JPH02121534A - Automobile telephone system - Google Patents

Abstract

PURPOSE:To avoid such an inconvenient case where a talking state is mistakenly finished during another talking state by invalidating the talking state even with the operation of a talking end operation means which finishes the talking performed via a wrong handset in the case the talking is carried out via a hand-free handset or a cordless handset. CONSTITUTION:When a talking start key of a cordless handset 70 is turned on, a communication control part 35 identifies the talking of the handset 70 and sets a handset talking mode to inhibit the reception of a talking end signal via a talking end switch of a keyboard 13. When a talking start switch of the keyboard 13 is operated, a hand-free talking mode is set and at the same time the ring-off signal set by a talking end key of the handset 70.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a car telephone device that is mounted on a car and connected to a telephone switching network via a wireless line.

(Prior Art) This type of car telephone device, as shown in FIG. The wireless device 3 has a device 3 connected to a telephone control device 5 . The telephone toll i device 5 also includes a handset 7 that is a normal handset, a speaker 9 and a microphone 11 that constitute a hands-free handset, and a device for making hands-free calls and receiving incoming calls. A keyboard 13 to be used is connected.

The car phone device configured as described above allows you to make a hands-free call using the subica 9 and the microphone 11 without taking your hands off the steering wheel of the car, and also allows you to use the handset 7 using the handset 7. You can also make regular phone calls. keyboard 1
3. Multiple keys necessary for hands-free calling,
For example, it is provided with a call start key, a call end key, a dial key for calling a partner, a speed dial key, etc.

When making a hands-free call, first operate the call start key on the keyboard 13, then use the dial key for calling the other party to operate the other party's telephone number to call the other party, and after the other party answers, Speaker 9 and microphone 1
1 allows you to talk hands-free using
Also, if you receive a call from the other party, press keyboard 1.
By operating the call start key 3, you can talk to the other party hands-free. Further, when the call is to be ended, the call end key on the keyboard 13 is operated to end the call. The telephone control device 5 thus has the function of switching between a hands-free call using the speaker 9 and the microphone 11 and a normal call using the handset 7, but normally the call using the handset 7 is given priority and the speaker 9 and the microphone 11 are used for hands-free calls. If the handset 7 is removed from the cradle during a free call, the call will shift to the handset 7, and if the handset 7 is returned to the cradle, the call will return to hands-free.

Nowadays, cordless telephones have been widely used, and FIG. 7 is a diagram showing a simple configuration of such a cordless telephone. The cordless/sumi filling machine shown in the figure has a base unit 1 that is connected to a telephone line and equipped with a charging function, etc.
5, and a slave unit that is connected to the base unit 15 via a wireless line with relatively weak radio waves and has functions such as a transmitting/receiving function, a dialing function, and a function for generating call start and end control signals. It is composed of a handset 17.

The handset 17 of such a cordless telephone does not require a telephone line to be connected to the base unit 15, and has the advantage of being able to talk freely from a location away from the base unit 15.

(Problems to be Solved by the Invention) The above-mentioned conventional car phone device has two types of calls: a hands-free call consisting of a speaker 9!3 and a microphone 11, and a call using a handset 7. Hands-free calls are generally used by a car driver. Because it is conveniently installed near the driver's seat, people sitting in seats other than the driver's seat, such as the rear seats, must use handsets 1 to 7 to make calls. Since the cable is connected to the telephone control device 5 by wire, there is a problem in that the wire cord becomes a hindrance and may impede driving in some cases.

Therefore, it is desirable to make this handset 7 cordless, but if it is made cordless, the @
At least a call start key for making a call or answering an incoming call and a call end key for ending a call are required regardless of whether the handset is removed, and the handset is turned on/off using these keys. In some cases, the cordless handset is not in use even if it is removed from the cradle near the driver's seat of the car. Therefore, even if a person in the back seat is talking on a cordless handset, it is difficult for the driver to tell whether the cordless handset is in use or not. or, conversely, the driver may accidentally operate the call end key on the cordless handset in the rear seat while making a hands-free call. There is a problem in that the hands-free call by the driver is terminated.

