JP2863589B2 - Terminal ringing sound synchronization control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to an automatic telephone exchange system, which synchronizes the ringing sound of each terminal device when a plurality of terminal devices are called simultaneously or substantially simultaneously. The control method to be performed.

[Conventional technology]

In a terminal device such as a so-called multifunctional telephone in a conventional automatic telephone switching system, when there is an incoming call, the terminal device itself starts counting clocks and the like built in from the time when the incoming call is notified from the switching device, For example, the incoming ringer is sounded at a cycle such as 1 second sound and 2 second stop.

Also, in the case of a two-wire telephone such as a rotary dial type or a push button signal dial type, the exchange itself ticks the ringing signal, which has had a significant effect on the processing capacity of the central control unit. As described above, in a multi-function telephone of, for example, a 4-wire type in which the communication line and the data line are separated, the switching device notifies the start and stop of the incoming call and causes the terminal device to sound the incoming call sound. In terms of being able to
It can be said that it greatly contributes to the improvement of the processing capacity of the central control unit.

[Problems to be solved by the invention]

However, on the other hand, there were the following disadvantages. That is, since each terminal device itself counts a clock in order to determine a ringing / stopping interval period, the ringing / stopping period is shifted between the terminal devices. FIG. 13 shows an example. It is assumed that there are two types of interval periods of the incoming call sound: 1-second ringing at the time of extension incoming call, 1-second stop, and 1-second sounding at the time of external line incoming call and 2-second stop. Then, it is assumed that the internal ringing tone has a higher priority to ring than the external ringing tone. For example, under this condition, if there is an extension incoming call on the terminal device 1, abandoned in the middle at 2.5 seconds, and received an external call simultaneously on the terminal devices 1 and 2 at 0.5 seconds, As shown in the figure, the ringing tone of the terminal device 1 is an extension ringing tone from 0 to 2.5 seconds,
External ringing starts at 2.5 seconds. On the other hand, since the terminal apparatus 2 has started the external ringing tone from the time point of 0.5 seconds, the terminal apparatuses 1 and 2 do not match the period of the ringing tone even though the external apparatuses have simultaneously received the external line. As a method to solve this problem, even when the extension ringing tone is sounding, prepare a clock counter for determining the interval dedicated to the outside ringing tone, start counting from the time when the outside line is ringing, and start counting at the time of 2.5 seconds. Therefore, it is possible to make the outside-line ringing tone sound according to the above. However, as in the example of the terminal device 3 in FIG. Absent.

In a system in which a large number of multifunctional telephone terminals are installed, if a large number of incoming calls occur frequently, the above-mentioned out-of-synchronization of the incoming calls may cause almost no time during which the incoming calls are stopped, Often it was very harsh.

As described above, in the conventional terminal ringing method of the automatic telephone exchange system, since each terminal device determines the interval period of the ringing sound by its own clock count,
When a plurality of different incoming calls are received, or when incoming calls from the switching device are shifted, the ringing tone ringing cycle of each terminal device does not match, which has a drawback that it is very annoying.

SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal ringing sound synchronization control method which eliminates the above drawbacks, synchronizes the ringing sound ringing periods of all terminal devices, and does not reduce the processing capability of the switching device. is there.

[Means for solving the problem]

The present invention relates to an automatic telephone switching system that causes a plurality of terminal devices to emit a ringing sound of a call, wherein the switching device periodically updates a synchronization counter and transmits the synchronization counter to the plurality of terminal devices, and each terminal device receives a call. When there is, the sounding or stopping of the incoming call sound is determined based on the value of the synchronization counter.

[Action]

The switching device periodically updates the synchronization counter and transmits the counter value to all terminal devices. The terminal device stores the counter value. When an incoming call occurs and ends, the switching device notifies the terminal device of only the start and stop of the incoming call. The terminal device determines whether or not the incoming call ringing operation is stopped at the present time indicated by the synchronous counter, and controls the incoming call ringer. Since each terminal device stores the same counter value,
The ringing sound of each terminal device is synchronized.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram in which terminal devices 1 to n are connected to the switching device. The switching device 10 describes a processor 11 for executing processing for realizing the present invention and the processing shown in FIG. A memory 12 is provided for temporarily storing data such as an instruction group and a synchronous counter for cyclically updating values from 0 to 11 shown in FIG. On the other hand, the terminal device 20 comprises a processor 21 for controlling the entire terminal device, an instruction group describing the processing shown in FIGS. 7 to 9, and various temporary data and synchronization counter values shown in FIG. A memory 22 for storing ringing pattern data and the like shown in FIG. 5 for causing the ringer to ring in the pattern shown in FIG.
It has.

