a predetermined time or longer.

<Explanation of Processing Procedure (FIG. 3)> Next, the processing of the CPU 2 which receives the interrupt signal from the line interface unit 4 will be described below in accordance with the flow chart shown in FIG.

First, in step S1, when an interrupt signal is input,
The incoming signal state of the line interface unit 4 is read through the signal line 10, and at step S2, it is determined whether or not the incoming signal is currently present. If yes, the process proceeds to step S3, and this interrupt processing is performed. Is the first interrupt.
If the interrupt is not the first interrupt, the process proceeds to step S5 without executing the process of step S4. On the other hand, in the case of the first interruption, the telephone interface unit 5 is controlled so that the telephone 8 displays an incoming call (lamp or the like) other than the sound at step S4. Next, in step S5, the switch network 3 is controlled to connect the incoming sound source 6 and the telephone 8.

When the incoming signal is not received in the determination of step S2, the process proceeds to step S6 to instruct the switch network 3 to disconnect the incoming sound source 6 and the telephone 8.

As is clear from the above description, the telephone 8 in this embodiment sounds in synchronization with the "interruption of the sound source" executed by the interrupt process of the CPU 2 in response to the interruption of the incoming signal.

In the present embodiment, only the incoming call display sound sent to the telephone set 8 is synchronized with the incoming call signal, but other than the sound, for example, the lamp display is also turned on / off in synchronization with the intermittent incoming call signal. You may

According to this embodiment, the change in the presence or absence of the incoming signal from the line interface unit is notified to the central processing unit as an interrupt signal, and the incoming call display is turned ON / OFF accordingly. There is an effect that a special timing circuit is not required for the intermittent control of the incoming call indication sound, and an incoming signal with a complicated intermittent cycle can be displayed without the need for a discrimination circuit.

[Effects of the Invention] As described above, according to the present invention, it is possible to simplify the configuration for interrupting the notification of the incoming call in the pattern according to the type of the incoming signal from the outside line.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention, FIG. 2 is an operation time chart in this embodiment, and FIG. 3 is a flow chart of an interrupt processing procedure in this embodiment. In the figure, 1 ... Main device, 2 ... CPU, 3 ... Switch network, 4 ... Line interface, 5 ... Telephone interface, 6 ... Sound source, 7 ... Station line, 8 ... Telephone , 9 ... Interrupt signal lines.

Claims (1)

[Claims] 1. A switch network means for forming a communication path between an outside line and an extension telephone, a detecting means for detecting an incoming signal from an outside line, a ringing tone generating means connected to the switch network means, Control means for controlling the switch network means so that the ringing tone generated by the ringing tone generating means is intermittently output to the extension telephone in synchronization with the intermittent detection of the incoming signal by the detecting means. Characteristic telephone exchange device.