JPH02302164A - 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 the length of the 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 terminal equipment to be connected is selected depending on the time length of the tentative call. A caller selection incoming device 3 makes recall (main call) with the same telephone number as the tentative call after trial of the tentative call. The called party discriminates a call arrived for t3-t4 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 the length of the preceding tentative call. Since the call is made in excess of t2 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 t2 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. .

[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. Therefore, there is a need for a selective call receiving function that selects the desired terminal for calling and receiving calls. Therefore, in order to maintain the network service functions without confusion while preserving the usage pattern of the subscribed facsimile communication network and remote automatic meter reading system, a multi-service switcher (Multi 5 service 5w1) 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 tcher (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 101 through telephone lines 102 and 103, respectively, a telephone 106 and a non-telephone terminal 107 are connected to the MSS104, and the MSS1
05 is also connected to a telephone 108 and a non-telephone terminal 109.

When the MSS 104, 105 receives an incoming telephone call, it puts the line into an off-footer state, returns a provisional response (specific tone) to the caller, and responds to the caller's PB (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, FB signal M S 1 serves as both notice and request for board response.
(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 Signial 2), the corresponding MSS
Calls the extension terminal; however, if MS2 is not received within a certain period of time after returning the MSI, the default device is called.

Also, 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 heating side, and when the extension terminal responds, it sends a response notification signal as a response notification signal. A PB signal MS3 (MSS Signal3) having the same content as MS2 is returned to connect the extension terminal 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 a TO
Return the audible signal guidance■ such as keys. In this way, it is possible to connect to a desired non-telephone terminal or telephone via the MSS.

[Problem to be solved by the invention]

However, in the system using the MSS mentioned above, call charges start as soon as the telephone line is connected to the MSS, and charges are also incurred during the connection sequence with a non-telephone terminal or while making a call on the telephone. There was a problem. In other words, if the receiving terminal is unable to connect or
There was a problem in that even if the person was not home at the time of the call, charges would be incurred for the duration of the call.

Another problem was that the use of MSS was limited to one-speech phones.

Furthermore, when there is an incoming call, the telephone line goes off-hook, which causes 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-mentioned problems, the present invention provides a communication system that establishes a line by transmitting a paging signal, in which a plurality of telephones or non-telephone terminals connected to the communication line automatically selects and receives a call. means for making a so-called tentative call that interrupts the call before the other party picks up after a certain period of time; means for selecting a non-telephone terminal depending on the length of the tentative call; means to set an incoming call hold time so that the line is not immediately connected to the telephone, such as not ringing, a means to pass the incoming call to the default terminal from the time the incoming call exceeds the incoming call hold time, and provisional call processing. The present invention is characterized by comprising means for passing the incoming call to a terminal selected in the subsequent incoming call.

[Effect]

As mentioned above, this automatic selection terminating method is equipped with a means to select a non-telephone terminal based on the length of the tentative call. You can connect selectively without unnecessary charges.

Furthermore, the calling party is not limited to a telephone, but can also be selectively connected using 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 other selective call receiving devices 3 via the public telephone network 4. A telephone 1 and a non-telephone terminal 2 are connected to each selected call receiving device 3. Furthermore, it is possible to connect a plurality of telephones 1 and non-telephone terminals 2 to the selective call receiving device 3.

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

If there is a selective terminating device (SDC) 3 on both the originating side and the terminating side, the selective terminating device 3 on the originating side first makes a provisional call to the terminating side.

Temporary calling is a calling method in which a call is made to the other party, that is, a telephone number is dialed to call the other party, but the call is interrupted after a certain period of time before the other party picks up. 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 based on the time length of this provisional call.

The selected receiving device 3 on the receiving side is t! put the incoming call on hold for seconds,
During this time, incoming calls will not ring.

Then, the selective terminating device 3 on the receiving side recognizes the incoming call that is terminated within the incoming call hold time as a tentative call, and learns the selected terminal from the length of the call.

After making the tentative call, the selective incoming call device 3 on the calling side makes a re-call (main call) using the same one-talk number as at the time of the tentative call. The called party judges that an incoming call that comes between t and t4 seconds after receiving a tentative call is a real call from the place where the tentative call was made, which can be determined from the length of the tentative call. Pass the incoming call to the specified terminal. The subsequent steps are left to the processing of each inherited terminal. Since an incoming call that is not a tentative call is called for more than t1 seconds, the incoming call is passed to a default terminal (generally a telephone) after t1 seconds, and the bell of the telephone rings. The selection of the terminal is determined by the length of the tentative call, to, j+, tx, and in this embodiment, up to three terminals can be selected in addition to the default terminal, such as terminal 1 for a tentative call that ends within t0 seconds. .

