JPS6339135B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a calling system for a telephone exchange.

In the conventional calling system, the exchange has an extension ring tone source with one extension ringing cycle and a central line ring tone source with one central line ringing cycle, and when the telephone receives a call from an extension, the extension ring tone source A calling signal was sent out, and when a call was received from the central office line, the calling signal was sent out from the central telephone ring sound source. With this system, control is simple, but instantaneous ringing is not possible, so even if a call is made, there is a time when a ringing signal is not sent, and when the extension subscriber picks up the receiver to make a call, the other party cannot be reached. It had the disadvantage of falling into the . In order to improve this drawback, the following methods have been considered.

This system has a ringing sound source with a plurality of ringing cycles as shown in FIG. 1 in the exchange, and when a call is received, the sound source with the closest cycle is selected and a ringing sound is sent out. This system does not essentially eliminate the above-mentioned drawbacks, and there is also a system that sends out a ringing tone at a constant cycle for each call. This method solves the shortcomings of instant recall. However, in the above two methods, ringing signals with different phases are sent out at the same time on floors where many telephones are installed, so the ringing signals are always sent out on the same floor, resulting in the ringing sound being interrupted. It has the disadvantage of being bothered by noise.

SUMMARY OF THE INVENTION An object of the present invention is to provide a calling method that eliminates the drawbacks of the conventional methods described above.

According to the present invention, while effectively performing instantaneous ringing, it is possible to reduce the noise caused by the ringing sound by providing a pause period during which no ringing tone is sent out even when many calls are made at once on a large floor or the like.

Examples of the present invention will be described in detail below.

FIG. 2 is a diagram for explaining the calling method of the present invention, where 2-1 and 2-2 show the phases of calls from extensions, and 2-3 shows an example of the phases of extension calls including instantaneous calls. 2-4 and 2-5 represent the phases of calls from the central office line, and 2-6 represents an example of the phase of central office line calls including instantaneous calls. That is, in this embodiment, it is possible to send a ringing tone having two different phases for the extension line and two different phases for the central line, and one cycle of these is time 0 to 7. . In addition, there is a common pause period at times 0 and 4 of each phase, during which no ringing tone (except for the instantaneous ringing tone described later) is supplied to any telephone.

FIG. 3 is a block diagram of the present invention, and 3-1 is a block diagram of the present invention.
cc system, 3-2 is a signal distribution device, 3-3 is a timing creation device, 3-4 is a 16kHz oscillator, 3-50 ~
3-5n represents a telephone, 3-60 to 3-6n a ringing tone sending device, and 3-70 to 3-7n a switch circuit. FIG. 4 shows the configuration of the ringing tone sending device in detail, 4-1 is a ringing tone sending request memory, 4-2 is an instantaneous ringing tone sending circuit, 4-3 is a ROM memory read control circuit,
4-4 is a ROM memory, 4-5 is a comparison circuit, 4-
6 shows an OR circuit that ORs the instantaneous ringing tone and the ringing tone of the selected phase.

In Figure 2, 2-1, 2-2, 2-4, 2
-5 is assumed to repeat the waveform shown at times 0 to 7. Figure 2-3 shows times 0, 1, 2,
This shows a case where a call from an extension occurs during the period 3.
Here, at timing a, there is a call request from the extension, and the instantaneous ringing tone sending circuit 4-2 first sends an instantaneous ringing tone for three hours from timing a. After that, two phases 2-1, 2-2 for extension
Among them, the phase 2-1 that is closer to the time when a call request is received is selected and a ring tone is repeatedly sent out. Furthermore, if a call is received from the extension during times 4, 5, 6, and 7, an instantaneous ringing tone is immediately sent from the instantaneous ringing tone sending circuit 4-2,
Thereafter, a phase 2-2 close to this call is selected and a ring tone is repeatedly sent out.

Similarly, in the case of a central line call, times 0, 1,
If the call comes in between times 2 and 3, phase 2-4 is selected, and if the call comes in between times 4, 5, 6, and 7, phase 2-5 is selected. Waveform 2-6 is time 4
2. After the instantaneous ringing circuit 4-2 sends out the instantaneous ringing tone for 3 hours from timing b, phase 2 is reached.
-5, the ring tone is being sent out.

By transmitting the ringing tone at such a cycle, the drawbacks of the conventional apparatus as described above can be eliminated.

The operation of FIG. 3 will be explained below.

When the cc system 3-1 issues a request to send a ring tone to the telephone 3-5 to receive a call, the cc system 3-1
sends a call request command in response to a call from an extension or a call from a central office line to the ring tone sending control device 3-60 via the signal distribution device 3-2. In response to this command, the ringing tone sending control device 3-60 controls the instantaneous ringing, and after the instantaneous ringing is completed, the timing generation circuit 3-60 controls the instantaneous ringing.
-3 receives a timing signal and controls in which phase the ringing tone is sent out. The switch 3-7 is activated by the output of the ring tone sending control device 3-60.
By turning ON/OFF 0 and controlling the output of a 16kHz oscillator as a sound source, a specified waveform of a predetermined ringing tone is created.

