JPH02302163A - Automatic selection incoming call communication system - Google Patents

Abstract

PURPOSE:To connect plural telephone sets and non-telephone terminal equipments connecting to a communication line selectively without waste of communication charging by providing a communication protocol for a tentative call and designating selectively a terminal equipment desired to be connected depending on number of times of tentative call. CONSTITUTION:A tentative call makes a call to an opposite party, that is, a telephone number is dialed to call the opposite party, but the call is given up when the opposite party does not reply the call after a prescribed time, and a selection incoming device 3 makes recall (main call) with the same telephone number as the tentative call after trials of several tentative calls. The called party discriminates a call arrived for t1-t2 sec after the reception of the tentative call as the main call from the party making the tentative call and takes over the incoming call to a designated terminal equipment recognized based on number of times of the preceding tentative calls. Since the call is made in excess of t0 sec in the incoming call not being the tentative call, the incoming call is given to a default terminal equipment (in general, a telephone set) after to sec and the bell of the telephone set rings.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatically selected incoming call communication method in a communication system that establishes a line by transmitting a paging signal using a communication line such as a public telephone line. be.

[Prior art]

In recent years, there has been a strong social demand for advanced use of public telephone networks, and there has been an increasing demand for connecting and using non-telephone terminal devices such as facsimile terminals and personal computers as accessories to a telephone line. For this reason, a selective call receiving function is required to select the terminal desired by the caller and receive the call. Therefore, in order to maintain the network service function without confusion while preserving the usage pattern of the subscribed facsimile communication network and remote automatic meter reading system, a multi-service switch Jv (Multi 5 service 5 w) having the above-mentioned selective call receiving function is installed on the terminal side.
A system has been proposed that aims to enable advanced utilization of telephone networks in the future by installing 1tcher, MSS).

An example of a system using the above MSS is shown in FIG. M.S.
S104 and 105 are connected to the telephone network 10 by telephone lines, respectively.
MSS 104 is connected to telephone 106 and non-telephone terminal 107, and MSS 105 is also connected to telephone 1.
08 and a non-telephone terminal 109 are connected.

When the MSS 104, 105 receives an incoming telephone call, it puts the line into an off-footer state, returns a provisional response (specific sound) to the caller, and responds to the caller's FB (button button) signal by calling the corresponding non-telephone terminal 107, 109 or telephone. Select and connect 106 and 108.

As shown in FIG. 7, after the normal telephone connection sequence, the MSS makes a provisional response to an incoming call from the telephone network. After that, the FB signal M S 1 serves as both a provisional response notification and a request.
(MSS Signal 1) is returned to the calling side, and the calling side sends a one-digit FB signal MSS 2 (MSS Signal 1), which is a selection number.
After receiving S Signal 2), the corresponding MSS extension terminal is called. However, if MS2 is not received within a certain period of time after returning the MSI, the default device will be called.

When an extension terminal calls, as shown in Figure 8, when the MSS performs up to the MS2 sending sequence, it returns an audible signal guidance I such as a talkie to the calling party, and when the extension terminal responds, it sends the MS2 as a response notification signal. A PB signal M S 3 (MSS Signal 3) with the same content as is returned and the extension terminal is connected to the telephone line.

If there is no response within a certain period of time after calling the extension terminal, a PB signal MS 4 (MSS Signal 4) and an audible signal guidance such as a talkie are sent back as an extension non-response notification signal, as shown in Figure 9. . In this way, it is possible to connect to a desired non-single-talk terminal or telephone via the MSS.

[Problem to be solved by the invention]

However, in the system using the MSS described above, call charges start when the telephone line is connected to the MSS, and there is a problem that charges are incurred even during the connection sequence with a non-telephone terminal or while calling on a telephone. was there. In other words, even if the terminal receiving the call 1Jnl cannot be connected or the person is not at home at the time of the call, there is a problem in that charges will be incurred for the duration of the call.

Additionally, there is a problem in that the use of MSS is limited to telephones that are busy.

Furthermore, when there is an incoming call, the one-talk line goes off-hook, posing the problem that the subsequent connection interface between the terminal or telephone and the MSS becomes complicated.

The present invention has been made in view of the above-mentioned points, and eliminates the above-mentioned problems, and allows the selection of a non-telephone terminal without being charged a call fee during the sequence of selecting a non-telephone terminal or during a telephone call. It is possible to connect and make calls to the telephone, and
In addition to button phones, you can also use rotary phones.
Furthermore, it is an object of the present invention to provide an automatically selected incoming call communication system that allows easy reception and delivery of incoming calls to terminals (non-telephone terminals and telephones).

[Means to solve the problem]

In order to solve the above problems, the present invention provides means for making a provisional call in a selective call termination method for a plurality of telephones or non-telephone terminals connected to a communication line in a communication system that establishes a line by transmitting a paging signal. means for selecting the non-telephone terminal according to the number of tentative calls; means for setting an incoming call hold time so as not to immediately connect a line to a telephone, such as not ringing the called party's telephone when making a tentative call; The present invention is characterized in that it includes means for passing an incoming call to a default terminal from the time when the incoming call exceeds the call holding time, and means to pass the incoming call to a terminal selected by the incoming call after processing an accidental call.

