JPS6046649A - Network control device - Google Patents

Abstract

PURPOSE:To inform a response to an originator by connecting a general automatic telephone device to a network control device for data communication through a telephone circuit, and if a response is generated from a data terminal within a prescribed time after an automatic response based upon a call, switching the telephone circuit to the terminal side. CONSTITUTION:When a telephone circuit terminal 1 is terminated by an originator, a calling signal is detected by the automatic telephone response device 16, a DC circuit is closed, a voice response is outputted to the circuit and an L relay 4 is actuated to start a timing circuit 9. After a fixed time, the circuit 9 generates an output to a line 10, an H relay 12 is actuated and the telephone circuit is held independently of the state of the device 16 switching a current interrupting coil 6. When the timing circuit 9 sends a call display CI signal to a data terminal DTE20 and the terminal 20 sends a CML signal after receiving the CI signal, the CML relay is actuated and circuits L1, L2 are switched from the device 16 side to the terminal 20 side. If the CML signal is not detected within the time determined by the timing circuit 9, the H relay 12 is restored to restore the telephone circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a network control device used for data communication over a telephone line, and more particularly to a network control device to which a general-purpose automatic telephone answering device or the like can be easily connected. When communicating, the procedure is to respond by voice to an incoming call. Therefore, a network control device with a built-in voice response function must be used, which has the disadvantage that the network control device is expensive and maintenance is complicated.

An object of the present invention is to solve the above-mentioned drawbacks by providing a network control device with a function that allows connection of a general-purpose automatic telephone answering device, etc. without providing a voice response function, and to provide a voice response to incoming calls from a telephone line. The purpose is to provide a network control device that can

According to the present invention, in a network control device that is connected to a telephone line and automatically switches from a call with a telephone set or an automatic telephone answering device to data communication with a data terminal device, etc., the telephone model or automatic telephone answering device, etc. a terminal for connecting an occlusion wire, a switching means for connecting the occlusion wire in parallel to the telephone or the automatic telephone answering device upon detection of a ringing signal by the telephone or the automatic telephone answering device; means for transmitting call information to a data terminal device a second time after a voice response from an automatic telephone answering device, and for restoring the switching means when there is no response from the data terminal device after a predetermined period of time; and the data terminal device. and switching means for switching the telephone line and the blocking line from the telephone or automatic telephone answering device side to the data terminal device side in response to a response.

Next, embodiments of the present invention will be described with reference to the drawings.

The figure shows an example circuit diagram of the actual implementation of the present invention, and shows a telephone line T
v1. Terminal 1 connected to L 2 and CML relay 1
5, two contact points 2 and two contact points 7, a blocking wire ring 6, and two of the H IJ relays 2 that switch the blocking wire ring 6.
one contact 5, a terminal 3 for connecting an automatic telephone answering device, etc., and a telephone line L1. L relay 4 and its contact 8 that detects the direct current of L2, a time limit circuit 9 that starts when contact 8 closes, output signal lines 10 and 11 of time limit circuit 9, and call indicator (CI) signal terminal 13. , line connection command (CM
L) Signal terminal 14 and data terminal equipment (DTE) 20
The CML signal interface circuit 17 receives CML signals from the CML signal interface circuit 17, and the CML relay 15 operates based on the output of the CML signal interface circuit 17. The state of each contact 2, 5.7 and 8 is determined by the H relay 12. This is the state when L relay 4 and CML relay 15 are not operating.

In the network control circuit 1, when a call is received from the caller to the telephone line terminal 1, a ringing signal is sent to the contact 2 of the CMLIJ relay 15.
is detected by the automatic telephone answering device 16, and the DC circuit is closed. When the DC circuit is closed, automatic telephone answering device 1
6 makes a voice response to the line. Furthermore, the L relay 4 is activated by closing the DC circuit, and the contact 8 of the L relay 4 is closed. This activates the timer circuit 9, and after a certain period of time has elapsed, the timer circuit 9 outputs an output signal to the output signal line 10. The HIJ relay 2 is activated by this output signal, and its contact 5 is operated to switch all of the blocking wires 6. That is, the automatic telephone answering device 16 is connected in parallel to the automatic telephone answering device 16.
hold the telephone line regardless of its state. Next, time limit circuit 9
outputs a call indication (CI) signal to the output signal line 11 and sends it to the DTE 20 from the CI terminal 13. D'I
' When the E 20 detects a call based on the CI double signal, it generates a CML signal and outputs it to the CML terminal 14 . This CML signal is detected by CML signal interface circuit 17 and activates CML relay 15. Therefore, contacts 2 and 7 of CMLIJ relay 15 switch, and telephone line L1. L2 is from the automatic response device 16 to DT
Switch to E20 side. The blocking wire 6 and the capacitor C cut the DC component. The time limit circuit 9 operates the HIJ relay 2 even while the CML signal interface circuit 17 is detecting the CML signal from the DTE 20, but even if the time determined by this time limit circuit has elapsed, the CML signal (M interface When the CML signal is not detected in the circuit 17, the output to the output signal line 1° is stopped, the H relay 12 is reset, and its contact 5 is opened.In other words, the blockage line 6 is connected from the telephone line L1, L2. Disconnect and release the DC circuit.

As described above, the present invention can inform the caller whether or not all data terminals are being used by configuring the network control device to be connected to a conventional telephone or automatic telephone answering device.

[Brief explanation of drawings]

The figure is a circuit diagram showing one embodiment of the present invention. 1...Telephone line terminal, 2...CML relay contact, 3...Connection terminal for automatic telephone answering device, etc., 4...L relay, 5... ... HIJ sire, 6 ... Blocked line, 7 ... CML
Relay contact, 8...L relay contact, 9...
...Time limit circuit, 10.11...Time limit circuit output signal line, 12...HIJ relay 13...
CI terminal, 14...CML terminal, 15...
... CML relay, 1 [5 ... automatic telephone answering device, 17 ... CML signal inkゝ-□)

Claims (1)

[Claims] In a network control device that is connected to a telephone line and automatically switches from a call with a telephone set or automatic telephone answering device to data communication with a data terminal device, etc., a terminal for connecting the telephone set or automatic telephone answering device, etc. a switching means for connecting the blocking wire in parallel to the telephone or automatic telephone answering device by detecting a calling signal by the telephone or automatic telephone answering device; means for transmitting call information to the data terminal device after a predetermined period of time, and means for restoring the switching means when there is no response from the data terminal device after the lapse of the predetermined period; A network control device comprising: switching means for switching the blocking wire from the telephone or automatic telephone answering device side to the data terminal device side.