JP2936541B2 - 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. By the way, it is known that an ordinary non-cordless telephone device is provided with a display for display on the telephone device and can display a call charge. This call charge display is performed as follows. That is, the telephone device is provided with a charging rate map (for example, ROM) for storing charging rates (seconds in units of 10 yen) set 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 by 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 display the above-mentioned call charges, a ROM as a charging rate map and a means for measuring the call time may be provided on the handset side. 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 cordless telephone device in which two or more handsets are connected to one base unit, RO 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 charge rate map is provided in the ROM base unit, the charge 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 charging update data transmitted at regular intervals is mixed into the call voice to generate noise. is there. In order to prevent noise from being mixed into the call voice, a method of multiplexing the call voice and data, for example, by frequency multiplexing, and separating the data and the call voice on the receiving side (handset) is 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]

In the cordless telephone device according to the present invention, after the call is finished, the call charge data is transmitted from the telephone main unit to the telephone handset provided with the display, and the call charge is displayed on the display of the telephone handset after the call is completed. To

[Function] During a call, the billing update data is not transmitted. Therefore, noise due to the billing update data does not mix into the call voice. Then, after the end of the call, 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
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 circuit 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
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. The DC voltage superimposed on the 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 rotation. 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 display data has been received from main device 10 (step 102). When the display data is received, it is determined whether or not the display data is the call charge data (step 103). If the display data is the call charge data, the data is written into the work area RAM of the CPU (step 104), and the process proceeds to step 105. . If it is determined in step 102 that no display data has been received, or if it is determined in step 103 that the display data is not call charge data, the process jumps to step 105 immediately. Here, the call charge data is display data created by the main device 10, and is updated at predetermined time intervals according to a charging rate. This call charge data is provided with a marker for distinguishing it from other display data.
In step 3, discrimination is performed based on this marker. However,
Other methods can be used as a method for distinguishing from other display data. For example, if call charge data is always sent after a fixed time from the beginning of the display data, this time can be managed to extract the call charge data. Next, in step 105, it is determined whether or not the wireless channel is being used. If not, the process returns to step 102. If it is in use, the process proceeds to step 106, where it is determined whether or not a line telephone call is in progress. If not, the process returns to step 102.
If it is during the office line call, the process proceeds to step 107, where it is determined whether or not the office line has ended. If not, the process returns to step 102. If the local line call has ended, the process proceeds to step 108, where it is determined whether or not the call charge data is stored in the work area RAM of the CPU 23. If the call charge data is not stored (there is no call charge display when receiving a call)
Proceed to 109 to create only call termination information, while if call rate data is stored, proceed to step 110 to convert the call rate data to a data format for wireless transmission and create call termination information, Then, step 111
To transmit the data to the handset 30. Then, in step 112, a data reception response from the handset 30 is waited.
Proceed to 113 to clear the call rate data in the work area RAN. Then, after performing a line termination process and a process of disconnecting the wireless channel with the handset 30 in step 114, the process returns to step 102 and the above 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. Next, in step 202, it is determined whether or not the wireless channel is being used, and if not, this step 202 is continued,
If it is being used, the process proceeds to step 203, where it is determined whether or not a line communication is being performed. If it is not in the office line communication, the process returns to step 202, and if it is in the office line communication, the process proceeds to step 204 to determine whether or not data has been received. If no data has been received, the process returns to step 202. When the data is received, the process proceeds to step 205, and it is determined whether or not the end information is included.If there is no end information, the process proceeds to step 206, and the data reception response is transmitted to the connection device 20a. Return. If the call termination information is determined in step 205, step 2
Proceeding to 07, it is determined whether or not there is call charge data in the data. When it is determined that there is call charge data, the process proceeds to step 208, where the call charge is displayed in the charge display area of the display of the display circuit 39, and a display time timer is set. This is for displaying the call charge for a certain period of time after the end of the call. Thereafter, the process proceeds to step 209 to transmit a data reception response to the connection device 20a, and then proceeds to step 210 to perform processing for terminating the office line and cutting off the wireless channel. If it is determined in step 207 that there is no call charge data, the process jumps to step 209 and does not display a charge. After step 210, the process returns to step 202, and the above processing is repeated. In this way, on the display of the handset 30, the call fee for the call time is displayed for a fixed time after the end of the office line call. After the end of the call, a display erasing switch may be provided so that the desired time can be displayed instead of displaying for a fixed time. Further, in the above example, the call charge is calculated by the main device 10, but by transmitting the charging rate from the main device to the connection device 20a prior to the start of the call, the call charge is calculated by the connection device 20a. Calculation and creation of call charge data can also be performed. Although the above example is an example in which the present invention is applied to a special key telephone apparatus, it goes without saying that the present invention can be applied to an ordinary cordless telephone apparatus including a base unit and a handset.

【The invention's effect】

As described above, according to the present invention, the charge update data is not transmitted to the handset during the call, and the call charge data is transmitted after the call is completed. Therefore, data noise is not mixed into 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

Continued on the front page. (72) Inventor Masago Yabuta 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Inside Daiko Electric Co., Ltd. (72) Inventor Kozo Kobayashi 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone (72) Inventor Takeo Saito Nippon Telegraph and Telephone Corporation

Claims (1)

(57) [Claims] 1. A telephone main unit and one or more telephone subunits connected to the telephone main unit by radio, wherein the telephone main unit is used when a call is made by a call from the telephone subunit. Calculating means for calculating a call charge, and means for transmitting, to the telephone handset, call termination information including the call charge data calculated by the calculating means when the call by calling from the telephone handset ends. And a means for extracting the call charge data included in the call termination information sent from the telephone main unit, and a display for displaying a call charge based on the extracted call charge data. A cordless telephone device comprising: