JPH0522477A - Public telephone set - Google Patents

Abstract

PURPOSE:To continue the talking as it is by depositting a coin or loading a pre-paid card again before on-hook even when the talking call unit by a coin or a pre-paid card is expired. CONSTITUTION:The telephone set is provided with a central control section (CPU) 9 limiting the entire public telephone set and a storage section (HEM) 3 storing tentatively a telephone number dialed by the user and when the re- deposit of a coin is detected before on-hook after the end of talking by the CPU 9, the CPU 9 reads the telephone number stored in the MEM 3 at the time detection to control a dialing section (OSC) 4 to send a dial signal to a line 11 again.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to payphones.

[0002]

2. Description of the Related Art In a conventional public telephone, a reminder sound is sent to the caller for a fixed amount of coins or a prepaid card to be charged, or before the basic call time, to continue the call. Is urged to insert a coin or a new prepaid card. If no coin or a new prepaid card is inserted, the connection with the line is forcibly disconnected.

[0003]

In the above-mentioned conventional public telephone, the coin of the calling party or a new prepaid card must be reinserted after the reminder sound is heard, and the called party telephone number must be manually operated again. However, there is a drawback in that it is very troublesome to operate and it is necessary to make a call while always keeping an eye on the call time.

[0004]

The public telephone of the present invention comprises:
A storage unit that temporarily stores the called party telephone number input from the dial unit, and a detection unit that detects the re-insertion of the coin or the second prepaid card before the on-hook after the end of the call frequency of the coin or the prepaid card amount. And a dial transmission unit for redialing the called party telephone number temporarily stored in the description unit by the detection of the detection unit.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

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

In FIG. 1, in this embodiment, a coin detecting unit (hereinafter referred to as DET) 1 for detecting coins inserted from a coin insertion slot and the number of coins, and a dial button for inputting a telephone number (hereinafter referred to as DL). ) 2, and a storage unit (hereinafter referred to as MEM) 3 for temporarily storing the telephone number input from DL2,
A clock circuit (hereinafter referred to as TIM) 6 for transmitting a time signal or the like required for the call frequency, a dial transmission unit (hereinafter referred to as OSC) 4 for converting a telephone number input from the DL 2 into a dial signal and transmitting the dial signal. A call circuit (hereinafter referred to as SPC) 5 that sends and receives a voice signal and the like through the line 11, and a reminder that sends a reminder sound to the caller at a fixed time or a basic call time at the end of the frequency of the inserted coin amount. Sound transmission unit (hereinafter AUD
7), a hook switch (hereinafter referred to as HS) 8 for sending on / off signals of a handset (not shown), and a central control unit (hereinafter referred to as CPU) 9 for controlling the entire embodiment. Then configured.

Next, the operation of this embodiment will be described.

First, the caller picks up the handset to turn on the HS8, and an on-hook signal is sent to the CPU9.

When a coin is inserted from the coin slot, DET
The coin insertion is detected at 1 and a detection signal is sent from the DET 1 to the CPU 9. As a result, the CPU 9 controls the SPC 5 to form a direct current loop on the line 11 so that the calling party hears a dial tone via the handset and the calling party can dial.

When the calling party dials the called party telephone number from DL2, the dial data is stored in the MEM3 under the control of the CPU 9, and the OSC4 to the SPC are sequentially stored.
The telephone number of the called party is sent as a dial signal to the line 11 through the line 5. Thereafter, the called party answers and the calling party enters the talking state.

A reminder sound is sent from the AUD 7 to the caller through the SPC 5 and the handset under the control of the CPU 9 before a fixed time or a basic call time before the end of the call frequency corresponding to the coin amount inserted.

After that, when the CPU 9 receives the on-hook signal from the HS 8, the CPU 9 returns to the initial state and has a new call request, and at the same time, the line 11 is sent via the SPC 5.
And disconnect the DC loop.

When the re-insertion of coins is not detected after sending the reminder sound, the CPU 9 sends the line 11 via the SPC 5.
Although the DC loop is disconnected, when the caller reinserts the coin before the on-hook, the DET 1 sends a coin reinsertion detection signal to the CPU 9. The CPU determines that the caller has requested reconnection, and forms a DC loop again for the line 11 via the SPC 5. After that, when a certain time elapses, the CPU 9 controls the dial data of the called telephone number temporarily stored in the MEM 3 to be read out and sent to the OSC 4, converted into a dial signal and sent out through the line 11. .

Subsequent operations are the same as those after the first dial signal is transmitted.

Although the present embodiment has been described with respect to a coin-insertion type public telephone, it can be similarly analogized in the case of a public telephone using a prepaid card.

[0017]

As described above, according to the present invention, the called party's telephone number input from the dial section is temporarily stored in the storage section, and after the call frequency corresponding to the inserted coin or the amount of the prepaid card ends, before the on-hook. When the reinsertion of the coin or the second prepaid card is detected, the called party's telephone number temporarily stored in the storage section is retransmitted, so that it is possible to easily reconnect with the other party without dialing manually. As a result, the calling party has the effect of making a call without worrying about the call time.

[Brief description of drawings]

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

[Explanation of symbols]

 1 coin detection part (DET) 2 dial button (DL) 3 storage part (MEM) 4 dial transmission part (OSC) 5 communication circuit (SPC) 6 clock circuit (TIM) 7 reminder sound transmission part (AUD) 8 hook switch ( HS) 9 Central control unit (CPU) 11 lines

Claims (1)

Claims: 1. A storage unit for temporarily storing a called party telephone number input from a dial unit and a coin or a coin before the on-hook after the end of the insertion effect or the call frequency corresponding to the amount of the prepaid card. 2. A detection unit for detecting re-insertion of the prepaid card, and a dial transmission unit for redialing the previous called telephone number temporarily stored in the storage unit by the detection of the detection unit. Pay phone.