JP2660348B2 - Cordless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Industrial applications]

The present invention relates to a cordless telephone device, and more particularly to a display of a call charge.

[Prior art]

2. Description of the Related Art A cordless telephone device including a telephone main device (hereinafter referred to as a base unit) connected to a telephone line and a telephone handset (hereinafter referred to as a handset) wirelessly connected to the base unit is known. In this cordless telephone device, an up channel (a channel for transmitting information from the handset to the base unit) and a down channel (a channel for transmitting information from the base unit to the handset) having a frequency defined by the standard.
Thus, data transmission and call voice transmission are performed between the two. In general, non-cordless ordinary telephone devices are known which are provided with a display for display on the telephone device and can display a call charge. This aisle display is made as follows. That is, the telephone device is provided with a charging rate map (for example, ROM) for storing a charging rate (the number of seconds in units of 10 yen) determined according to the local area of the caller and the area of the other party. The billing rate is read from the other party's area code at the time of dialing when making a call. Then, every time the talk time elapses the number of seconds of the billing rate, billing update data for adding the call charge by 10 yen is output, whereby the telephone charge display on the display changes every moment according to the talk time.

[Problems to be solved by the invention]

Although it is conceivable that the cordless telephone device also displays a call charge, in this case, a display for displaying the call charge needs to be provided on the handset side. Therefore, in order to perform the above-described call charge display, a ROM, a call time measuring means, and the like may be provided on the handset as a charge rate map. However, in this way one handset at a time,
According to the method of providing the charging rate map ROM, in the case of a modeless telephone device in which two or more handsets are connected to one base unit, the number of ROs is equal to the number of handsets.
M is required, which increases the cost and is not practical. Therefore, a method is conceivable in which the charging rate map ROM is provided in the base unit, the charging update data is transmitted from the base unit to the handset side, and the call charge is displayed on a display provided in the handset. However, as described above, since the data transmission channel between the base unit and the handset is shared with the call voice channel, there is a drawback that the charge update data transmitted at regular intervals becomes mixed with the call voice and becomes noise. is there. In order to prevent noise from being mixed into the call voice, a method of multiplexing the passing voice and the data, for example, by frequency multiplexing, and separating the data and the call voice on the receiving side (handset) can be considered. However, this multiplexing method requires a pilot signal for separating data and speech voice, a subcarrier for multiplexing, and the like, and has a drawback that the circuit becomes complicated. It is an object of the present invention to provide a cordless telephone device capable of displaying a call charge on a handset without causing the above-mentioned disadvantages.

[Means for Solving the Problems]

A cordless telephone device according to the present invention comprises a telephone main device and one or more telephone subunits wirelessly connected to the telephone main unit, and the telephone main unit receives a call from the telephone subunit. Means for transmitting billing rate data to the telephone handset, wherein the telephone handset includes display means, means for calculating a call charge based on the received charge rate, and displaying the calculated call charge. Means for displaying on the means.

[Action]

If there is a call from the telephone handset, the charge rate data is transmitted from the telephone main unit to the telephone handset before the call starts.
Then, the calculation of the call charge during the call is performed in the telephone handset. Therefore, the charging update data is not transmitted during the call, so that noise due to the transmission of the charging update data is not mixed into the voice of the call. in this case,
The display means of the telephone handset can display a call charge that changes momentarily during a call, and after the call is finished, the call charge for the call time is displayed.

【Example】

FIG. 1 is a block diagram of an embodiment in which the present invention is applied to a special telephone device in which a cordless telephone handset can be used as one of the telephone handsets of a key telephone device. Reference numeral 10 denotes a key telephone main unit, which includes an office line circuit and an exchange unit 11,
A number of extension circuits 12a to 12n corresponding to the number of extensions, a data transmission / reception circuit 13, a control circuit 14 for controlling these, for example, a microcomputer (hereinafter referred to as a CPU), a DC power supply 15, a power separation filter 16 It consists of Reference numerals 1a to 1m denote one or a plurality of telephone lines, which are connected to the central office circuit and the switching unit 11. Reference numerals 2a to 2n denote a plurality of extension communication lines.
Extension circuit between each of 2n and the local line circuit and switching unit 11.
12a to 12n are connected. Reference numerals 3a to 3n denote extension data buses that are paired with the extension communication lines 2a to 2n, respectively. The extension data buses 3a to 3n are connected to the data transmission / reception circuit 13. In addition, a DC power supply is provided on this data bus to supply power to a connection device described later.
A voltage from 15 is supplied via a filter 16. The office line circuit and the switching unit 11, according to the control of the control circuit 14,
Connection between telephone line and extension line (external call) Connection between extension lines (extension call), etc. Each of the extension circuits 12a to 12n supplies a communication current under the control of the control circuit 14. For pairs of the same suffix of the extension communication lines 2a to 2n and the extension data buses 3a to 3n, the connection devices 20a to 2n
The one with the corresponding suffix of 0n is connected. A telephone cordless handset is connected to the connection devices 20a to 20n. In this example, the extension telephone line 2a and the extension data bus 3a are connected.
A cordless telephone handset (hereinafter referred to as a handset) 30 is wirelessly connected to the connection device 20a to which the pair is connected. Therefore, this connection device 20a is configured as a connection device for a cordless telephone handset. Other connecting devices have the same configuration as the connecting device 20a when the telephone handset is a wireless handset, but when not making a wireless connection with the handset, the configuration of a so-called key telephone equipped with function buttons and communication means Is fine. The connecting device 20a is composed of the hybrid circuit 21 and the wireless transmitting / receiving circuit 2.
2, a control circuit 23 including a CPU, and a data transmission / reception circuit 24
, A power separation filter 25, a constant voltage circuit 26, and a transmission / reception antenna 27. The extension communication line 2a is connected to a wireless transmission / reception circuit 22 via a hybrid circuit 21. The extension data bus 3a is connected to the data transmission / reception circuit 24. And this extension data bus 3a
Is supplied to the constant voltage circuit 26 via the power separation filter 25, and the power supply voltage Vcc of the connection device 20a is obtained from the constant voltage circuit 26. The control circuit 23 exchanges data with the data transmission / reception circuit 24 and exchanges data with the wireless transmission / reception circuit 22 to perform various controls. The handset 30 includes a transmitting / receiving antenna 31, a wireless transmitting / receiving circuit 32, a receiver 33, a transmitter 34, amplifiers 35 and 36.
, A control circuit 37 including a CPU, a function button switch 38 connected to the control circuit 37, and a display circuit 39 having a display for display. Reference numeral 40 denotes a rechargeable battery such as a nickel-cadmium battery. For example, when a call is made to an outside line using the function button switch 38, a call request is issued from the control circuit 37 to the connection device 20a via the wireless transmission / reception circuit 32. In response to this, the connection device 20a establishes a wireless communication channel with the handset 30, and transmits the transmission request data to the extension data bus.
It is sent to the main unit 10 via 30. Based on this, the control circuit 14 of the main device 10 controls the extension circuit 12a, the office line circuit and the switching unit 11 to connect the extension communication line 2a to the telephone line. Therefore, after that, a dial operation is performed on the handset 30, and if the other party responds, an outside line call becomes possible with the handset 30. In the case of an incoming call, on the contrary, incoming request data is sent from the main device 10 to the connection device 20a via the extension data bus 3a. Then, by establishing a wireless communication channel between the connection device 20a and the handset 30, an incoming call response by the handset 30 becomes possible. Similarly, for an extension call between the handset 30 and another telephone handset, a wireless channel is established between the connection device 20a and the handset 30, and the control circuit 14 in the local line circuit of the main device 10 and the switching unit 11 as well. The control is performed by connecting the extension communication line 2a to another extension communication line. Next, the operation at the time of displaying the call charge will be described in detail. This call charge display is made in the handset 30 at the end of the external call. FIG. 2 is a flowchart of a process performed by the CPU of the control circuit 23 of the connection device 20a when causing the handset 30 to display the call charge. FIG. 3 is a flowchart of a process performed by the CPU of the control circuit 37 of the handset 30 at that time. First, the processing operation by the control circuit 23 of the connection device 20a will be described with reference to FIG. First, initialization is performed (step 101). Next, it is determined whether or not data has been received from the handset 30 (step 102). When the data is received, it is determined whether or not the data is dial number data transmitted from an outside line (step 103). If it is dial number data for outgoing calls,
After completion of dial number input (step 104), the process proceeds to step 105. In this case, since the charging rate map ROM is provided in the telephone main unit 10, the charging rate data corresponding to the dialed number is read out from the ROM by the telephone main unit 10, and is transmitted from the main unit 10 to the connection device 20a. Transmitted.
In step 105, it is determined whether or not the charging rate data from the main device 10 has been received. In step 106, the charge rate data corresponding to the received dial number is provided with an identification marker for identifying other data, converted to a data format for wireless transmission of a cordless telephone, and transmitted to the handset 30. The connection device
A charging rate map ROM may be provided in 20a. After transmitting the billing rate data in this way, it waits for a response from the handset 30 indicating that the data has been received (step 107). When a response from the handset 30 arrives, it waits for a response from the other party (step 108). When a response from the other party arrives, it transmits charging start data to the handset 30 together with the other party response data (step 109). Then, it waits for the end of the call (step 110), and when the call is finished, transmits the line termination data to the handset 30 (step 111) and waits for a response from the handset 30 (step 1).
12) After performing the line termination process and the process of disconnecting the wireless channel with the handset 30 (step 113), the process returns to step 102. If it is determined in step 102 that data from the handset 30 has not been received, the process immediately returns to step 102. Then, the following operation is repeated. Next, the processing operation of the control circuit 37 of the handset 30 will be described with reference to FIG. First, in step 201, initialization is performed. Then, outside line dial data is transmitted (step 20).
2), since data is sent from the connection device 20a, it is determined whether or not the data includes billing rate data (step 203). When the accounting rate data is determined based on the identification data, a reception response of the accounting rate data is transmitted to the connection device 20a (step 204). Next, it is determined whether or not the destination response data has been received from the connection device 20a (step 205). At this time, after confirming the charging start data transmitted together with the destination response data, a reception response (step 206) is made, and then the charging timer is started (step 207). Then, the call charge is calculated to increase the charge by 10 yen every time the charging rate seconds elapse, and the call rate changes each time the charging rate seconds elapse. (Step 208). Next, it is determined whether or not the line termination data has been received from the connection device 20a (step 209). If the termination data has not been received, the process returns to step 208 to continue the calculation and display of the call charge. When the line termination data is received in step 209, a reception response is transmitted to the connection device 20a (step 210), and then the charging timer is stopped (step 211), and the charging calculation ends (step 212). Thereafter, a display timer is set (step 213), and after performing a line termination process and a process of disconnecting a wireless channel with a connected device (step 214),
Return to step 202. The display timer ends after a certain period of time. In other words, after the end of the call, the final call charge is displayed on the display of the display circuit 39 for a certain period of time. If it is determined in step 203 that the charging rate data has not been received, the terminal waits for reception of the line termination data (step 215), and after receiving the termination data, makes a reception response (step 216). Return. In the above example, the call charge is changed and displayed every moment. However, the calculated final call charge may be displayed on the display for a fixed time after the end of the line. In addition, the display of the handset 30 displays the call charge for the talk time for a fixed time after the end of the office line call, but instead of displaying the call charge for the fixed time, a display erase switch is provided to end the call. Thereafter, the desired time may be displayed. The above example is an example in which the present invention is applied to a special key telephone apparatus. However, it goes without saying that the present invention can be applied to a normal cordless telephone apparatus including a base unit and a handset.

【The invention's effect】

As described above, in the present invention, prior to a call, charging rate data is transmitted to the cordless telephone handset, and the calculation of the call charge is performed by the cordless telephone handset. Since there is no need to transmit the billing update data to the cordless telephone handset, no data noise is mixed in the call voice. Since the charging rate map ROM may be provided in the main apparatus, only one charging rate map ROM is required even when a plurality of handsets are connected to the main apparatus.

[Brief description of the drawings]

FIG. 1 is a block diagram of a cordless telephone device according to the present invention, and FIGS. 2 and 3 are flow charts for explaining a display of a call charge. 10; telephone main unit 20a to 20n; connecting device 30; cordless telephone handset 13,24; data transmission / reception circuit 14, 23, 37; control circuit 22, 31; wireless transmission / reception circuit 39; display circuit with display for display

Continuation of the front page (72) Inventor Kozo Kobayashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Takeo Saito 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Stock In-company (56) References JP-A-55-105470 (JP, A) JP-A-57-155846 (JP, A)

Claims (1)

(57) [Claims] A telephone main unit and one or more telephone slave units connected to the telephone main unit via a wireless channel having a control channel and a communication channel; Means for receiving, when receiving dialing information for calling from the slave through the control channel, charging rate data relating to a call with the call destination indicated by the dialing information to the telephone slave via the control channel; The telephone handset is provided with display means, means for calculating a call charge based on the received billing rate data, and means for displaying the calculated call charge on the display means. Cordless telephone device.