JPH0319458A - Automatic dialer - Google Patents

Abstract

PURPOSE:To improve the operability by reading a dial signal corresponding to a dial number selected with a detection signal from a DT signal detector from a memory and sending the signal to a line. CONSTITUTION:An opposite telephone number is selected by a switch means 11 and when a communication terminal equipment 30 hooks off, a DC current is sent from an exchange via a line 20 to close a DC loop and a DT signal is sent from the exchange. The DT signal is detected by a DT signal detector 5, which outputs a detection signal and the output is inputted to a dial signal memory means 8, a dial signal of a telephone number selected by a switch means 10 is read, sent to a dial signal transmission circuit 9 and the dial signal is sent to the line 20 via the circuit 9. Thus, in the case of intermittent communication to one and same opposite party, the callout dialing is not desired and the efficiency is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is capable of automatically transmitting the dial signal of the other party to the line by simply off-hooking the communication terminal when the number of communications with a specific party is large. , relates to an automatic dialer that can make calls.

[Conventional technology]

BACKGROUND ART Conventionally, when a communication terminal such as a telephone is used, a line connection is established by turning a dial (dial pulse line) or pressing a dial button (fush button line) to communicate with a partner. In addition, there are also terminals equipped with one-touch dialing or speed dialing functions.
Line connections are made by simplifying dialing operations.

[Problem to be solved by the invention]

However, with all of the above-mentioned conventional terminals, after the user goes off-hook, the user dials after confirming the dial tone (hereinafter referred to as DT signal) sent from the exchange, or dials a predetermined speed dial number. A one-touch button connects the line. However, if you have registered the phone numbers of multiple parties, and you often communicate with a particular party, it is cumbersome to perform the above operation every time, and there is a risk of erroneous operation. there were.

If you have a large number of communications with a specific party, there is a form of communication using a dedicated line that can eliminate dialing operations, but in this case, you will have to pay a leased line contract fee, so the number of communications will not be as high. There is a problem that it is disadvantageous if there are not many communications.The present invention uses a general subscriber line (hereinafter referred to as the line) and only goes off-hook when the number of communications with a specific party is large. To provide a device that can automatically send a dial signal for a specific party and establish a line connection without dialing.

[Means to solve the problem]

In order to solve the above-mentioned problem, the present invention detects that when a communication terminal connected to a line goes off-hook, a DC loop is closed between it and the exchange and a DT signal is sent. a DT signal detector that outputs a detection signal having a predetermined pulse width; a dial signal memory means for writing and reading dial signals corresponding to a plurality of specific dial numbers in advance; a switch means for selecting a dial number corresponding to a plurality of dial signals; and when one of the specific dial numbers is selected by the switch means and a detection signal is output from the DT signal detector, the selected dial number is selected. The automatic dial transmitter is constructed with a dial signal escape circuit that reads a dial signal corresponding to a dial number from the dial signal memory means and sends the dial signal to the line.

In addition, the present invention further provides for the automatic dial transmitter to be configured to close the DC loop in consideration of malfunctions caused by pseudo signals such as continuous noise that occurs extremely rarely or crosstalk of voices close to the dial tone frequency (400 Hz). detection of
By adding a DC Rougue detector that outputs a detection signal having a predetermined pulse width, and an ω circuit that obtains the logical product of the detection signal of this detector and the detection signal of the DT signal detector,
The dial signal stored in the dial signal memory means is read out by the output of the ND circuit, and the dial signal is sent to the line.

[For production]

Since the automatic dial transmitter of the present invention is configured as described above, the communication terminal user can select one of the dial signals of a plurality of parties stored in the dial signal memory means in advance, and then When you turn off the phone, a dial signal for a specific party is automatically sent, so you can call the other party without having to dial each time you communicate.

〔Example〕

FIG. 1 is a block diagram of an embodiment of the present invention. In FIG. 1, J is the automatic dial transmitter of the present invention, 2 connection terminals, 3Fi communication terminal connection terminals, 4 contacts for key/zot connection, 5 DT signal detector, 8 A dial signal memory means, 9 a dial signal sending circuit, and 10 a switch means. 2θ is a line connected to the exchange, and is connected to line connection terminal 2. A communication terminal 30 such as a telephone is connected to the communication terminal connection terminal 3. 40 is a key and is used by inserting it into the contact point 4 at any time.

When the communication terminal 30 is off-hook, the DT signal detection circuit 5 closes a DC loop with the exchange via the line 20 and then sends out the DT signal. Outputs a nosolus of a given width as . The 1,000-stage dial signal memory 8 is a memory in which dial signals corresponding to the dial numbers of a plurality of specific parties are stored in advance, and any one dial signal can be selected by turning the switch 1,000 stages 1θ.

When the dial signal memory means 8 receives the detection signal output from the DT signal detector, the dial signal memory means 8 operates the switch 1
Read out the dial signal selected by 0 [7, The dial signal is sent to the line 20 via the dial signal sending circuit 9.
sent to.

To use the automatic dialer of the present invention, first insert the keypad 40 into the contact point 4, set the switch 10 to the predetermined position, and press the keypad 4θ to select the specific party to be registered at that position. Input the telephone number (7. Write the dial signal corresponding to the telephone number to the dial signal memory 1,000 stage 8. If you want to register the telephone numbers of multiple parties, change the switch 1,000 stage 10 in sequence and input the telephone number of the other party. do.

After completing the above operations, the keypad 40 is removed from the contacts 4, and the person in charge stores the keypad 40. It goes without saying that the dial signal written by the keynote 40 can be rewritten in the same way as the speed dial of a normal telephone.

After performing the preparation operations in this way, select the telephone number of the person with whom you wish to communicate on the switch 11, and press the communication terminal 30.
When the telephone goes off-hook, a DC current is sent from the exchange through the line 2θ to close the DC loop, and then a DT signal is sent from the exchange. The M signal detector 5 detects this DT signal and outputs a detection signal, and this output is input to the dial signal memory 1,000 stages 8, and the dial signal of the telephone number selected by the switch 1,000 stages 10 is read out. The dial signal is sent to the dial signal sending circuit 9, and the dial signal is sent to the line 2θ via the circuit 9. The exchange receives this dial signal and connects the line.

Note that dial signal memo FIG. 2 is a configuration diagram of another embodiment of the present invention.

The embodiment shown in FIG. 2 is obtained by adding a DC loop detection circuit 6 and an AND circuit 7 to the embodiment shown in FIG.

The DC loop detector 6 detects that a DC loop is closed between the communication terminal 30 and the exchange via the line 20 when the communication terminal 30 goes off-hook, and detects that the DC loop is closed. Then, a pulse with a predetermined width is output as a detection signal. The AND circuit 7 reads out the selected dial signal from the 1,000-stage dial signal memory 8 by logical product of the detection signal and the detection signal of the DT signal detector 5. is similar to the embodiment shown in FIG. In this way, the DC loop detector 6
If the detection signal output of the detector 6 and the detection signal output of the DT signal detector 5 are ANDed,
The DT signal detector 5 alone can detect extremely rare continuous noise or dial tone frequency (400H).
When a pseudo signal such as voice crosstalk similar to z) enters the line, the DT signal detector 5 operates and outputs a detection signal.
Even if the dialer is turned on, there is no detection signal from the DC loop detector, so the automatic dialer will not malfunction.

〔Effect of the invention〕

As explained in detail above, according to the present invention, when communicating using a communication terminal such as a telephone, a specific person is selected from a plurality of parties registered in advance, and the user simply goes off-hook. You can automatically call the selected party, so if you communicate with the same party intermittently,
This has the effect of improving efficiency by eliminating the need for dial operations for making calls, and is also expected to have the effect of preventing erroneous J connections due to pressing the wrong button in the case of speed dialing and one-touch Q-dial systems.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of another embodiment of the present invention. 1... Automatic dial transmitter, 2... Line connection terminal,
3...Communication terminal connection terminal, 4...Contact, 5...
DT signal detector, 6... DC loop detector, 7...
AND circuit, 8...Dial signal memory means, 9...
- Dial signal sending circuit, 10... switch means, 2
0...Line, 30...Communication terminal, 40...Key i9 ct.

Claims (1)

[Claims] 1. DT signal detection that is connected between a subscriber line and a communication terminal, detects a dial tone sent from an exchange by off-hooking the communication terminal, and outputs a detection signal. a dial signal memory means for writing and reading dial signals corresponding to a plurality of specific dial numbers in advance; and a switch means for selecting a dial number corresponding to a plurality of dial signals stored in the dial signal memory means. When one of the specific dial numbers is selected by the switch means and a detection signal is output from the DT signal detector, a dial signal corresponding to the selected dial number is output from the dial signal memory means. 1. An automatic dial transmitter comprising: a dial signal sending circuit for reading out the dial signal and sending the dial signal to the line. 2. The automatic dial transmitter according to claim 1, detecting the closure of the DC loop when the communication terminal is off-hook;
It is characterized by being constructed by adding a DC loop detector that outputs a detection signal, and an AND circuit that performs a logical product of the detection signal of the DC loop detector and the detection signal of the DT signal detector. automatic dialer.