JPH0622019A - Telephone device - Google Patents

Abstract

(57) [Abstract] [Purpose] After the line is connected to the DP line, the PB signal can be automatically switched and the PB signal can be transmitted, and the service similar to the PB line can be used through the DP line. [Configuration] A DP exchange is connected through a DP dial signal output circuit 7 and a hook switch 1, or is connected to a destination telephone through the exchange. Next, the DTMF signal transmission circuit 6 is selected by the connection switch 12 under the control of the control unit 5, and an instruction from the 3 × 4 keyboard 4 and a PB of the DTMF for operation are given.
Signals are transmitted from the office lines L1 and L2 so that services such as pagers with a message display function can be used in the same manner as PB lines.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a dial pulse (D
The present invention relates to a telephone device capable of transmitting a bush button (PB) signal after connecting a line at P).

[0002]

2. Description of the Related Art Conventionally, there are a dial pulse (DP) type shared telephone for indicating a telephone number by a rotary dial and a push button (PB) type shared telephone for indicating a telephone number by a push button and transmitting a PB signal of a DTMF signal. It is used.

In this shared telephone, the station line (L
DP depending on the type of DP line or PB line (1, L2)
The setting switch provided in the shared telephone is used by switching so that the dial pulse signal is sent to the type line and the DTMF PB signal is sent to the PB type line.

[0004]

By the way, in the PB formula,
This telephone is capable of transmitting a PB signal by pressing a push button to an exchange station connected through a central office line or a destination telephone connected through the exchange station, and is well known as a pager with a message display function. You can use services that use lines.

However, in the DP system, the rotary dial for indicating the telephone number is not used after the telephone number is transmitted, and the dial pulse signal cannot be transmitted to the connected exchange and the telephone of the other party. That is, there is a problem that services using a telephone line such as a pager with a message display function cannot be used.

The present invention solves the problems in the prior art as described above. It is possible to automatically switch the PB signal after the line connection with the DP type line and send the PB signal. The purpose is to provide an excellent telephone device that can be used.

[0007]

In order to achieve the above object, a telephone device of the present invention comprises a DP signal transmitting means for transmitting a dial pulse signal, a PB signal transmitting means for transmitting a DTMF push button signal. Push button signal,
Selecting means for selecting one of the dial pulse signals, and DP
Voltage reversal detection means for transmitting a dial pulse signal from the signal transmission means to the public line to detect voltage reversal for billing from the connected exchange, and polarity after the line connection by controlling the DP signal transmission means The control means controls the selecting means by detecting the inversion signal to automatically select the PB signal sending means from the DP signal sending means and send the push button signal.

[0008]

With such a construction, in the telephone device of the present invention, the DP signal transmitting means is controlled to control the selecting means by detecting the polarity inversion signal after the line connection, and the DP signal transmitting means to the PB signal transmitting means. Is automatically selected and control is performed so that a push button signal can be transmitted, and a DTMF PB signal is transmitted to the exchange station and the destination telephone by an instruction or operation from the push button.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a telephone device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the configuration of the embodiment. In FIG. 1, L1 is the plus (+) side and L2 is the minus (-) side.
This is the local station line. Reference numeral 1 is a hook switch that is switched when the handset is picked up or put on, and the like. Reference numeral 2 is a call signal detection circuit that detects a call signal when a call arrives through the office lines L1 and L2. 3 is a speaker that sounds a call when a call arrives. . Furthermore, 4 has 3 pushbuttons in 4 rows
3 × 4 dial keyboards arranged in a row, 5 is a control unit (corresponding to the control means in the claims), and 6 is a DTMF
DTMF signal transmission circuit for transmitting the PB signal, 7 is 3 ×
4 DP dial signal output circuit corresponding to a telephone number operated and instructed from the dial keyboard 4 and sending a DP signal by interruption, 8 is a HYB circuit, 9 is a receiver which is a speaker, and 10 is a transmitter which is a microphone. .

Reference numeral 11 is a voltage inversion detection diode (corresponding to voltage inversion detection means in the claims), 12 is a connection switch for connecting the controller 5 and the DTMF signal transmission circuit 6, and 13 is a DP dial signal output circuit 7. It is a connection switch for connecting to the control unit 5.