A data line 30 is provided between the switching device 10 and each terminal device 20 in addition to a communication line (not shown), and synchronization information, incoming call information, and the like shown in FIG. 3 are transmitted from the switching device to the terminal device. . At the top of each information, an information identifier for identifying various information (not shown), for example, call information, response information, lamp information, disconnection information, and the like is assigned. The synchronization information conveys the counter value from 0 to 11 as described above.
An incoming call type for identifying whether the call is an internal call or an external call,
A control type for discriminating whether the incoming call is started (ON) or the incoming call is stopped (OFF) is transmitted.

With reference to the above-mentioned drawings, a description will be given of ringing of a ringing tone according to the present invention when the incoming call situation is the same as that of the conventional example shown in FIG.

First, the switching device 10 updates the synchronous counter table CNTX (FIG. 12) in the memory 12 in the range of 0 to 11 at a period of 500 ms as shown in FIG. 11 (FIG. 11, steps 1201 to 120).
3) Edit as synchronization information (Fig. 11, steps 1204, 12)
05), and transmits to all terminal devices (FIG. 11, step 120).
6). The terminal device 20, as shown in FIG.
When the synchronization information is received from the terminal 22, it is temporarily stored in the counter table CNT of the terminal device itself in the memory 22 shown in FIG. 10 (FIG. 8, step 901). In this way, each terminal device receives the synchronization counter value from the switching device every 500 ms and always keeps its own counter table CNT up to date.

Here, as shown in FIG. 1, when the value of cnt is '0',
When there is an incoming call to the terminal device 1, the terminal device 1 performs control according to the flowchart shown in FIG. First, an incoming call type is determined (FIG. 7, step 801), and after a control type determination for an extension incoming call (FIG. 7, step 802), an incoming call determination in the memory 22 shown in FIG. 10 is performed. '1' is stored in the application table NT (step 803 in FIG. 7). At this time, the cnt value is '0'
(Step 804 in FIG. 7), the call information receiving process ends.

Further, in the terminal device 2, the ring tone control program shown in FIG. 9 operates at a period of 100 ms. First, it is determined whether there is an internal call or an external call (step 1001 in FIG. 9). Since there is an internal call, a table PR indicating whether or not there is pre-ringing control in the memory 22 is provided. (Step 1002 in FIG. 9), otherwise, it is determined that the call is an extension incoming call (Step 1003 in FIG. 9). Table cnt = 0
(Step 1004 in FIG. 9), an incoming ringer ON order is sent out and sounded (step 10 in FIG. 9).
05). When the table cnt of the terminal device 1 is 1, it is determined that there is an incoming call to the outside line, and in FIG.
805 is executed, and "1" is stored in the external line incoming call determination table GT in the memory 22 shown in FIG. 10 (step 80 in FIG. 7).
6). At this time, if it is determined that the cnt value is “1” (the seventh
(FIG., Step 807), the incoming call information receiving process ends. On the other hand, the ringing tone control program that operates every 100 ms (No. 9
In the figure, it is determined in steps 1001 and 1002 whether an extension is being received. If it is determined that the extension is still being called, the ringing of the incoming call is maintained in steps 1003, 1004, and 1005. Table cnt = 2
Then, in accordance with the ringing pattern data shown in FIG. 5, the ringer ringing stops in the processing of steps 1004 and 1006 in FIG. With the above operation, the terminal device 1 continues to ring the extension incoming call, and upon receiving the stop of the extension incoming call from the exchange at the time of the table cnt = 5, step 808 in FIG.
Is stored in the extension incoming call determination table NT. Thus, the ringing tone control program (FIG. 9)
Performs processing in the route of steps 1001, 1002, 1003, 1007, and 1008, and stops the incoming ringer. Similarly, the table
When cnt = 6, processing is performed along the route from step 1007 to 1009 to ring the incoming ringer. Thereafter, sounding and stopping are repeated according to the ringing pattern shown in FIG. 1 until a response is made.

On the other hand, when the table cnt = 1, the terminal device 2 receives an incoming call from the outside line, so that the incoming call ringer rings only during the table cnt = 1, stops during the table cnt = 2 to 5, and stops the table cnt.
The ringing pattern that rings again at nt = 6 to 7 is repeated, and the table cnt = 6 and thereafter is synchronized with the terminal device 1.

Also, when an external call is received when the table cnt = 4 as in the terminal device 3, the snap 81 is performed via steps 801 → 805 → 806 → 807 in the flowchart shown in FIG.
In the process of 0, “2” is stored in the pre-ringing control table PR shown in FIG. Ringing tone control program (9th
FIG. 9) determines the value of the table pr through steps 1001 and 1002 (FIG. 9, step 1010), and in the case of '2', sends an incoming ringer ON order to ring (FIG. 9). , Step 1011), and store “1” in the table PR (step ninth).
(Figure, 1012). Also, in the operation cycle after the next 100 ms,
Since the result table pr = 1 of the judgment in step 1010,
'0' is stored in the table PR (Fig. 9, snap 1013),
The incoming ringer stops in the processing of steps 1003 → 1007 → 1008. This pre-ringing control is to make the incoming ringer ring for a short time when there is an incoming call during the incoming ringer stop period of 2 seconds, and to notify the unattended person of the incoming call before the regular ringing period. Do. In this manner, the terminal device 3 is synchronized with the terminal devices 1 and 2 after the table cnt = 6 as shown in FIG.

