JPH01212959A - Private telephone line switching system - Google Patents

Abstract

PURPOSE:To effectively switch a line in a short time by using more than eleven successive dial pulses when it is required to switch a private telephone line according to a purpose except a toll dial state. CONSTITUTION:When it is required to use the private telephone line in a terminal equipment 3, the terminal equipment 3 operates a switching signal transmitter 4 irrespective of the use or the unuse of the private telephone line. The switching signal transmitter 4 operates a dial pulse generator 6 to transmit more than eleven dial pulses of the switching signals to an opposite station. A switching receiver 5 analyzes the received dial pulses by a dial pulse receiver 7, recognizes that they are dial pulses for a preset switching signal and operates a switching coil 10. Thereby, a private telephone line trunk A and a private telephone line trunk 12 are separated from the private telephone line to connect the terminal equipment 3 to a terminal equipment 13.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an activation method for switching from a toll dial state to a terminal device facing state in a dedicated telephone line system that switches between a toll dial connected state and a terminal device facing state. Regarding.

[Conventional technology]

Conventionally, in the activation method for switching the dedicated telephone relay plane III, a method using a voice signal and a method using a dial pulse are used as the activation control signal. Furthermore, methods using audio signals include a method in which the control signal is sent by band division, and a method in which two types of audio signals are sent as the control signal, but the former method has a narrow band, resulting in a decrease in sound quality and failure of the modem signal. The latter also had the disadvantage of malfunctioning due to voice or modem signals. Further, the system using dial pulses is a system in which 1 to 10 dial pulses are sent and received for one or more digits and switched, but it is affected by the numbering plan of the exchange connected to the dedicated telephone line. In addition, there was a problem in which incorrect switching could occur due to a malicious operation by a user of the toll dial.

However, recently, due to the increase in the number of modem terminals such as fax machines, and the complexity of toll dial number plans.

Conventional switching methods cannot be used, and emergency calls and meetings4
As the number of telephone calls increases, there is a need for a reliable dedicated telephone line switching system.

[Popular Problems to be Solved by the Invention J] The purpose of the present invention is to use 11 or more dial pulses, which cannot be used with toll dials, as switching control signals in such cases to switch the number of the exchange connected to the dedicated telephone line. To provide reliable line switching without being affected by plans, with good voice quality, and without voice malfunctions.

Another object of the present invention is that when a dedicated telephone line is in use, the conventional dial pulse method sends out a control signal after the line is restored, whereas a dial pulse is sent out while the dedicated telephone line is in use. The purpose is to realize switching control in a short time and with an hour wheel configuration.

[Means to solve the problem]

Describing the configuration of the present invention, in a dedicated telephone line system that switches between a toll dial connection state and a terminal device facing state, the present invention changes the dedicated telephone line used in the toll dial state to a terminal device facing state. For this purpose, 11 or more specific dial pulses are sent out as switching signals regardless of whether the dedicated telephone line is in use or not, and during games, dial pulses are always counted and specific dial pulses are This is a dedicated telephone line switching system characterized by switching the dedicated telephone line to the terminal device and placing it in a state where the terminal device is facing the terminal device when the number reaches the maximum number.

[Effect]

When a dedicated telephone line is used for purposes other than toll dialing, the line can be reliably switched to a terminal device in a short time by using 11 or more consecutive dial pulses.

〔Example〕

The present invention will be described by way of embodiments with reference to the drawings.

FIG. 1 shows a block diagram of an exemplary apparatus for implementing the method of the present invention.

In FIG. 1, 1 is a telephone exchange, 2 is a dedicated trunk for controlling the toll dial state, 3 is a terminal device that uses a dedicated 1-talk WM in addition to the toll-dial state, and 4 is a dedicated IJt talk channel. 5 is a switching signal receiving device for transmitting a signal for switching M1; 5 is a switching signal receiving device for receiving the switching signal transmitted by 4; 6 is a switching signal receiving device for transmitting 11 or more consecutive dial pulses used as a switching signal; 7 is a dial pulse receiver for receiving the switching signal generated by 6; 8 is a switching contact for switching the line; 9 is a switch for switching the line after receiving the switching signal. 1o is a switching coil for operating the contacts of 9, and 11 is a telephone exchange.

