JPS63108847A - Automatic terminal switching device - Google Patents

Abstract

PURPOSE:To switch and connect a telephone line to a telephone set or a non- telephone system terminal automatically, by providing a means which detects a call signal and a communication request signal. CONSTITUTION:When a call signal of 16Hz from a calling side is transmitted from a telephone line La or Lb, it is detected by a call signal detecting means. The detection signal is inputted to a controller 8, and also, switches 21a and 21b are turned ON, and a lien state detecting means 9 and a timer 22 are operated. In this way, a loop is closed by a line holding means 10, and also, relay contacts 4a and 4b, and 5a and 5b are switched to make sides, then, the telephone set 1 is connected to the telephone lines La and Lb. Meanwhile, since the communication request signal is transmitted of the calling side is a computer, it is detected at a detector 12, and the lines La and Lb are connected to the computer 2 side. Also, when it is a facsimile 3, the call signal is detected by a detector 14, then switching is performed.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an automatic terminal switching device, and more specifically, in a data transmission system using a public telephone line, the present invention relates to an automatic terminal switching device, and more specifically, in a data transmission system using a public telephone line, a telephone is connected to a computer as a non-telephone terminal. This invention relates to an automatic switching device.

[Prior art]

In recent years, the use of data transmission systems that use public telephone lines has been increasing, and recently, computer (personal computer) communication has become widespread. Conventionally, when a telephone and a non-telephone terminal (computer) are connected to this public telephone line, if the non-telephone terminal is in automatic call receiving mode, the non-telephone terminal will respond to calls made from the telephone. The terminal answers, and the calling party cannot connect to the other party's phone even though the call is made, and it is unpleasant to hear the automatic answering tone.
There is a problem in that the called side cannot receive an incoming call as long as the automatic incoming call mode is set.

[Purpose of the invention]

The present invention was devised in view of the above-mentioned conventional problems and to solve the problems. An object of the present invention is to provide an automatic terminal switching device that is equipped with a terminal identification function that allows incoming calls to non-telephone terminals (computers) and can automatically switch lines.

[Structure of the invention]

In order to achieve the above object, the present invention provides a data transmission method using a public telephone line connected to an exchange.
means for detecting a ringing signal from an exchange to close the loop; means for detecting a communication request signal from the calling side after the loop is closed; and switching the line to a computer based on the detection of the communication request signal. In addition, the configuration includes means for activating this, and means for opening the loop on the exchange side after communication is completed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 1 is a telephone, and 2 is a computer serving as a non-telephone terminal, and this computer 2 is equipped with a modulation/demodulation device and is capable of computer communication. 3 is another non-telephone terminal such as a facsimile machine. Then, the telephone 1 also transmits via the relay contacts 4a and 4b,
The computer 2 can be connected via relay contacts 5a and 5b, and the facsimile machine 3 can be connected to the public telephone A1Lb via contacts 6a and 6b connected to the make contacts of the relay contacts 5a and 5b. 7 is a calling signal detection means for detecting a 16Hz calling signal from the exchange;
8 is a controller composed of a microprocessor (CPU); 9 is line state detection means; 10 is line holding means; 11
12 is a voice response signal transmitter consisting of a voice synthesis IC, and 12 is a detector for detecting a computer communication request signal sent from the calling side. ” (Showa 59
10007 Call Identification Signal (C3T)
). Reference numeral 13 denotes a computer start signal generating means for starting the computer 2 based on the detection signal of the detector 12. 14 is a detector for detecting a facsimile 'J device ringing signal sent from the calling side, and this ringing signal is detected by the International Telegraph and Telephone Consultative Committee (CCITT).
Based on the recommendations of
This is a second-off repeat signal (CNG). Reference numeral 15 denotes a facsimile device activation signal generating means for activating the facsimile device 3 based on the detection signal of the detector 14;
17 is a speaker, 18 is a terminal for connecting a recording means such as a tape recorder for recording a message from the calling side, 19 is an answer recording control means, and 20 is a ring tone melody mechanism.

Subsequently, the operation of the above embodiment will be explained. In the standby state, the telephone l has a telephone port fUa.

The computer 2 is disconnected from the relay contact 5 as
5b to the telephone line La%Lb, and in this state, when a 16Hz ringing signal is sent from the calling side from the telephone line La, Lb, this is detected by the ringing signal detection means 7, This detection signal is input to the controller 8, and the switch 21a121b is turned on.
The signal is input to the controller 8 via a line state detection means 9 and a timer 22. Furthermore, line holding means 10
While the loop is closed by the controller 8, the relay contacts 4a, 4b and 5a, 5b are respectively switched to the meter contact side, the telephone 1 is connected to the telephone lines La, Lb, and the computer 2 is connected to the telephone lines La, Lb. It is separated from Lb. In addition, the switch 23 is turned on and the voice response signal transmitter 11 sends a prerecorded response message (for example, ``Moshi Moshi ○○'').

Who are you. ') is sent from the called side to the calling side. When the calling party makes a telephone call, the voice is heard through the amplifier 16 and the speaker 17. In this case, if the telephone 1 is off-hook, the voice is heard by the telephone priority circuit means 24. The calling party uses it as a regular telephone to communicate with the calling party. On the other hand, if the called party is away, the call will be answered.)
After v (tone ringer) rings an appropriate number of times, a response message (for example, °
Yes, it's ○○. I'm away from home at the moment, so if you have any messages, please leave them in the tone. ”) is sent to the calling party. Also, terminal 18
By connecting a recording means such as a tape recorder to the telephone, messages from the calling party are recorded and recorded as an answering machine.

Next, if the calling party is a computer, a communication request signal (
1800HzC3T signal) is transmitted, this is detected by the detector 12, this detection signal is input to the controller 8, and the relay contact 4a,
4b is turned off, the relay contacts 5a and 5b are switched to the break contact side, and the telephone lines La and Lb are connected to the computer 2 side again. Furthermore, the computer 2 is started based on a command from the computer start signal generating means 13. It has become so. The subsequent message receiving procedure will be performed according to each phase specified in the above-mentioned "Recommended Communication Method for Personal Computer Communication Devices" and the CCITT Recommendation V Series, etc., but since this is well known, the explanation will be omitted. .

When the message reception between the computers is completed, the computer 2 stops booting, the loop is released, and the computer 2 returns to the standby state for the next new call.

Also, if the calling party is a facsimile machine, a ringing signal (
1100Hz CNG signal) is transmitted, this signal is detected by the detector 14, and based on this detection signal, the controller 8 controls the relay contacts 5a, 5b, and 6a.
, 6b are respectively disconnected to the meter contact side, and the facsimile device 3 is activated by a command from the facsimile IJ device activation signal generating means 15, and thereafter the same operation as in the case of the computer 2 is performed. It is.

〔Effect of the invention〕

As is clear from the detailed description above, according to the present invention, it is possible to automatically switch and connect telephone lines by providing a terminal identification function between telephones and non-telephone terminals (computers), and this invention will further improve in the future. Computers expected to grow (
It is extremely useful for communication (PC).

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the present invention. 1...Telephone, 2...Computer, 4a, 4b,
5a. 5b...Relay contact, 7...Call signal detection means, 8
. . . Controller, 10 . . . Line holding means, 12 . . . Communication request signal detector, 13 . . . Computer activation signal generation means

Claims (1)

[Claims] In a data transmission system using a public telephone line connected to an exchange, a means for detecting a calling signal from the exchange to close a loop, and a means for detecting a communication request signal from the calling side after the loop is closed. An automatic terminal switching device comprising: a means for switching a line to a computer based on detection of the communication request signal and activating the same; and a means for opening the loop to the exchange after the communication is completed. .