[Effect]

As mentioned above, since it is equipped with means for selecting a non-telephone terminal based on the number of provisional calls, multiple
To selectively connect a telephone set and a non-telephone terminal without unnecessary charges for call charges, and also to selectively connect a rotary telephone.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing an example of the configuration of a system to which the automatic selection incoming call communication method of the present invention is applied. Selective receiving device (5CD
) 3 is connected to another selected receiving device ° 3 via a public 1-talk network 4 . A telephone 1 and a non-telephone terminal 2 are connected to each selected call receiving device 3. In addition, the telephone 1 is included in the selective call receiving device 3.
It is possible to connect a plurality of non-telephone terminals 2.

FIG. 2 is a diagram showing the communication flow of the above system.

If both the calling side and the called party have selective calling devices (SCDs) 3, the selective calling device 3 on the calling side first makes a provisional call to the called party.

Here, the provisional call is a method of making a call to the other party, that is, dialing a telephone number to call the other party, but interrupting the call before the other party answers after a certain period of time.

For this reason, the selective terminating device 3 on the terminating side has an incoming call holding time in which it does not go off-hook even if it is called. The connected terminal is designated by the number of times a series of tentative calls are made within a certain period of time. The selected receiving device 3 on the receiving side puts the incoming call on hold for t6 seconds, and the bell of the incoming telephone does not ring during that time. The selective terminating device 3 on the receiving side recognizes an incoming call that is terminated within the incoming call holding time as a provisional call, and learns the designated terminal from the number of times.

If there are multiple tentative calls, the tentative calls that come between 1+ and t1 seconds after the tentative call ends will be recognized as tentative calls, and tentative calls that come outside of that time will be accepted by another party. Recognize it as belonging to

After making several tentative calls, the selective call receiving device 3 makes a re-call (main call) using the same telephone number as the one used when making the tentative call. The called party determines that an incoming call that comes in between tt and 1 seconds after receiving a tentative call is a real call from the place that made the tentative call, and sends it to the designated terminal, which was known from the number of tentative calls made earlier. pass the incoming call to. The subsequent steps are
It is left to the processing of each inherited terminal.

For incoming calls that are not provisional calls, the call will be made for more than t0 seconds, so the default terminal (generally a telephone) will be used after t0 seconds.
An incoming call is passed to the telephone and the bell rings.

When a plurality of selective terminating devices 3 make tentative calls to one selective terminating device 3 at the same time, the receiving side determines whether there is a tentative call outside the open base from t1 to t when receiving the tentative call, or t, to t,
Since there are multiple tentative calls between them, the system recognizes the incoming call as a duplicate and ignores the actual call when receiving the actual call, forcibly connects to the default terminal, or connects to a specific incoming call. Perform processing that gives priority only to Therefore, in this case, the caller whose call has been ignored cannot connect to the desired terminal by making the actual call. As a result, the speaking party determines that the call has overlapped with another call, and makes a provisional call again. However, if a plurality of selected call receiving devices 3 that failed at this time make a reprint call all at once, a similar duplication will occur again. To avoid this, the SCD has a function that allows each selector device 3 to randomly set the re-call time.

The called party determines whether the call is a temporary call or not based on reverse detection.

When the telephone line goes through a PBX, depending on the model of the PBX, reversing may not be possible, in which case it is detected from the ring tone. In this example, a case of reversal detection is shown.

In addition, in order for the calling party to know the time (to) of the tentative call,
This is done by detecting RBT (ringback tone) during a call.

FIG. 3 is a timing chart showing the detection method in RBT. Assuming that the minimum time to detect a meter is 0.3 seconds, it takes 0.3 seconds to confirm a call by meter detection.
It will take from 3 seconds to 246 seconds. Since the timing at which RBT is heard is uncertain, it is 2.6-0.3 seconds, or 2
．． A variation of 3 seconds occurs. In addition, due to the characteristics of the switchboard of public telephone lines, there is a difference in the call start time for both the calling and called parties, so the margin time is 0.5 seconds (±0.
25 seconds), the call would require 0.8 to 3.1 seconds. In other words, the temporary call time t.

becomes 3.1.

When the call receiving device 3 wants to connect to a certain terminal, it needs to communicate with the called party in advance to determine the number of the terminal in addition to the telephone number, and that information must be transmitted to the receiving device. The selected call receiving device 3 of both the receiving side and the calling side is stored in the memory.

Furthermore, there are two methods for connecting to a terminal by making this call. FIG. 4(a) shows a method of passing the incoming call as it is to the terminal, and the above explanation is based on that method.