The timing generation device 3-3 generates timing signals for controlling the various parts shown in FIG.
-3 and comparison circuit 4-5. In this embodiment, the time relationship of the signals indicating each number is as shown in FIG.
It's been longer than 5, 6, and 7. This time 0,
4 (pause period), the phase 2-
Although the patterns of 1, 2-2, 2-4, and 2-5 are determined, it goes without saying that each time may be at regular intervals.

FIG. 4 shows a block diagram of the ring tone sending control circuit 3-60. The ringing tone transmission request command from the cc system 3-1 is stored in the ringing tone transmission request memory 4-1 via the signal distribution device 3-2. This command is used by the instantaneous ringing tone sending circuit 4.
-2 and is supplied to the ROM memory read control circuit 4-3.

First, the instantaneous ring tone sending circuit 4-2 distinguishes from this command whether the call request is from an extension line or a call request from a central office line, and sends a switch control signal with a predetermined pattern for each via an OR circuit 4-6. and sends it to the switch circuit 3-70. For example, if the command is a request to ring an extension, if a pulse signal with a pulse width of a predetermined time after receiving the command is sent as a switch control signal, the instantaneous ring tone of the extension as shown in Figure 2 2-3 will be generated. . That is, the switch circuit 3-70 intermittents the output of the oscillator 3-6 in accordance with this switch control signal and sends it to the telephone 3-50.

Also, if the command is a call request for a central office line,
Similarly, a predetermined pulse signal may be sent. In this case, the bell sound is made to be different from that for the extension line, and the waveform is made to be different from that for the extension line, for example, as shown in FIG. 2 2-6.

After the transmission of the instantaneous ringing tone is completed in this way, the instantaneous ringing tone transmission circuit 4-
2 supplies a transmission completion signal to the ROM memory read control circuit 4-3.

On the other hand, the ROM memory 4-4 previously stores pattern data of a plurality of different phases, and the ROM memory read control circuit 4-3 selects any one of them. Now, in the ROM memory 4-4, corresponding to phases 2-1, 2-2, 2-4, and 2-5 in Fig. 2, X123XXXX for the 2-1 phase and XXXXX567 2- for the 2-2 phase are stored in the ROM memory 4-4. It is assumed that pattern data such as X1X3XXXX for phase 4 and XXXXX5X7 for phase 2-5 is stored. Note that X may be any number other than 0 to 7, for example. The ROM read control circuit 4-3 distinguishes between an extension line (,) and a central office line (,) according to a command from the call request memory 4-1.
Also, if the number supplied from the timing generation circuit 3-3 when this command is supplied is 0 to 3, it is either or, and if the number supplied is 4 to 7, it is either or. Select pattern data based on something. For example, when a request to call an extension is made at time a as shown in Figure 2, pattern data for the extension is selected from the command, and since request a occurs at time 0, the final selects pattern data. In other words, pattern data having the closest phase is selected.

Therefore, the completion signal is sent to the instantaneous call sending circuit 4.
-2, the signal specifying the pattern data selected above and the signal indicating the number supplied from the timing generation circuit 3-3 are sent to the ROM memory 4-4 as an address. As a result, from the ROM memory 4-4, the timing generation circuit 3-4 selects the selected pattern data.
The data at the position specified by the signal indicating the number supplied from 3 is selectively output to the comparison circuit. That is, in the example 2-3 of Fig. 2, the pattern data is selected, so at time 0 it is X, at times 1, 2, and 3 it is 1, 2, 3, and at times 4, 5, 6, 7.
Then, X is outputted to the comparison circuit 4-5, respectively.

The comparison circuit 4-5 compares the data from the ROM memory 4-4 with the signal indicating the number supplied from the timing generation circuit 3-3, and if they match, the OR circuit 4 uses this as a switch control signal. -6
The signal is sent to the switch circuit 3-60 via the switch circuit 3-60. If they do not match, the switch circuit 3-70 is turned OFF and the ringing tone is stopped. Therefore, in the case of FIG. 2 2-3, the first instantaneous ringing tone is sent out in response to a request immediately, and then the ringing tone is sent out in synchronization with 2-1 that is closest in phase. Ru.

As explained above, according to the present invention, instantaneous ringing can be effectively carried out, so there is no time when a ringing sound is not sent out even when a call is received, and the call is started as soon as the telephone is picked up. nothing will happen. Further, even if there are many calls at the same time on the same floor, etc., the bell sounds are sent out based on different phases with pause periods, so the noise caused by the bell sounds can be reduced.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining the conventional calling system, Fig. 2 is a diagram for explaining the present invention, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is a ring tone sending device. FIG. 3-3... Timing creation device, 3-4...
16kHz oscillator, 3-50 to 3-5n...ringing tone sending device, 3-70 to 3-7n...switch.

Claims (1)

[Scope of Claims] 1. In a calling system of a telephone exchange in which a communication line system is commonly controlled by a central controller, there is provided: an instantaneous ringing tone generating means for transmitting an instantaneous ringing tone in response to a ringing tone transmission request; and at every predetermined cycle. means for creating a ringing tone having a common pause time and having a plurality of predetermined phases different from each other; and means for selecting a sound, and after the transmission of the instantaneous ringing tone is completed, a ringing tone having a phase closest to that selected by the selection means is transmitted.