JPS63199564A - Information transmitting system - Google Patents

Abstract

PURPOSE:To simplify a device, to reduce the price of it, and to make a communication chage unnecessary by making a center interrupt a call after the call of a calling time determined beforehand, making a terminal not answer to the call during the definite time, and utilizing the call interrupted during the range of the difinite time as a notice information from the center to the terminal. CONSTITUTION:A calling part 33 disconnects the call, and interrupts the call after the elapse of the definite time t1 since the point of time when a terminal ringing tone is returned. Following such the operation of the calling part 33, a telephone network 2 calls the terminal 1 for the definite time t2. On the other hand, when the terminal 1 is called from the telephone network 2, it makes a ringing tone detecting part 13 measure the calling time (t). Besides, the terminal 1 does not perform an off-hook during the time while the ringing tone from the center 3 is received. When the calling time (t) is fixed, the ringing tone detecting part 13 transmits the report of the call to a control part 11. Thus, since the information transmission from the center is detected depending on the continuing time of the ringing tone, the constitution of the terminal comes to be simple and cheap, and the communication charge comes to be unnecessary.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in a system consisting of a center such as a personal computer network or videotex, a terminal, and a telephone network, in which information consisting basically of one bit, such as an indication of incoming mail, is used. This relates to an information transmission method for transmitting information from a center to a terminal.

[Conventional technology]

Conventionally, in this type of information transmission system, after a call is made from a center to a terminal, the terminal responds (off-hook).
A method is used in which a communication bus is established through a communication line, information such as incoming mail is transmitted, and then a disconnection process is performed.

[Problem that the invention seeks to solve]

Conventional information transmission methods of this type require an automatic response device to respond unattended, the control of responses, path establishment, disconnection processing, etc. is complicated, making the device expensive, and communication charges high. There were some drawbacks, such as what was required.

[Failure to solve the problem]

The present invention solves the conventional problems and the device is simple.

In order to provide a low-cost information transmission method that does not require communication charges, in a system that transmits information between a center and a terminal via a telephone network, the center has a predetermined call time for a worker's call. After interrupting the call, the terminal waits for a certain period of time 1. (= 1. + ring length cycle tα)
Do not answer calls within a certain time range 1 (1, -1
, < 1 < 11+1. ), the interrupted call is used as notification information from the center to the terminal.

[For production]

The present invention is characterized in that information is transmitted from the center to the terminal without going off-hook, and information can be transmitted only by detecting a call within a certain time range at the terminal. Examples will be described below based on the drawings.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which 1 is a terminal, 11 is a control unit, 13 is a modem, 13 is a ring detection unit, 2 is a telephone network,
3 is a center, 31 is a control section, 32 is a modem, and a caller. To operate this, the control unit 31 of the center 3
The terminal sends a call request for a terminal worker to the calling district.

After opening the calling unit and going off-hook, dial the telephone number of terminal 1 and wait for the terminal ring tone to return. Furthermore, the period between calling parts is a certain period of time (tl) from the time when the terminal ring tone is returned.
After the elapsed time, the call is disconnected (on-hook) and the call is interrupted. Due to the operation of the calling unit, the telephone network 2 calls the terminal 1 for a certain period of time (t8). On the other hand, when the terminal l receives a call from the telephone network 2, the ring detecting section 13 measures the ringing time (1). Further, the terminal 1 does not go off-hook within the time (maximum value of 1) for receiving the ringing tone from the center 3. When the ringing time (1) is determined, the ringing tone detection unit 13 sends a ringing report to the control unit 11. When the control unit 11 receives the ring report together with the ring time (1) from the ring detection unit 13, the length of the ring time (1) is within a certain time range, that is, (1, -
1, ≧1 < 11+1. ), and if it is within a certain time range, it is determined that information has been transmitted from the center 3 to the terminal 1, and the indicator of the terminal 1 is turned on. The user of terminal 1 sees the indicator and learns that, for example, there has been an incoming mail notification from center 3 to terminal 1), and calls center 3 to check the contents. A call is made from the terminal 1 to the center 3 by the control unit 11. Sodam 12. Telephone network 2. Modem 32. The condyles of the control unit 31 are notified. Further, when the terminal 1 makes a call to the center 3, the control unit 11 of the terminal 1 turns off the indicator of the terminal 1.

