JPH02135960A - Call signal setting system - Google Patents

Abstract

PURPOSE:To identify the classification of incoming call from an opposite station by identifying a call signal arrived from an exchange, and designating the classification (cycle, tone color) of the call signal of the extension of a private branch exchange. CONSTITUTION:A connection controller 14 always scans a trunk line circuit 12, and checks the reception of the call signal of the incoming call, and sets the call signal fro extension call in the case of detecting the call signal. The connection controller 14, in the case of detecting the next call signal, sets a counter A at count (0), and also, sets a counter B at count (0). Then, the connection controller 14 checks the presence/absence of the call signal at every reception of a scan signal via the trunk line circuit 12, and steps the counter A by one count in detecting the call signal. Thus, by identifying the classification of the call signal in detecting the call signal of the incoming call and selecting the call signal of the extension set in advance at every classification and connecting it to a telephone set circuit to a telephone set to be called by the connection controller 14, it is possible to identify the classification of the incoming call.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention calls a called extension telephone when a connection control device of a private branch exchange detects an incoming ringing signal received from another exchange via a telephone line. The present invention relates to a ring signal setting method for setting a ring signal for an extension and transmitting it to a telephone line to a called telephone.

[Conventional technology]

In this type of ring signal setting system, when a connection control device detects an incoming call signal, a predetermined type of extension ring signal is connected to the called extension telephone only by detecting the ring signal.

This will be explained with reference to FIG. The private branch exchange receives an incoming call via the telephone line of another exchange through an examination of the ringing signal received via the central office line circuit (S91), and detects a ringing signal (S92). A calling signal (one type) is set (393).

[Problem to be solved by the invention]

The conventional ringing signal setting method described above has one type of ringing signal for extension calling and is configured to detect only the presence or absence of an incoming ringing signal from another exchange. Even if this function is implemented, the call ratio signal sent to the extension of the private branch exchange will be determined by the station data preset in the incoming office line circuit, and the type of incoming call cannot be identified in the extension ring signal. First, there is a drawback that there is a chance that a response to an important incoming call will be delayed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ringing signal setting method that solves the above-mentioned drawbacks by providing means for identifying an incoming ringing signal and setting a ringing signal type for an extension.

[Means to solve the problem]

The ringing signal setting method of the present invention sets an extension ringing signal to ring the called extension telephone when a connection control device of a private branch exchange detects an incoming ringing signal received from another exchange via a telephone line. In a ringing signal setting method that transmits to a telephone line to a calling telephone, when a connection control device detects an incoming ringing signal, it identifies the type of ringing signal and selects a ringing signal for a preset extension for each type. Connect to the telephone line to the calling telephone.

〔Example〕

Next, the calling signal setting method of the present invention will be explained with reference to the drawings.

FIG. 1 is a diagram corresponding to claims of the present invention, FIG. 2 is a flowchart showing an embodiment of the present invention, FIG. 3 is a relay system diagram showing an example of a calling signal transmission route, and FIG. 4 is a diagram of a calling signal transmission path. It is a time chart showing an example.

First, the transmission path of the calling signal will be explained with reference to FIGS. 3 and 4. In FIG. 3, a private branch exchange 10
is connected to an exchange 30 via a telephone line 20, and also accommodates and connects an extension telephone 15. The private branch exchange 10 has a line circuit 11, a central office line circuit 12, a switch 13, and a connection control device 14, and the exchange 30 has line circuits 31 and 31.
has.

The line circuit 11 connects the telephone 15 to the switch 13
to be accommodated. The office line circuit 12 is the line circuit 31 of the exchange 30
via the telephone line 20. The switch 13 accommodates the line circuits 11 and 11 under the control of the connection control device 14.
The station line circuits 12 are connected to each other. The connection control device 14 is
Usually a microprocessor, line circuit 11, office line circuit 1
The switching connection of the switch 13 is controlled by making full use of the signals, programs, and data sent and received via the switch 2. The telephone line 20 is a line that terminates the telephone 21 on the line circuits 31 and 32 of the exchange 30, and the line circuit 31 is connected to the private branch exchange 10 instead of the telephone.
has an interface function that connects telephone line 20 to the switches and controllers of exchange 8130.

The exchange 30 may be a public telephone office or a private branch exchange within a company, and the private branch exchange 10 may be a key telephone device.