The present invention has been made in view of the above, and an object of the present invention is to prevent a car phone from accidentally ending one call during a call when the other has both hands-free calling and cordless handset calling functions. The goal is to provide equipment.

Configuration of the Invention] (Means for Solving the Problems) In order to achieve the above object, the car telephone device of the present invention has the following features:
As shown in FIG. 1, there is a main control device 41 mounted on a vehicle and connected to a telephone exchange network via a wireless line, and a hands-free transmitter connected to the main control device for making hands-free calls. provided in the handset 42 and the main control device,
a first call termination operation means 43 that is operated to terminate a call using the hands-free handset; and an n1 control device 44 that is connected to the main control device via another wireless line and has a cordless handset. and n] a second call termination operation means 45 provided in the control device and operated to terminate a telephone conversation using the cordless handset; a first prohibition means 46 that prohibits the hands-free handset from terminating a call even if a call end operation means is operated; The main feature of the present invention is to include a second prohibition means 47 that prohibits the cordless handset from terminating a call even if the operation means is operated.

(Function) The car telephone device of the present invention allows the hands-free handset to terminate the call even if the second call termination operation means for ending the call by the cordless handset is operated when the hands-free handset is in use. Even if you operate the first call termination operation means that terminates a call using the handsfree handset when a call is in progress with the cordless handset 1, the cordless handset 1
It is prohibited to end a call by calling.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 2 is a block diagram showing the configuration of a car telephone device according to an embodiment of the present invention. The car telephone device shown in the figure has an antenna 1 and a radio device 3 that connect to the public switched telephone network via a wireless line and a wireless base station (not shown), and the radio device 3 controls the entire car phone device. It is connected to a telephone control device 50 that operates. The telephone control device 5
0 includes a speaker 9 and a microphone 11 constituting a hands-free handset, and various keys used for hands-free calls and for generating control signals such as a Daicel signal, a call start signal, and a call end signal. A keyboard 13 is directly connected thereto, and a cordless handset 70 is also connected via another wireless line. Telephone charges TL! The l device 50 is connected to a communication interface unit 51 connected to the wireless device 3 and a keyboard 13, and has input processing of control signals for hands-free calls, a function to switch between hands-free calls and handset calls, and a function to control busy tone during a call. A communication control unit 53 and a speaker 9, which have a function of detecting and returning the handset to an on-hook state during a call.
It also has a hands-free calling circuit 55 connected to the microphone 11, and a wireless section 57 corresponding to a base unit of the cordless handset 70 that transmits and receives control signals and audio signals to and from the cordless handset 70 by weak propagation.

FIG. 3 is a diagram showing the structure of the keyboard 13. The keyboard 13 shown in the figure includes a call start switch 21 used when starting a call, a call end switch 33 used when ending a call, and an abbreviation die to normal memory switch that stores an abbreviated phone number of the other party. 23 to 31, and this keyboard 13 is installed, for example, on a steering pad of an automobile.

FIG. 4 is a block diagram showing the configuration of the cordless handset apparatus. A cordless handset 70 shown in the figure has an antenna 71 and a radio section 73 that communicate with the radio section 57 of the telephone control device 50 via a radio line, and the radio section 73 performs key manual processing, dialed number display control, etc. , and is connected to a control section 75 that controls various operations such as call control. Furthermore, seven speakers and a microphone 81 constituting a handset are connected to the control unit 75 via a telephone communication circuit 77 . The call circuit 77 is a speaker 79
It also amplifies input and output audio to and from the microphone 81. The control unit 75 includes a keyboard 8 which is operated to input dial numbers and start and end calls.
3 and a display 85 made of, for example, an LCD that displays dial numbers and the like is connected. The keyboard 83 has dial keys consisting of 0 to 9, *, and #, a call start key 83a, and a call end key 83b.

Note that the communication control section 53 of the telephone control device 50 and the control section 75 of the cordless handset 70 are configured by a computer system using, for example, a microflosser, and control operations are mainly realized by software of the combicoater system. .

Next, the operation will be explained with reference to flowcharts 1 to 1 in FIG.