FIG. 2 shows the relationship between the calling signal between the center, the telephone network, and the terminal, where 4 is the calling signal from the center to the terminal, 41 is the dialing time, 42 is the connection waiting time, and 43 is the calling time t.
□, 5 is the terminal ring tone returned to the center, 6 is the ring tone sent to the terminal, 61 is the uncertain time at the start of the call, 6
2 is the fixed time of the call, and 2 is the uncertain time at the end of the call. The connection waiting time 42 is the period from the end of the dialing time 41 to when the terminal ring tone 5 returned to the center 3 is received at the calling station. After receiving the terminal ringing tone 5 returned to the center, the calling unit 33 determines the ringing time 43(t,
), go on-hook and interrupt the call. The ring tone 6 sent to the terminal 1 in response to the operation of the calling group is sent to the center 3.
Due to the phase difference between the terminal ring tone 5 returned to the terminal 1 and the ring tone 6 sent to the terminal 1, in addition to the time when the operation is certain, that is, the ring confirmation time 62, there is a time when the operation is uncertain, that is, when the call starts, There are uncertain times 61 and 63 at the end.

Further, the uncertain time 61°B at the start and end of the call extends approximately T/2 before and after the leading edge and the trailing edge of the terminal ring tone 5 returned to the center. Here, T represents the long cycle of the ringing tone. Therefore, the ring tone 6(t) sent to terminal l can be expressed by the following equation (1).

When the control unit 11 of the terminal receives the ringing time (1) report from the ringing tone detection unit 13, it checks whether formula (1) is satisfied, and if it is satisfied, the center 3 notifies the terminal 1 of the information. It is determined that there was.

In order to transmit information from the center 3 to the terminal 1 at the highest speed according to the present invention, the ringing time t1 should be approximately the long period T of the ringing tone, and the ringing tone 6(t) sent to the terminal 1 should be 0 or more.

If the information carried by the present invention consists of 1 bit, it is not only an incoming mail indicator, but also an indicator that the center is operating.
It can also be used for displaying obstacles, etc. However, the content must be agreed upon in advance between the center and the terminal. Furthermore, the content must be selected taking into consideration that information may not be transmitted 100% correctly.

〔Effect of the invention〕

As explained above, in the information transmission method of the present invention, the terminal does not go off-hook and the information transmission from the center is detected by the connection time of the ring tone, so the terminal configuration is simple and inexpensive, and there is no communication fee. It has the advantage of being

[Brief explanation of the drawing]

FIG. 8g1 is a schematic diagram of the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the relationship of calling signals among the center, telephone network, and terminals. 1...Terminal 11...Control unit 12...Modem 13...Ring detection unit 2...Telephone network 3...Center 31...Control unit 32...Modem... Paging unit 4...Call signal from the center to the terminal 41...Dialing time 42...Connection waiting time 43...Call time 5...Terminal ring tone returned to the center 6...Sent to the terminal Ringing tone 61...Undetermined time at the start of the call 62...Undefined time at the end of the call Patent applicant: Nippon Telegraph and Telephone Corporation Representative Patent Attorney Hisashi Tamamushi Gobu ( p. 12) Schematic diagram of the configuration of the embodiment of the present invention M 1 Figure Diagram showing the relationship of calling signals between the center, telephone network, and terminals Figure 2

Claims (1)

[Claims] In a system for transmitting information between a center and a terminal via a telephone network, the center has a predetermined call time t_
The terminal interrupts the call after 1 ring, and the terminal does not respond to the call within a certain time t_2 (=t_1 + ring length period t_α), and the terminal continues to operate within a certain time range (t_1−tα≦t≦
t_1+t_α), the interrupted call is used as notification information from the center to the terminal.