Exchange 30 is a horizontal intercom! When the IL device 10 receives a call, the line circuit 31 sends out a calling signal, usually a signal for driving a bell with a 16 Hz sine wave, to the telephone line 20. The private branch exchange 10 receives an incoming call signal at the office line circuit 12, learns of the incoming call, and is configured to send a call signal to the extension from the line circuit 11 to the telephone 15 of the extension to be called.

FIG. 4 is a time chart showing examples of two types of call signals, and FIG. 4 (A) is a signal A with a cycle of 2 seconds transmission and 4 seconds pause.
, FIG. 4(B) is a signal B with a cycle of 1 second transmission and 2 second pause. In the private branch exchange 10, the connection control device 14 has 500
The presence or absence of a paging signal in the station line circuit 12 is investigated by scanning every m5. For signal A, 3 from scanning signal a at the start of reception.
Since "signal presence" is detected 4 times in a row, a signal with a count of 3 or more on the counter is determined to be signal A.

-For force signal B, the number of continuous counts of "signal present" is 1 to 2 times, and from the scanning signal at the start of reception, the scanning signal during signal suspension is counted, and when the counter count is detected 9 times or more, signal B is detected. It is determined that

Here, the flowchart of FIG. 1 will be explained with reference to FIG. 3 as well. The difference between FIG. 1 and FIG. 5 of the prior art is the addition of step S3. The connection control device 14 constantly scans the office line circuit 12 and investigates the reception of incoming ejection signals (
Sl)L: When a ringing signal is detected (S2), a ringing signal for calling an extension is set (S4) using a ringing signal identification procedure (S3) detailed in FIG.

Next, an embodiment of the present invention will be described with reference to FIG. 2 together with FIGS. 3 and 4. When a calling signal is detected in step S2 of FIG. 1, the connection control device 14 sets counter A to "zero" (S31) and sets counter B to "zero" (S32). Counter A is for counting three or more times when a ringing signal is present, and counter B is for counting less than two times when a ringing signal is present and nine times or more when there is no ringing signal.

When receiving a scanning signal (S33) following step S32, the connection control device 14 checks the presence or absence of a calling signal via the curved line 12 (S3) every time a scanning signal is received (333).
4) Counter A when L detects a calling signal (S35)
is incremented by one count (S36>). Following step S36, the connection control device 14 investigates the count value of counter A (S36>).
37), and when the count value exceeds 3, preparations are made to set the calling signal A for calling the extension telephone 15 (S38), and step S3 in FIG. 1 is ended. If the counter A has not reached the count value 3 in step S37, the process returns to step S33.

When no calling signal is detected in step S35, the connection control device 14 sets the counter A to the count value "zero" (S41).
At the same time, counter B is incremented by one count (S42).
After that, the count value of counter B is investigated (S43). When the counter B reaches the count value 9 in step S43, the connection control device 14 sends a calling signal B for calling the extension telephone 15.
While preparing to set (S44), if the counter B is less than 9, the process returns to step 333.

In the above example, steps S31 and 32 and steps S41 and 42
The order of each may be reversed, and the cycle of the calling signal is not limited to the above explanation. The calling signal for an extension line is not limited to the cycle, and can be changed in various ways, such as setting the type of signal by changing the tone color due to a change in frequency, for example. The types are not limited to two types either.

〔Effect of the invention〕

As explained above, the present invention enables the called party to identify the called party by identifying the ringing signal received from the exchange and specifying the type (period, tone) of the ringing signal for the extension of the private branch exchange. This has the effect of being able to identify the type of incoming call from the station, for example, determining whether an emergency response is necessary before responding.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a flowchart showing an embodiment of the invention, Fig. 3 is a relay system diagram of a calling signal transmission path, and Fig. 4 is a time chart showing an example of a calling signal. , FIG. 5 is a flowchart showing an example of the conventional method. 10.30...Switchboard, 14...Connection control device, 1
5.21...Telephone, 20...Telephone line. Figure 1

Claims (1)

[Claims] When the connection control device of the private branch exchange detects an incoming ringing signal received from another exchange via the telephone line, it sets an extension ringing signal to ring the called extension telephone and sends it to the telephone line to the called telephone. In the ring signal setting method,
A call characterized in that when the connection control device detects an incoming ringing signal, it identifies the type of the ringing signal, selects a ringing signal for an extension set in advance for each type, and connects to the telephone line to the called telephone. Signal setting method.