In this embodiment, the processing when a plurality of calls of the same type are received by the same terminal device is not particularly mentioned since it can be realized by a normal program processing, that is, by providing an incoming call counter and the like and adding / subtracting the same. Did not.

Further, in this embodiment, as shown in FIG. 5, two types of calls, ie, an internal call and an external call, have been described. However, other call types, such as a dedicated line call, and external lines are grouped. Of course, it is also possible to change the ringing pattern for each group. Although the sound type is not particularly mentioned, it goes without saying that the present invention is also effective for a terminal device that identifies a call by combining a ringing pattern and various sound types. Even if such a complicated incoming call identification is realized, the processor of the switching device simply transmits the synchronization information to all the terminal devices, so that the processing capability is not reduced. In addition, communication of information,
It is also possible to use the normal data line or the data channel if the communication and data are time-division multiplexed, and the switching equipment and terminal equipment add simple programs and data. Therefore, it can be realized without losing economic efficiency.

Further, in the present embodiment, the example in which the switching device transmits the same synchronization counter value to all terminal devices has been described.For example, terminal devices are grouped, and the counter value is shifted between the groups and transmitted. Conversely, it is also possible to positively shift the ringing period by changing the ringing pattern data stored on the terminal device side for each terminal device or each group.

As described above, in the present embodiment, each terminal device controls the incoming ringer in accordance with the synchronization counter value managed by the switching device, so that a plurality of terminal devices receiving the incoming call synchronize the incoming ringer. This makes it possible to prevent the ringing of each terminal device from ringing and disturbing the atmosphere of an office or the like.

〔The invention's effect〕

According to the present invention, the ringing of the incoming ringer between the terminal devices can be synchronized without lowering the processing capacity of the switching device and without impairing the economy as an automatic telephone switching system. The displacement can be removed, the atmosphere of the office or the like is not disturbed, and the unpleasant person or the like is not discomforted.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a ringing pattern according to the present invention. FIG. 2 is a block diagram showing a connection state and a configuration of a switching device and a terminal device. FIG. 3 is a diagram showing a configuration of synchronization information. FIG. 4 is a diagram showing the structure of incoming call information. FIG. 5 is a diagram showing ringing pattern data. FIG. 6 is a pattern diagram showing the ringing pattern data of FIG. 5 on a time axis. FIG. 7 is a flowchart of an incoming call information receiving program of the terminal device. FIG. 8 is a flowchart of a synchronization information receiving program of the terminal device. FIG. 9 is a flowchart of a ring tone control program of the terminal device. FIG. 10 is a diagram showing a table in the terminal device. FIG. 11 is a flowchart of a synchronization information transmission program of the switching device. FIG. 12 is a diagram showing a table in the exchange device. FIG. 13 is a diagram showing an example of a conventional ringing pattern. 10 ... exchange device, 11 ... exchange device processor, 12 ... exchange device memory, 20 ... terminal device, 21 ... terminal device processor, 22 ... terminal device memory, 23 ... terminal device Incoming ringer, 30 …… Data line

Claims (1)

(57) [Claims] An automatic telephone switching system having a plurality of terminal devices and a switching device for accommodating the terminal devices, wherein the automatic ringing sound is generated by the plurality of terminal devices. A synchronization information transmitting means for updating a count value in a predetermined range and transmitting synchronization information including the count value to all of the plurality of terminal devices; and, when an incoming call occurs, transmitting the incoming call information to the terminal device. A ringing unit that outputs a ringing sound to each of the plurality of terminal devices; a synchronization information receiving unit that receives the synchronization information; and a synchronization information receiving unit that includes the synchronization information. A counter table that stores the count value, and a pattern table that stores ringing control data for ringing or stopping the ringing sound output from the ringing means corresponding to the count value,
A pattern table in which the same ring control data as in all the other terminal devices is set, a call information receiving means for receiving the call information, and a call received by the ring means by recognizing the reception of the call information. Ringing control means for generating a ringing sound, wherein the control unit periodically reads the count value stored in the counter table, and refers to the pattern table to receive ringing control data corresponding to the read count value. Ringing control means for determining whether to indicate a ringing sound or indicating a stop of the ringing sound, and controlling the ringing means in accordance with the determination result, wherein the plurality of terminal devices sound the ringing sound in synchronization with each other. A terminal incoming call ringing sound synchronous control system characterized in that: