JPS62254559A - Telephone set for both dp/mf - Google Patents

Abstract

PURPOSE:To easily utilize a new system by providing a DP signal sending circuit and a MF signal sending circuit to apply time-division control to a dial signal control circuit without imposing limitation on the line connection by the kind of exchanges. CONSTITUTION:The DP signal sending circuit 3 converting a dial signal into a pulse signal and sending the result based on the dial operation, the MF signal sending circuit 4 converting the dial signal into a multi-frequency signal and sending the result, and the dial signal control circuit 2 applying time-division drive conrol to the circuits 4 and 3, are provided. As the control sequence of the dial signal control circuit 2, the DP signal is sent earlier and then the MF signal is sent through time division, but it is equally well that the MF signal is sent earlier and then the DP signal is sent conversely. The certainty of a series of operations is enhanced by repeating frequently them.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a method for converting a dial signal generated by a dial operation into a pulse signal (hereinafter abbreviated as DP multiplied signal) or a multifrequency signal (hereinafter referred to as MF signal).
This invention relates to a dual-purpose DP/MF telephone that converts into a double signal (abbreviated as "double signal") and makes a call.

(Prior art) In the conventional telephone line, a general telephone, that is, a DP converts a dial signal from a dial operation into a DP signal and makes a call.
Connect the telephone line from the MF telephone to the DP SxS exchange, etc., and connect the telephone line from the MF telephone, which converts the dial signal from the dial operation to an MF signal and sends it, to the MF crossbar exchange, etc. Each device uses its own method to connect or exchange lines.

(Problems to be Solved by the Invention) As described above, it is necessary to connect a DP switch to a DP telephone, and a MF switch to a MF telephone, which imposes restrictions on line connections. There was a problem.

In addition, in recent years, research and development of various information communication systems such as character and graphic information communication systems or data communication using telephone lines has been promoted, and when using such new systems, it is necessary to request MF damage signals from telephones. Therefore, there was a problem in that the new system could not be used with conventional DP telephones.

The present invention has been made in view of the above problems, and an object thereof is to provide a dual-purpose DP/MF telephone that can utilize a new system without being restricted by line connections depending on the type of exchange. .

(Means for Solving the Problems) In order to solve the above-mentioned problems and achieve the above objects, the present invention provides a dual-purpose DP/MF telephone that converts a dial signal based on a dial operation into a pulse signal. Send D
A P signal sending circuit, an MF signal sending circuit that converts the dial signal into a multi-frequency signal and sends it out, and a dial signal control circuit that drives and controls the MF signal sending circuit and the DP signal sending circuit in a time-sharing manner. It is characterized by the following.

(Example) FIG. 1 is a block diagram showing one embodiment of the present invention.

First, to explain the configuration, 1 is a dial storage circuit,
It is connected to a dial operation unit via a signal line a, receives a dial signal based on a dial operation by a telephone user, and stores the dial signal in a built-in storage circuit. When this dial signal is input, a signal indicating that the dial signal has been input is transmitted to the dial signal control circuit 2 via the signal line. The dial signal control circuit 2 connects the signal line C
The DP signal sending circuit 3 is connected via the signal line d, and the MF signal sending circuit 4 is connected via the signal line d, and the MF signal sending circuit 4 and the DP signal sending circuit 3 are driven and controlled in a time-sharing manner. The DP signal sending circuit 3 converts the dial signal into a DP signal based on a control command from the dial signal control circuit 2, and sends out the converted signal. Further, the MF signal sending circuit 4 converts the dial signal into an MF multiplied signal based on a control command from the dial signal control circuit 2, and sends out the converted signal. 5 is a line termination circuit that serves as an interface with the converter, and the line termination circuit 5
A DP signal sending circuit 3 is connected to the signal line e, and an MF signal sending circuit 4 is connected to the signal line f.
The DP multiplied signal input in a time-division manner is sent to the corresponding exchange via the MF multiplied signal signal line g.

FIG. 2 is a flowchart showing the control sequence of the dial signal control circuit 20.

The operation of the embodiment of the present invention shown in FIG. 1 will be explained with reference to FIG. When a telephone user performs a dial operation and a dial signal is input into dial storage circuit 1, step 1
Then, data reading operation is started based on a signal from the dial storage circuit 1 indicating that a dial signal has been input. Proceeding from step 2 to step 3, the dial signal stored in the dial storage circuit 1 is read, and this dial signal is output to the DP signal sending circuit 3 to instruct the sending of the DP multiplied signal. In step 4, it is monitored whether or not the DP double signal transmission is completed. When the DP double signal transmission is completed, the process proceeds from step 4 to step 5, where the dial signal is output to the MF signal transmission circuit 3 and the MF double signal is transmitted. command. In step 6, it is monitored whether or not the MF multiplied signal transmission is completed, and the signal is sent back to the MF signal control circuit 2, and the process returns from step 6 to step 1 to be set to the initial state.

In the above embodiment, as a control sequence of the dial signal control circuit 2, the DP multiplied signal is sent to the destination by time division.
Although the configuration has been described in which the MF multiplied signal is then sent out, it is also possible to send out the MF multiplied signal first and then the DP multiplied signal. Moreover, reliability can be improved by repeating this series of operations multiple times.

Further, in the embodiment shown in FIG. 1, the dial signal is outputted to the DP signal sending circuit 3 and the MF signal sending circuit 4 in a time-sharing manner, that is, alternately to the DP signal sending circuit 3 and the MF signal sending circuit 4.
Although the configuration is configured to achieve time-sharing control with the F signal sending circuit 4, as another example, a dial signal is always given to the DP signal sending circuit 3 and the MF signal sending circuit 4, and the dial signal is transmitted from the dial signal control circuit 2. The DP signal sending circuit 3 and the MF signal sending circuit 4 are started and stopped in a time-sharing manner based on the time-sharing control timing signal (effects of the invention) As described above, according to the present invention, It is equipped with a DP signal sending circuit that converts a dial signal based on a dial operation into a pulse signal and sends it out, and an MF signal sending circuit that converts the dial signal into a multi-frequency signal and sends it out, and is time-sharing from the dial signal control circuit. By controlling the time-division transmission of the DP double signal and MF double signal, the new system can be easily used without restrictions on line connections even if the type of switch is different. Effects can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing a control sequence. DESCRIPTION OF SYMBOLS 1...Dial storage circuit, 2...Dial signal control circuit, 3...DP signal sending circuit, 4...MF signal sending circuit, 5...Line termination circuit. Agent Patent Attorney Shinsuke Honjo Figure 2

Claims (1)

[Claims] a DP signal sending circuit that converts a dial signal based on a dial operation into a pulse signal and sends it; an MF signal sending circuit that converts the dial signal into a multifrequency signal and sends it;
1. A dual-purpose DP/MF telephone characterized by comprising a dial signal control circuit for time-divisionally driving and controlling an F signal sending circuit and a DP signal sending circuit.