JPS6037867A - Public telephone set using simple mobile radio - Google Patents

Abstract

PURPOSE:To realize simply charging registration only by a mobile body side by allowing the operator to monitor a reception signal to discriminate the response of an opposite party and to conduct charging registration by a switch. CONSTITUTION:A speaker switch 24 is connected by the command of a timer control circuit 21 at the same time when a dial signal relayed. when the response of opposite party is monitored through the connection of a line, after the monitor confirms the call, the operator gives a charge registration start command by depressing a charging start switch 13. Then a call unit charge is displayed on a charge display device 11. In this case, the speaker switch 24 is disconnected. Then the user uses handsets 34, 33 in place of the operator and makes communication with the called opposite party.

Description

[Detailed Description of the Invention] The present invention relates to a simple mobile radio public telephone device installed in a mobile object such as a car or a domestic vessel, and in particular, it is capable of realizing charge registration at a mobile station installed in the mobile object. This invention relates to public telephone equipment.

Conventionally, commercial coastal ships, marine telephones, and car telephones have dedicated exchanges, such as mobile telephone exchanges (mobile stations), and these exchanges and base stations are connected by radio waves and connected to the general telephone network. be done. The connection status of the wireless line necessary for billing is grasped by the car telephone exchange, and an interface with the general telephone network is established. It is equipped with a public trunk with arithmetic functions. The public trunk allows the connection status of the general telephone network to be grasped, and billing control for car public telephones is performed.

It detects when a fixed subscriber goes off-hook and sends a billing signal to the car public phone, and also detects disconnection of the wireless line and stops billing.

In response to such detailed payment operations on the base station side, a car public telephone equipped with a coin storage mechanism operates as follows. That is, (1) After confirming that the subscriber has inserted a coin, a dial signal is sent out and the connection operation is started.

■Receives the billing signal from the base station, stores coins, connects the communication path, and sends a coin storage confirmation signal to the base station.

■If coins are not inserted when the billing signal is received, the call path is cut off, a busy tone is sent to the receiver, and a call termination signal is sent to the base station.

For car public telephones that display the call charge, the connection operation is the same as a normal connection, but instead of storing coins, the charge display is increased by one unit, and charge registration is stopped when the subscriber or the other party ends the call. do.

The present invention is a device that eliminates the function of public charging control on the base station side and performs charging control only on the mobile station side in car public telephones, marine public telephones, etc., where charging control was conventionally performed on the base station side. It provides:

In other words, the present invention does not automatically detect the billing start time, but instead detects the billing start time based on the operator of the public telephone monitoring the incoming call signal and monitoring the connection status of the caller's response. It is characterized by:

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 shows an embodiment of the present invention, and shows the configuration of a car public phone that displays call charges. The car public telephone is comprised of a mobile main body 1 for wireless communication, a charge display adapter 2, a car phone 3, an antenna 4, and a power line 5. If the charge display adapter 2 is omitted, it functions as a general car phone terminal.

The part surrounded by the broken line in FIG. 2 shows the internal structure of the charge display adapter 2, and the operation display section is composed of a charge display 11, a display clear switch 12, a charging start switch 13, and a monitor speaker 14. The circuits that operate the operation display section are the charging timer 20 and the timer upper 1] control circuit 2.
1, connection destination regulation control circuit 22, connection destination memory 23. It is composed of a monitor switch circuit 24 and a monitor speaker amplifier 25. Between the charge display adapter 2 and the mobile device body l, there are a receive signal line 17, a transmit signal line 18,
There are interfaces including a hook signal line 26, a dial signal line 27, a squelch signal line 28, and a strong signal line 29.

There is still a hook signal line 1 between the car phone 3 and the car phone 3.
5. There are interfaces for the dial signal line 16, the receive signal line 17, and the transmit signal line 18, which are electrically connected to the hook switch 31, the dial switch 32, the receiver 33, and the transmitter 34.

Next, the operation will be explained.

When the hook switch 31 of the car telephone 3 is turned off in order to make a call, a dial tone is sent through the receiving signal line 17 and the receiver 33 rings. When the dial number of the other party is dialed from the dial switch 32, the connection destination regulation circuit 22 uses the first four digits of the dial signal from the dial signal line 16 (corresponding to the long-distance telephone office number) and presets in the connection destination memory 23. Verify the contents with the specific number listed. Judgment 1-1: Only the long-distance telephone office number set in the connection destination memory 23 is considered as a valid connection destination. If a 1-1 verification is achieved, the dial signal is relayed to the mobile device body 1.

When the dial signal reaches the mobile device body 1, the dial tone stops. If the first four digits of the dial signal do not match the settings in the destination memory 23, the dial signal is not relayed. At the same time as the dial signal is relayed, the speaker switch 24 is connected according to a command from the timer control circuit 21. In this state, the operator of the public telephone monitors the received voice signal using the monitor speaker 14.

Eventually, the line is connected and a ringback tone sounds.1. When the other party's response is monitored, the operator of the car public phone, such as a taxi driver, confirms this on the monitor and then presses the charge start switch 13 to issue a charge registration start command. Then, the charge display unit 11 displays the charge per call (100 yen if the call is 100 yen per call). At this time, the speaker switch 24 is turned off. The user then uses the handset 34, 33 instead of the operator to communicate with the called party. Simultaneously with the start of the communication, the billing timer 20 starts 1 o'clock, and every time the billing timer 20 measures a unit time, the call charge is registered in the charge display 11.

During a call, if the receiving electric field level of the mobile device main body 1 falls below the squelch level (Tataeva, ]OdBμ■) due to movement of a car, etc., both the receiving and transmitting communication channels are opened, and the squelch signal line from the mobile device main body 1 is opened. A strong squelch cut signal is sent through 28, and under the control of the timer control circuit 21, the operation of the charging timer 20 is stopped and charging registration is stopped.

When the mobile device main body 1 receives a disconnection signal during a call (due to the end of the call on the other party, a faulty uplink electric field, etc.), the communication path is opened, and a forced disconnection signal is sent from the mobile device main body 1 through the strong disconnection signal line 29. The timer control circuit 21 controls the charging timer 20 to stop operating the charging timer 20 and cancel charging registration.

When the user ends the call and turns on the hook switch 31, the operation of the charging timer 20 is stopped under the control of the timer control circuit 21, and charging registration is stopped.

When the user finishes the call, the operator charges the user the call fee shown on the fee display 11. Then, in preparation for the next use, press the display clear switch 12 to clear the display.

As explained above, the present invention is provided with a switch that issues a command to start registering call charges, and a handler monitors the receiving signal and determines that the other party has answered, and registers charges using the switch. By doing so, there is an effect that charge registration can be easily realized only on the mobile unit side without installing a special mechanism for charge registration on the base station side.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a toll display type car public telephone set showing an embodiment of the present invention, and Fig. 2 is a block diagram of the toll display adapter part and the car telephone set shown in Fig. 1. FIG. 11... Price display, 12... Display clear switch,
13...Billing start switch, 14...Monitor speaker patent applicant NEC Corporation

Claims (1)

[Claims] (1) A mobile station installed on a mobile body and a base station are connected by radio waves for communication, and a display device configuration that displays charges according to the amount of calls or a coin storage mechanism that stores coins inserted. The mobile radio public telephone device is characterized in that the mobile station is equipped with a monitor mechanism that monitors and determines the line connection status by monitoring received signals, and a switch that issues a command to start registering call charges. Simple mobile radio public telephone equipment.