JPH01189273A - Private line backup device - Google Patents

Abstract

PURPOSE:To execute a private line backup without needing the line selection control information transmitting part of a center side backup device and to simplify and miniaturize the center side backup device by using a voice signal as line selection control information. CONSTITUTION:When a private line 7 is made into a trouble, an operator at a center side switches two relays of a switching line switching part 6 to telephone sets 3 and 4 sides, respectively, a switching control part 15 at a terminal side is called by the dial operation of the telephone set 3, and next, the same operation is executed by the telephone set 4. Next, from the telephone set 3 or 4, the line selection control information is transmitted in the voice. The information received with the voice signal is recognized by the switching control part 15 at the terminal side, and a line connected from a terminal side modem 13 in a terminal side private line switching part 14 to the private line 7 is switched to a switching line side. At the center side, the line connected from a center side modem 2 in a private line switching part 5 to the private line 7 is switched to the switching line switching part 6 side, and the switching line switching part 6 is switched to the private line switching part 5 side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a backup device in case of failure of a dedicated line.

[Conventional technology]

Conventionally, this type of backup device has required a line selection control information transmitter for encoding and modulating line selection control information input by an investigator on the center side and transmitting the encoded information to the terminal side.

[Problem that the invention seeks to solve]

The present invention provides a simple and compact dedicated line backup device that eliminates the need for a line selection control information transmitter of a center side device by transmitting line selection control information from a center side telephone using the operator's voice. It is something.

[Means for solving problems]

The device of the present invention is a system for switching any dedicated line to a switched line among a plurality of dedicated lines connecting a center and a terminal, and includes means for transmitting line selection control information from the center side in the form of an audio signal; means for receiving a signal on a terminal side via a switched line; means for recognizing the received voice signal and obtaining the line selection control information; and converting the dedicated line designated by the line selection control information into a switched line. and switching means.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIG.

Reference numeral 1 denotes a center side backup device, which includes a dedicated line switching unit 5 and a switched line switching unit 6. 3 and 4 are telephones, 2 is a center side modem, 7 to 9 are dedicated lines (4-wire type), 10
and 11 represent a switching device.

Reference numeral 12 denotes a terminal side backup device, which includes a dedicated line switching section 14 and a switching control section 15. 13 represents a terminal side modem device. In this embodiment, a case will be described in which one of three four-wire dedicated lines is switched to a backup line (two two-wire lines).

For example, if the dedicated line 7 becomes a failure, the operator at the center switches the two relays of the switched line switching section 6 to the telephones 3 and 4, respectively.

Next, by dialing the telephone 3, the switching control section 15 on the terminal side is called. The switching control unit 15 detects an incoming call and returns an incoming tone. Subsequently, the same operation is performed using the telephone 4. With the above steps, two backup switching lines are configured.

Next, the operator transmits line selection control information by voice from the telephone 3 or 4. For example, if the line numbers of dedicated lines 7 to 9 are 1 to 3, respectively, and these are used as line selection control information, when switching the dedicated line 7, telephone 3
Or the operator says "1" from 4. The switching control unit 15 on the terminal side recognizes the information received in the form of an audio signal, and switches the line connected from the terminal side modem 13 to the dedicated line 7 in the terminal side dedicated line switching unit 14 to the switched line 7 side.

On the center side, the line connected from the center-side modem 2 to the dedicated line 7 in the dedicated line switching unit 5 is switched to the switched line switching unit 6 side, and the switched line switching unit 6 is switched to the dedicated line switching unit 5 side.

This completes the line backup operation. Backup restoration is performed when the switching control unit 15 detects the modulated signal from the center side modulation/demodulation device 2 and there is no signal for a certain period of time or more.
This can be done by restoring a backup.

〔Effect of the invention〕

As explained above, the present invention makes it possible to perform dedicated line backup without requiring a line selection control information transmitter of the center side backup device by using audio signals as line selection control information. This has the effect that the center side backup device is simple and compact.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an embodiment of the present invention. ■・・・・・・Center side backup device, 2・・・・
...Center side modem, 3, 4...Telephone,
5... Dedicated line switching unit, 6... Switched line switching unit, 7-9... Dedicated line, 10.11.
... Exchange device, 12 ... Terminal side backup device, 13 ... Terminal side modulation/demodulation device, 14.
... Dedicated line switching unit, 15... Switching control unit. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] In a system for switching any dedicated line to a switched line among a plurality of dedicated lines connecting a center and a terminal, there is provided a means for transmitting line selection control information from the center side as an audio signal, and a means for transmitting the audio signal via the switched line. means for receiving the voice signal on the terminal side; means for recognizing the received voice signal and obtaining the line selection control information; and means for switching a dedicated line designated by the line selection control information to a switched line. A dedicated line backup device characterized by: