JPH01125155A - Telephone line adaptor - Google Patents

Abstract

PURPOSE:To reject a wrong dial by ringing a bell based on a pass word from a sender side telephone set. CONSTITUTION:With a call signal coming from a telephone line, a bell detector 11 detects the signal and gives the result to a CPU 10. The CPU 10 connects the telephone line and outputs a signal of input request of a pass word at the sender side to a modulator 5 and a DEMF receiver 16 receives the pass word. The CPU 10 collates the received pass word with a data read from a memory 12 and connects an adder 18 when the pass word of the sender side terminal equipment is coincident with the number stored in a memory, the adder 18 is connected to ring a ringer 14 simultaneously. Thus, a talking with wrong dial is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a telephone line adapter that identifies the caller by means of a personal identification number when a telephone call is received.

(bl Conventional Technology-m) In the public telephone line system, by dialing a telephone number from a telephone, the telephone identified by that telephone number is unconditionally called, so there is no possibility of mistaken calls or prank calls. It was impossible to prevent telephone calls.In order to prevent this, in recent years, it has been possible to identify the sender by determining the PIN number of the transmitting telephone that sends a ring signal to the receiving telephone. Telephones have been put into practical use.

(C) Problems to be Solved by the Invention However, in order to install the above-mentioned telephone, it is necessary to remove the conventional telephone that has been used and install a new one, which is extremely uneconomical. There were drawbacks.

In view of the above-mentioned problems, an object of the present invention is to provide an inexpensive telephone line adapter that is inserted between a conventional telephone and a telephone line, and has a function of inquiring a PIN number. do.

Means for Solving the Td1 Problem The telephone line adapter of the present invention is a device inserted between a telephone line and a telephone set, and has a storage means for storing a password, and when a calling signal is received. , a means for connecting a line and transmitting a message requesting the input of a PIN number to the transmitting telephone, and a means for checking the received PIN number against the PIN number stored in the storage means, and sending a call based on the result of the inquiry. and means for connecting the telephone to a telephone line when the handset of the telephone is picked up.

(e) Operation In the telephone line adapter of the present invention, when the telephone to which this telephone line adapter is attached is on the receiving side, when it receives a ringing signal from another telephone, it connects the line and the other telephone on the transmitting side Sends a message requesting the input of a PIN number to the telephone. When the sender's telephone transmits the PIN number in the form of a tone signal, this PIN number is compared with a pre-stored PIN number. As a result of the verification, if the sent PIN number matches the stored PIN number, a bell will ring and the recipient's telephone will be called; if they do not match or the PIN number is not received, the line will be disconnected. Take measures such as making the receiving phone ring a weak ring. This makes it possible to distinguish whether the sender of the sender's telephone is a familiar person who has previously informed the user of the PIN number or another person. Furthermore, since this telephone line adapter is a device inserted between the telephone and the telephone line, there is no need to replace the telephone in order to request the PIN number of the sending telephone, which is economical.

(f) Embodiment FIG. 1 is a block diagram of a telephone line adapter which is an embodiment of the present invention. This telephone line adapter is inserted between the telephone line and telephone a2.

The bell detector 11 is connected to the telephone line via the switch 17.
A modulator 15 is connected via a switch 17 and an adder 18, and the bell detector 11 is connected to CPU10. Further, CPU10 is directly connected to the telephone line and further connected to modulation n15. The modulator 15 has D
An EMF receiver 16 is connected. The DEMF receiver 16 is also connected to the CPU and performs transmission and reception.

CPU I O has memory 12. Mode changeover switch 13
, ringer 14 are connected.

The entire control of this telephone line adapter is carried out by CPU10. When a calling signal is input from the telephone line, the bell detector 11 detects this signal and inputs it to the CPU10. C
After PU10 connects the telephone line (turns off the footer), it outputs a signal requesting input of the sender's PIN number to the modulator 15.
DEMF cash register.

- Receive the PIN number at the bar 16. The CPU 10 compares the received password with the data read from the memory 12, and if the transmitting phone's password matches the number stored in the memory, it connects the adder 18 and at the same time rings the ringer 14. , disconnects the ringer 14 when the receiver of the telephone 2 is hooked off. If the PIN number does not match, the mode selector switch 13, which performs two operations: ■turns off the switch 17, and ■makes the ringer 14 ring weakly, will switch to normal mode,! In the normal mode, it operates in the same way for all calls, just like an ordinary telephone.In the 0g1i different mode, it operates as described in (2) above. In the case of a specific mode, the operation described in (2) above is performed. This mode can be selected and set arbitrarily by the recipient depending on the time of day, etc. FIG. 2 is a flowchart showing the operation of the telephone line adapter. At nl and n2, it waits until there is a call from the transmitting side's telephone, or until it is hooked off for transmission. When hooked off at n2, the process proceeds to transmission operation (n3).

When there is a call from the transmitting telephone (nl), the mode is determined (n4), and if it is not the normal mode, the line is connected when the telephone rings three times (n5) (n6). Send a message requesting the input of the PIN number to the sending phone n7
), when the PIN is received (n8), check this PIN with the previously memorized PIN (n9), and if they match, ring bell A regardless of the mode (nil).
. Bell A is an action that causes a bell to ring strongly.

In normal mode, when there is a call (nl), the bell A is directly rung (nil). If you do not receive a PIN, or if the received PIN does not match the stored PIN, please check the mode.
), if in identification mode, rings a weak bell B (n12
), when in a specific mode, disconnects the line (n13) and rejects the call. Bell B is an operation of ringing a bell weakly.

When the bell is rung (nil, n12), a call letter g (n15-) is issued after waiting for hook-off.

(g) Effects of the Invention As described above, according to the telephone line adapter of the present invention, since the bell rings based on the PIN number of the transmitting telephone, unnecessary nuisance calls can be rejected, and calls cannot be received. It can provide distinctiveness. It also has the advantage of being economical, as there is no need to replace the telephone that was previously used, unlike the conventional telephone that discriminates PIN numbers. In addition, in this embodiment, an identification mode is provided, and even if the PIN numbers do not match, a system is adopted in which a bell is rung weakly to notify the user that there is a call.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone line adapter according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the control section of the telephone line adapter. 1-Telephone line adapter. Applicant NISMC Co., Ltd.

Claims (1)

[Claims] (1) A device inserted between a telephone line and a telephone set, which has a storage means for storing a PIN number, and when a call signal is received, connects the line and sends the PIN number to the transmitting telephone. means for transmitting a message requesting input; means for comparing the received password with a password stored in the storage means; and means for ringing a bell based on the verification result; and when the handset of the telephone is picked up. 1. A telephone line adapter comprising: a means for connecting a telephone and a telephone line;