When multiple selective terminating devices 3 make provisional calls to one selective terminating device 3 at the same time, the called party recognizes that the calls are duplicated because there is also a provisional call between t and t when the receiving party receives the provisional call. When a call is received, the call is ignored, the call is forcibly connected to the default terminal, or a specific incoming call is prioritized. Therefore, in this case, the call is ignored. In addition, the calling side selective incoming call device 3 is connected to the desired terminal in this call, and the calling side thereby determines that the call is duplicated with another call and makes the call again.

The length of the tentative call is determined by reverse detection on the receiving side.

When going through a telephone line PBX, depending on the model of this PBX, there may be no reversal, and in that case, it is detected from the ring tone. In this example, a case of reversal detection is shown. Further, the calling side can know the time (t,) of the tentative call by detecting RBT (ringback tone) during the call. Figure 3 is a timing chart showing the detection method in RBT, and the maximum/J% time to detect makeup is 0.3.
Assuming seconds, it would take 0.3 seconds to 2.6 seconds to confirm the call by meter detection. Since the timing at which RBT is heard is uncertain, 2.
A variation of 6-0.3 seconds, that is, a few seconds, occurs. Also, due to the characteristics of the public telephone line exchange, there is a difference in the call start time for both the calling and called parties, so if you add 0.5 seconds (±0°2.5 seconds) as a margin time, the number of calls will be zero. .8 to 3°1 second is required. In other words, the temporary call time t is 3.1.

Since it is assumed that the value of 1+ does not overlap with t,
3.2 seconds or more is required, so you can add 2.9 seconds, which is 3.2 minus 0.3 seconds. In other words, t is 2.6+2
．． 9=6.5 seconds. Similarly t.

is 8.9 seconds. Therefore, in order to identify three terminals other than the default terminal, in this case, the incoming call holding time at the selected incoming call receiving device 3 on the incoming side is required to be 8.9. When the number of terminals to be identified is one other than the default terminal, the incoming call holding time is only 3.1 seconds, and the terminal adapter allows the incoming call holding time to be changed depending on the number of connected terminals, thereby eliminating unnecessary calls. I try not to take call hold times.

When the calling side's selection receiving device 3 wants to connect to a certain terminal, it is necessary to contact the receiving side in advance to determine the number of the terminal in addition to its telephone number, and that information is The selected call receiving device 3 on both the called side and the calling side is stored.

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 accepted between t and t1, and guidance by voice or the like is sent to the other party. In this case, the conventional M
A problem similar to SS occurs, but this case is almost certainly not the case 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 manner as before, making it easy to operate the existing communication system. There are no problems.

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 electric machine 1 or non-telephone terminal 2 connected to the selective call receiving device 3 and performs call processing. Telephone interface circuit 3-4 The terminal interface circuit 3-5 is a circuit 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 transmits a public T-question 4 at the time of transmission.
This is a circuit for generating a dialing signal when dialing, and passing it to the control circuit 3-3. Electric power R3-7 supplies power to each of the above-mentioned parts. Although the above embodiment has been explained using Public X Question 4 as an example, the automatic selection incoming communication method according to the present invention is not limited to this.
It goes without saying that the present invention can be applied to communication networks that establish lines by sending paging signals.

〔Effect of the invention〕

As explained above, according to the present invention, a provisional call communication procedure is provided, and the terminal to be connected is selected and specified based on the length of the provisional call. An excellent effect can be obtained in that a telephone terminal 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 the drawing]

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 ... Office line interface circuit, 3-3 ... Control circuit , 3-4・
... Telephone interface circuit, 3-5 ... Terminal interface circuit, 3-6 ... Signal sending circuit, 3
-7...Power supply.

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. A means for making a so-called temporary call that interrupts the call before the other party picks up, a means for selecting the non-telephone terminal, etc. according to the length of the temporary call, and a means for immediately connecting the called party's telephone, etc. when making a temporary call. means to set an incoming call holding time so that the incoming call is not connected, a means to pass the incoming call to the default terminal from the point at which the incoming call exceeds the incoming call holding time, and a means to set the incoming call to the selected terminal after provisional call processing. An automatic selection incoming call communication system characterized by comprising means for passing incoming calls.