Another method, as shown in FIG. 4(b), is to temporarily take the main call off-hook at the selected receiving device 3, loop the circuit,
This is a method of transmitting and receiving data for confirmation with the selective receiving device 3 on the calling side, and then connecting to the terminal. At this time, if there is no normal response from the calling party, it is determined that the incoming call from the third party's telephone has been received during tI-f, *, and guidance by voice or the like is sent to the other party. In this case, a problem similar to that of conventional MSS occurs, but this case is unlikely to occur with the amount of traffic on a normal home telephone line.

When the called side does not have a selective terminating device 3, it does not make a provisional call because it already has information on the presence or absence of the selective terminating device 3 on the calling side.
It is only necessary to connect to the public telephone network 4 for making the actual call. In addition, if the calling side does not have a selective terminating device 3, the call is received as a real call without making a provisional call, so the selective terminating device 3 of the called party assumes that the call is received by the default terminal. Recognizes the call and passes the call to the called party's telephone (default terminal) after the call is on hold.

Therefore, unless both the calling and called parties have the selective call receiving device 3, the call will be handled the same as a conventional normal telephone call, and non-telephone terminals can be operated in the same way as before, allowing the existing communication system to be operated. There is no problem with that.

Note that it is not specified whether or not the selective call receiving device 3 is allowed to process calls from a subscribed facsimile network or a telemeter sensor.

FIG. 5 is a block diagram showing an example of the configuration of the selective call receiving device 3. As shown in FIG. The selector switch 3-1 selects the line from the public telephone network 4 and selects the telephone (default terminal) when the receiving device 3 is abnormal.
This is a switch to connect directly to the The office line interface circuit 3-2 is a circuit that adapts signals on the line from the public telephone network 4 to the interface of the control circuit 3-3.

The control circuit 3-3 performs provisional call processing, recognizes the selected designated terminal, and controls the connection of the line to the terminal by the actual call,
It performs incoming call processing such as abnormal sequence processing. It also receives a call request from the telephone 1 or non-telephone terminal 2 connected to the selective call receiving device 3 and performs call processing. The telephone interface circuit 3-4 and the terminal interface circuit 3-5 are circuits for adjusting the interface of the telephone 1 and the non-telephone terminal 2 to the control circuit 3-3. The signal sending circuit 3-6 is a circuit for generating a dialing signal when dialing the public telephone network 4 at the time of making a call and passing it to the control circuit 3-3. The power source 3-7 supplies power to each of the above components. Random time generation circuit 3
-8 is a circuit for shifting the time of re-calling in each selected receiving device 3 when multiple incoming calls overlap on the receiving side at the time of making a call, and the control circuit 3 controls the random length time each time.
-3.

In addition, in the above embodiment, the explanation was given using the public one-channel network 4 as an example.
The automatic selection incoming call communication system according to the present invention is not limited to this, but can of course be applied to a communication network that establishes a line by sending a paging signal.

〔Effect of the invention〕

As explained above, according to the present invention, a provisional call communication procedure is provided, and a terminal to be connected to is selected and specified based on the number of provisional calls. An excellent effect can be obtained in that terminals can be selectively connected without unnecessary charges for call charges.

In addition, an excellent effect can be obtained in that selective connection can be made even with a rotary telephone.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a configuration example of a system to which the automatic selection incoming communication method according to the present invention is applied, Fig. 2 is a diagram showing the communication flow of this system, and Fig. 3 is a timing chart showing the detection method in RBT. , FIGS. 4(a) and 4(b) are diagrams for explaining the method of connecting to a terminal, FIG. 5 is a block diagram showing an example of the configuration of a selective receiving device, and FIG. 6 is an example of a system configuration using MSS. Figure 7 is a diagram to explain the case where a telephone is used to make a call using this system, Figure 8 is a diagram to explain a case where a terminal is used to make a call, and Figure 9 is a diagram to explain a case in which a call is made by a terminal within a certain period of time after an extension terminal calls. FIG. 3 is a diagram for explaining a case where there is no response. In the figure, 1...telephone, 2... non-telephone terminal, 3...
... Selective call receiving device (SCD), 4 ... Public telephone network, 3-1 ... Changeover switch, 3-2 ... Central line ink face circuit, 3-3 ... Control Circuit, 3-4・
...Telephone interface circuit, 3-5...Terminal interface circuit, 3-6...Signal output path, 3
-7...Power supply, 3-8...Random time generation circuit.

Claims (1)

[Scope of Claims] In a communication system that establishes a line by transmitting a paging signal, in an automatic selection incoming communication method for a plurality of telephones or non-telephone terminals connected to the communication line, after a certain period of time has elapsed after a call is made to the other party. Means for making a so-called temporary call that interrupts the call before the other party picks up; means for selecting the non-telephone terminal, etc. according to the number of times the call is made; A means of setting an incoming call hold time so that the incoming call is not connected, a means of passing the incoming call to the default terminal from the point at which the incoming call exceeds the incoming call holding time, and a means of passing the incoming call to the terminal selected by the incoming call after provisional call processing. An automatic selection incoming call communication system characterized by comprising means for passing the .