First, when the present car telephone device is activated, it is determined whether or not there is an incoming call to the present car telephone device via the wireless line from the public switched telephone network (step 110), and the call start switch 21 (ST SW) of the keyboard 13 is turned on. Step 120> or cordless handset 1~
70 is turned on (step 130), the system enters a standby state while checking sequentially.

Here, first, suppose that the call start key 83a of the cordless handset 70 is turned on (step 130).
), the control section 75 of the handsera 1 to 70 detects that the call start key 83a is turned on, modulates the on signal via the wireless section 73, and transmits it from the telephone controller 71 to the telephone control 7a device 50. Telephone control device 50 receives this signal via radio section 57, demodulates it, and supplies it to communication control section 53. As a result, the communication control unit 53 identifies the call from the handset 70, sets the handset call mode, and presses the keyboard 13 (K
A call end signal from the call end switch 33 (ENDSW) of B) is received (step 140).

When the call start key 83a is operated on the handset 70, a dial number is then input from the keyboard 83.
and is received as a radio signal by the radio section 57 of the telephone control device 50 via the antenna 71 and demodulated by the communication control section 5.
3 (step 150). The dial number supplied to the communication control unit 53 is sent to the antenna 1 as a wireless signal via the communication interface unit 51 and the wireless connection head 3.
The call is made by being received by the public switched telephone network via the mobile telephone radio base station, the connection is completed, and the radio device 3 is calling the other party's telephone via the cellular system's communication channel. Receive a tone. This ringback signal is transmitted from the wireless device 3 to the handset 70 via the communication interface section 51, communication control section 53, and radio section 57, and is heard from the speaker 79 of the handset 70. When the other party answers, the wireless circuit between the wireless base station of the cellular system and the wireless device 3 (for example, 800 to 900 MH2 band) and the wireless line between the wireless section 57 of the telephone control device 50 and the wireless section 73 of the handset 70 A call is initiated via handset 70 (eg, 40 MHz) (step 170).

While a call is being made using the handset 70,
Whether a busy tone has been transmitted (step 180)
), the call start switch 21 of the keyboard 13 is operated (
71) or the call end key 83b (END SW) of the handset 70 is pressed.
) is operated or not is checked in step 200). Busy tone is not detected and keyboard 13
0 The call start switch 21 was not operated and the handset 7
If the call termination key 83b of No. 0 is operated, it is determined that the call has ended, the line of the cellular system of the wireless device 3 is disconnected, and the call termination process is performed (steps 200 and 210), and steps 110, 120, and 130 are performed. The j+f state of the machine is before.

If a busy 1-tone is detected in step 180, it means that a busy tone, that is, a busy tone, has been sent from the telephone exchange network because the other party first hung up the call and ended the call. However, this busy tone is supplied to the communication control unit 53 via the antenna 1, the wireless device 3, and the communication interface unit 51, and is detected in the communication control unit 53 (step 180).The communication control unit 53 When a busy tone is detected, the line between the cordless handset 70 and the telephone i3D device 5o is disconnected, the call is terminated, an on-hook state is set, and the call is terminated (step 210).This leaves the busy tone as is. This prevents the howler sound from occurring due to the call, and immediately returns to the standby state for new calls.

In the standby state of steps 110, 120, and 130,
When the call start switch 21 of the keyboard 13 is operated (step 120), the ON signal from the call start switch 21 is supplied to the communication control unit 53, and the hands-free call mode is set and the cordless handset is activated. 70, call end key 83b (END S
W) is prohibited from issuing a call termination signal (step 220). Then, the dial/full number is entered from the keyboard 13 (step 230), and a call is made (step 240).
), the line is connected to the other party, and when the other party answers,
Speaker 9 and microphone 1 via communication circuit 55
1 starts a hands-free call (step 2
50).

During a hands-free call using the speaker and microphone 11, it is necessary to check whether a busy tone has been transmitted (step 260) and whether the call start key 83a of the handset 70 has been operated (turned on) (step 2).
70) or call end switch 33 on keyboard 13
Step 28 whether or not (END SW) is operated.
0) is checked. If a busy tone is not detected, the call start key 83a of the handset 70 is not operated, and the call end switch 33 of the keyboard 13 is operated, the call is determined to be over and the line of the cellular system of the wireless device 3 is disconnected. and performs call termination processing (step 280,
290>, the process returns to the standby state of steps 110, 120, and 130.

In step 260, if a busy tone is detected, this means that during a call, the other party first hung up the telephone and ended the call, and a busy & busy tone was sent from the telephone exchange network. When a busy tone is detected, the wireless line is disconnected, a call termination operation is performed, an on-hook state is set, and the call is terminated (step 290).

Also, in step 270, during a hands-free call Q
The operation of the call start key 83a of the handsets 1 to 70 is transmitted from the control unit 75 and the wireless unit 73 to the wireless unit 57, and when the communication control unit 53 detects that the call start key 83a of the handsets 1 to 70 has been operated, the call end switch 33 of the keyboard 13 is activated. The talk signal is inhibited, the call end key 83b of the handset 70 is enabled, and the call is switched to the handset 70 (step 300).
.

Further, in step 190, when the communication control unit 53 detects that the call start switch 21 of the keyboard 13 has been operated during a handset call, the handset 70
The call end signal from the call end key 831) is prohibited, the call end switch 33 of the keyboard 13 is enabled, and the call is switched to hands-free call using the speaker 9 and microphone 11 (step 310).

Furthermore, if there is an incoming call in the standby state of steps 110, 120, and 130, if the call start switch 21 of the keyboard 13 is operated, the call will be switched to hands-free. If the call start key 83a is operated, the call will proceed to handset call (steps 330, 30
0,170). Call end switch 33 on keyboard 13
Alternatively, if one of the call end keys 83b of the handsera 1-70 is pressed, the line is disconnected and the handset returns to the standby state (step 340).

[Advantageous Effects of the Invention 1] As explained above, according to the present invention, even if the second call termination operation means for terminating a call using the cordless handset is operated when a call is in progress using the handsfree handset, the handsfree call is terminated. Even if you operate the first call termination operation means that prohibits you from ending a call using the handset and terminates a call using the handsfree handset when you are talking with the cordless handset, the cordless handsets 1 to 1. If you have both a hands-free call and a cordless handset call function, even if you end one call during the other call, you will not be able to terminate one call. There is no need to accidentally terminate the program midway through. Furthermore, since it is possible to make calls using the cordless handset, the cord does not become an obstacle and interfere with driving. Furthermore,
When a busy tone is detected during a call, the handset is placed on-hook to end the call, eliminating the need for an on-hook operation on the vehicle side, improving operability.

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to claims of the present invention, FIG. 2 is a block diagram showing the configuration of a car telephone device according to an embodiment of the present invention, and FIG. 3 is a keyboard used in the car phone device of FIG. 2. 13 is a block diagram showing the configuration of the cordless handset used in the car telephone device shown in FIG. 2, and FIG. FIG. 6 is a block diagram of a conventional car telephone device, and FIG. 7 is a block diagram of a cordless telephone device. 1... Antenna 3... Wireless device 9... Speaker 11... Microphone 13... Keyboard 21... Call start switch 33... Call end switch 50... Telephone charge ill device 70. ... To cordless handset 1 75 ... 7 control parts ... Speaker 81 ... Microphone 83a ... Call start key 83b ... Call end key Agent Patent attorney Yasu Miyoshi Telephone exchange network No. 2 Figure 3 Figure 31 Figure 4

Claims (1)

[Claims] (1) A main control device mounted on a vehicle and connected to a telephone switching network via a wireless line; a hands-free handset connected to the main control device for making hands-free calls; a first call termination operating means provided in the control device and operated to terminate a call using the hands-free handset; a second call termination operation means provided in the subcontrol device and operated to terminate a call by the cordless handset; a first prohibition means for prohibiting the hands-free handset from terminating a call even if a second call termination operation means is operated; 1. A car telephone device comprising: second prohibition means for prohibiting the cordless handset from terminating a call even if the termination operation means is operated.