3 × 4 dial keyboard 4 and DP
The dial signal output circuit 7 corresponds to the DP signal transmitting means in the claims. Also, 3x4 dial keyboard 4
And the DTMF signal transmitting circuit 6 are the DTM in the claims.
Corresponding to the F dial signal transmission means, the connection switch 12,
Reference numeral 13 corresponds to selecting means in the claims.

Next, the operation of the configuration of this embodiment will be described. FIG. 2 shows a processing procedure in this operation. In FIG. 2, the hook switch 1 for accepting an incoming call is determined to be off (step (indicated by S in the figure) 10). In the case of Yes in which it is determined that the hook switch 1 is off in step 1, the ringing signal detected by the ringing signal detection circuit 2 at the time of incoming call is blown from the speaker 3 (step 11).

Then, the hook switch 1 is turned on.
Next (step 12), the call is established (step 1)
3).

Then, D from the DTMF signal transmission circuit 6
It becomes possible to start transmitting the PB signal of TMF (step 14).

After this, the call ends, and the hook switch 1 is turned off at the end of the call (step 15), and the processing from step 10 is started.

Then, in step 1, it is determined whether the hook switch 1 is off. That is, it is determined whether or not the call is for making a call. If the answer is No (ON), the connection switch 13 is turned on (ON) under the control of the control unit 5 to set the DP type (step 1).
6).

Next, when a telephone number is designated through the 3 × 4 keyboard 4, pushed and dialed, the switch of the DP dial signal output circuit 7 is turned on and off under the control of the control unit 5.
× 4 DP corresponding to the telephone number specified from the keyboard 4
Send a signal.

The DP signal connects the destination telephones through the office lines L1 and L2 and the exchange station, and the voltage polarity of the station lines L1 and L2 from the exchange station is reversed by the response signal (step 17). This voltage polarity reversal causes the voltage reversal detection diode 11 to become conductive, and the control unit 5 identifies this conduction and proceeds to the next step 13 to set the communication state. After this, the processing from step 14 onward is performed and DT
The PB signal can be transmitted by the MF method.

As described above, when making a call, steps 10, 16, 17 to 13, and 1 in FIG.
According to the processing procedure of 4 and 15, when dialed by the DP method and connected to the exchange station or the destination telephone through the exchange station,
The DP type automatically switches to the PB type, and after that, D
The PB signal from the TMF signal transmission circuit 6 is transmitted to the office lines L1 and L2.
Can be sent to the exchange or the destination telephone. By sending this PB signal, services such as a pager with a message display function can be used on the DP-type station lines L1 and L2 in the same manner as the PB-type line.

Even when a call is received and answered, the DP type is automatically switched to the PB type by the incoming call signal as shown in the processing procedure of steps 10 to 15 in FIG. The PB signal can be transmitted from the DTMF signal transmission circuit 6 by instructing and operating the × 4 keyboard 4, and services such as a pager with a message display function can be used.

[0022]

As is apparent from the above description, in the telephone device of the present invention, the DP signal sending means is controlled to control the selecting means by detecting the polarity inversion signal after line connection.
Since the PB signal sending means is automatically selected from the signal sending means and the control is performed so that the push button signal can be sent, the PB signal can be sent automatically by switching after the line connection with the DP type line. The same effect as the PB line can be provided through the DP line.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a telephone device of the present invention.

FIG. 2 is a flow chart for explaining the operation of the embodiment and showing the processing procedure thereof.

[Explanation of symbols]

 1 hook switch 2 call signal detection circuit 3 speaker 4 3x4 dial keyboard 5 control unit 6 DTMF signal transmission circuit 7 DP dial signal output circuit 8 HYB circuit 9 handset 10 transmitter 11 voltage reversal detection diode 12, 13 connection switch L1 , L2 station line

Claims (1)

[Claims] 1. A DP signal transmitting means for transmitting a dial pulse signal, a PB signal transmitting means for transmitting a DTMF push button signal, a selecting means for selecting one of the push button signal and the dial pulse signal, and the DP. Voltage reversal detection means for transmitting a dial pulse signal from the signal transmission means to the public line to detect a voltage reversal for billing from the connected exchange, and DP signal transmission means for controlling the voltage reversal means, and after the line connection, A telephone device comprising: control means for controlling the selecting means by detecting a polarity inversion signal so as to automatically select the PB signal sending means from the DP signal sending means and send a push button signal.