Reference numeral 12 designates a trunk for a dedicated single-talk line for the purpose of controlling the toll dial state, and 13 represents a terminal device that uses the dedicated line for purposes other than the toll dial state.

The operation of the WIJ1 diagram is explained on the website. In the toll dial state, the dedicated telephone line trunk 2 controls the dedicated telephone line according to instructions from the telephone exchange 1. In this state, if it becomes necessary to use a dedicated telephone line for the terminal device 3, the terminal 117c! 13 operates the switching flight number sending device ea regardless of whether the dedicated telephone line is used or not. When activated by the terminal device 13, the switching signal transmitting device 4 operates the switching contact 8 and switches one side of the dedicated one-talk line. Next, the dial pulse generator 6 is operated to transmit 11 or more continuous dial pulses, which are switching signals, to the opposing station. The transmitted dial pulse is received by the switching signal receiving device 5 and the dedicated one-talk line trunk 12. The dial pulse received by the switching receiver M device f5&l is analyzed by the dial pulse receiver 37, and it is confirmed that it is the dial pulse for the switching signal set in advance 9L, and the switching coil 10 is operated. Switching coil 10
When activated, the switching contact 9 operates to switch the dedicated telephone line to the terminal device 13. This allows dedicated telephone line trunk A,! ：The telephone line trunk 12 for 8 is disconnected from the dedicated telephone line 91Il! Then, the terminal device 3 and the terminal device 13 are connected. In addition, a trunk 1 for a dedicated telephone line receives 11 or more consecutive dial pulses as a switching signal.
2 sends the dial count value to the telephone exchange 11, but since the 1-talk exchange 11 does not use a dial pulse of 1 to 10, it is not judged as a dial for line connection and is treated as an invalid dial, and the 4-talk exchange 11 sends the dial count value to the telephone exchange 11. This does not affect the replacement operation of the replacement rock 11 at all.

Next, the state when the switching signal receiving device 5 detects a toll dial state and receives a dial pulse for line connection will be described. In a toll dial state in which the terminal device its does not need to use a dedicated telephone line and one line is not switched, the dedicated telephone line trunk 2 sends out a dial pulse for line connection according to instructions from the telephone exchange 1. This dial pulse is received by the dedicated line trunk 12 and the switching signal amount (W device 5).The switching signal receiving device 5 analyzes the dial pulse received and measured by the dial pulse receiver 7. Since it does not match the dial pulse for switching key number, the switching coil 10 is not operated.The dial pulse receiver 7 is reset after a certain period of time has elapsed.

Prepare for reception of dark dial pulses. As above, A
The dial pulse for connecting the N line will not accidentally switch the dedicated telephone line.

〔Effect of the invention〕

As explained above, according to the present invention, when a computer telephone line is used for purposes other than toll-dial state (when it is necessary to switch lines, 11 or more consecutive dial pulses are used to ensure that the line can be switched in a short time). You can switch edges.

[Brief explanation of the drawing]

FIG. 1 shows a block diagram of an example of a device implementing the method of the present invention. 1... Telephone exchange, 2... Trunk for dedicated telephone circuit, 3... Terminal! ! placement, 4... switching signal transmitting device, 5
...Switching signal receiving device, 6...Dial pulse generator, 7...Dial pulse receiver, 8...Switching contact, 9...Switching contact, 10...Switching coil, 11...
・Telephone exchange ・12... Trunk for dedicated telephone circuit, 1
3...Terminal device.

Claims (1)

[Claims] In a dedicated telephone line system that is used by switching between a toll dial state and a terminal device facing state, the dedicated telephone line is switched to the terminal device by using 11 or more dial pulses as a means for switching the state, and the dedicated telephone line is switched to the terminal device facing state. A dedicated telephone line switching system featuring