JPS63274255A - Terminal changeover controller - Google Patents

Abstract

PURPOSE:To switch a personal computer communication equipment and a facsimile equipment automatically to a telephone line by switching the telephone line once to the personal computer communication equipment after a DC loop closing of a telephone line based on a telephone call signal and switching the line to the facsimile equipment when a telephone call signal is detected consecutively within a prescribed time after a call comes. CONSTITUTION:When a telephone call signal comes from telephone lines L1, L2, a control means 13 gives a command signal to a line hold means 10 to close a DC loop and to hold the line. Then a relay contact 8 is closed to connect the telephone lines L1, L2 once to the personal computer communication equipment 5 and uses a reply signal sending means 11 to send a reply signal to the caller personal computer communication equipment. When the signal exists continuously within a prescribed time after the call comes, the relay contact 8 is thrown to the position of the facsimile equipment 6 to start the facsimile equipment 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a terminal switching control device for switching and connecting a personal computer communication device and a facsimile device to a telephone line.

[Prior art]

In recent years, the use of data transmission systems using subscriber telephone lines has been increasing, and in particular, personal computer communication devices (hereinafter referred to as personal computer communication devices) and facsimile devices have become widespread. Conventionally, in order to switch and connect this terminal device to a telephone line, manual switching is common, which has the problem that repeating is complicated and inconvenient.Therefore, a terminal switching control device that can automatically switch is needed. was desired.

[Purpose] The present invention was devised in view of the above-mentioned conventional problems and to solve them.The purpose of the present invention is to automatically switch and connect a personal computer communication device and a facsimile device to a telephone line. An object of the present invention is to provide a new terminal switching control device that can perform the following steps.

〔composition〕

In order to achieve the above object, the present invention provides means for closing a DC loop of a telephone line based on a telephone ringing signal in a terminal switching control device for switchingly connecting a personal computer communication device and a facsimile machine to a telephone line. After closing the same loop, switch the telephone line to the PC communication device side.
means for transmitting a response signal to the calling PC communication device; and means for controlling switching of the telephone line to the facsimile device when the signal is continuously detected within a predetermined time after receiving the call. and means for activating the facsimile machine.

〔Example〕

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

First, the overall configuration shown in Figure 1 will be explained.
is the main body of the terminal switching control device, and telephone lines , , L□ are connected to the device l. Reference numeral 2 denotes a modem, and the modem 2 is connected to a terminal switching control device 1 via a connection cable 3 and to a personal computer communication device 5 via a connection cable 4. 6
is a facsimile device, and the device 6 also has a connecting cable 7.
It is connected to the terminal switching control device 1 via. In addition,
The modem 2 can be sewn integrally into the terminal switching control device ffl, and a telephone with a modem can also be used as the modem 2.

Next, the circuit configuration of the terminal switching control device l will be explained with reference to FIG. 2. Reference numeral 8 represents a relay contact;
A telephone line 6, Lx is connected to the break contact side, and a facsimile machine 6 is connected to the break contact side, while a personal computer communication device 5 is connected to the make contact side via a modem 2. 9 is a telephone call signal (161
Detection means for detecting [z) and line holding means 10 hold the line by closing a DC loop based on the detection of a telephone call signal. 11 is a response signal (for example, CCI TT,
V, 22te 4!2100+1z, BELL212A
22251fz)).
2 is a detection means for detecting whether or not there is a continuous signal within a predetermined period of time (for example, from 0.5 seconds to 5.5 seconds) after receiving a call; 13 is a means for controlling switching of relay contact 8, etc. This is a GII control means for performing various controls, and is mainly composed of a CPU.

Reference numeral 14 denotes a starting means for starting the facsimile machine 6, and in this example, it is configured to trigger the oscillation circuit 13001.

Next, the operation of the above embodiment will be explained.

In the standby state, the telephone lines L+ and Lx are connected to the facsimile machine 6 via the relay contacts 8. In this state, when a telephone call signal arrives from the telephone lines L+ and L□, the telephone call signal detection means 9 detects this, and this detection signal is input to the control means 13. The control means 13 issues a command signal to the line holding means lO to close the DC loop and hold the line.Then, based on the command from the control means 13, the relay contact 8 is operated to temporarily disconnect the telephone lines L+ and Lx. It is switched and connected to the PC communication device 5 side, and the response signal sending means 11 sends out a response signal to the PC communication device on the calling side. and,
If the calling party is a personal computer communication device, a carrier signal is sent and known personal computer communication is started. Further, the detection means 12 detects whether or not there is a continuous signal within a predetermined time after receiving a call, and if the calling side is a facsimile machine, the detection means 12 is turned ON, and this causes the control means 13 to turn on the detection means 12.
The control means 13 outputs a command signal to switch and connect the relay contact 8 to the facsimile machine 6 side, and the telephone lines Ll and Lt return to the standby state, and the activation means 14 is turned on to start the facsimile machine 6. Device 6 is activated,
Thereafter, well-known phase procedures are executed and facsimile reception is performed.

When the facsimile reception is completed in this way, the facsimile machine 6 stops, the DC loop is opened, and the facsimile machine 6 waits for the next new incoming call.

〔effect〕

As is clear from the detailed description above, according to the present invention, it is possible to automatically switch and connect a personal computer communication device and a facsimile device to a telephone line, and data for personal computer communication and facsimile communication will continue to increase in the future. It is extremely useful for transmission.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being an explanatory diagram of the overall configuration, and FIG. 2 being a block diagram of a control circuit. - terminal switching control 21 device 5 - personal computer communication device 6 - facsimile machine 8 - relay contact 9 - telephone call signal detection means 10 - line holding means 11 - response signal sending means 12 - detection means 13 - control means 14 -・Starting means

Claims (1)

[Claims] A terminal switching control device for switching and connecting a personal computer communication device and a facsimile device to a telephone line includes means for closing a direct current loop of a telephone line based on a telephone ringing signal, and a means for closing a direct current loop of a telephone line based on a telephone ring signal, and a means for connecting a telephone line to a PC once after closing the loop. a means for controlling switching to the communication device side; a means for sending a response signal to the calling PC communication device; and a means for switching the telephone line to the facsimile device side when the signal is detected continuously within a predetermined time after receiving the call. 1. A terminal switching control device comprising means for controlling switching and means for activating a facsimile machine.