JPS5966233A - Test circuit of car telephone set - Google Patents

Abstract

PURPOSE:To discriminate whether a mobile set or a telephone set is defective, by providing a display section processing an external signal and a car telephone set signal and displaying a processing signal. CONSTITUTION:The car telephone set 17 and the car telephone mobile device 18 are connected and a car telephone set test circuit 19 is inserted between them for attaining the car telephone monitor. When a signal to be monitored is inputted from a car telephone set input/output signal terminal 1 of the circuit 19, the signal is processed at a signal processing section 2 and the result is outputted to a display circuit 3 and an external signal input/output signal terminal 4 via an interface signal group 16. The circuit 19 monitors a telephone logical level signal 5 and a voice signal 8 transmitted and received between the telephone set 17 and the mobile device 18, processes 12 a hook signal 10, a dial signal 11, and a response holding switch signal 12 via an input/output switching circuit 7 to switch the signals between the telephone set and the mobile set. Further, a virtual telephone function outputting a telephone tone signal and the like to a mobile device total test device is attained by switching the signals at the circuit 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a test circuit for a mobile phone to a mobile phone in a car phone system.

Conventionally, in car telephone systems, testing of mobile telephones was carried out using a Dentate function tester, which served as a counter-testing machine to the telephone.
A test machine was not prepared in order to clarify the problems that occur during connection. . Therefore, there was a possibility of making a mistake in determining whether the telephone was defective, whether it was good, or whether the mobile device was defective. In addition, the circuit configuration in which the pseudo telephone function circuit is incorporated as the internal circuit of the mobile equipment comprehensive test parking machine is complex and closely related to the main mobile equipment comprehensive testing equipment, so this unit must be taken out for the purpose of testing. It was difficult to use it.

SUMMARY OF THE INVENTION An object of the present invention is to provide a car phone test circuit that has a monitoring function that can determine whether a mobile device or a telephone is defective and, depending on the purpose, also has a pseudo telephone function.

To achieve the above object, a car phone test circuit according to the present invention processes signals from an external signal input/output terminal, a car phone signal input/output terminal, the external No. 49 input/output terminal, and the car phone No. 46 input/output terminal. and a display section for displaying the input/output signals and the processed signals of the signal processing section, and the display section is connected between the car phone and the car phone mobile device, and is connected between the car phone and the car phone mobile device. A monitor that monitors the signals sent and received between the terminals and outputs the processing results of signals such as hook status, response hold status, dial signal, place I-1 signal, etc. to the external input/output terminal 1- and the display circuit at a logic level. Connect the car phone mobile device comprehensive testing machine to the car phone instead of the function and car phone,
Based on the commands from this car phone mobile unit general test equipment, a hook signal, answer hold switch signal, dial signal, power switch, etc. are sent to the car phone mobile unit, and a TEL)-on signal from the car phone mobile unit, It has either one of the pseudo telephone functions that monitors logic level signals and outputs these signals to the car phone/mobile equipment comprehensive testing equipment, or it has both functions and either function is selected by a switching circuit. It is configured so that it can be used.

According to the above configuration, the object of the present invention is completely achieved.

The present invention will be explained in more detail below with reference to the drawings and the like. FIG. 1 is a circuit block diagram showing an embodiment of a car phone test circuit according to the present invention. In the figure, 1 is a car phone input/output signal terminal, 2 is a signal processing section, 3 is a display circuit that outputs the processing result performed by the signal processing section 2, and 4 is an input/output interface for the signal processing section 2 with an external device. 5 is a set of logic level signals from the car phone input/output signal terminal 1, 6 is a waveform shaping circuit, 7 is an external signal input/output terminal for
1 is a signal input/output switching circuit, 8 is a voice signal input from the car telephone input/output signal terminal 1), 9 is a clock input, 1O is a hook signal, 11 is a dial signal, 1211
'j: Response hold switch signal, 13 is a power switch signal, 14 is a test mode switching request signal, 15 is a test mode switching request acceptance signal, 16c is for connecting the signal processing section 2 to the display circuit and the external signal input/output terminal 4. This is a group of interface signals. This embodiment has two functions: a signal monitoring function of a car telephone and a pseudo telephone function. This function is switched by the test mode switching request signal 14. When the signal processing section 2 accepts this, the test mode switching request acceptance signal 1
5 to the external signal input/output terminal 4. First, the signal motor function of the car phone will be explained. In this signal mode, a connection form as shown in FIG. 2 is adopted. In FIG. 2, 17 is a car phone, 18
c) A mobile phone for a car phone; 19 is a test circuit according to the present invention; 20 is a connection cable that connects the car phone 17, the mobile phone 18, and the test circuit 19;

As shown in FIG.
is what is monitored. When a signal to be monitored is input from the input/output signal terminal l of the automobile telephone, the signal processing unit 2
and the result is processed in the interface signal groove 1.
The signal is output to the display circuit 3 and the external signal input/output terminal 4 via the signal line 6. 5 is a +p BL received voice signal inputted from the car phone input/output signal terminal 1, converted to a logic level via a waveform shaping circuit, and inputted to the signal processing section 2, which outputs 1.-
used for receiving messages. 9 is the clock input and 4. It is used as a synchronization signal for receiving the dial signal 11 in the Y processing section 2. Hook signal 10, dial signal 1
1. Response hold switch No. 3 12 is input to the signal processing section 2 via the signal input/output switching circuit 7. The signal input/output switching circuit 7 is configured to switch the input to the output by the Ij mode switching request acceptance signal 15.

The signal processing section 2 inputs the various signals described above and outputs them to the interface signal group 16 as a processing result.
The figure shows details of the interface signal group 16.
It is made up of three signal lines. These are all logic level output signals. In FIG. 4, 16aU is a bi-one sound detection signal, 16b is a dial sound detection signal, 16e is a hanger sound detection signal, 16d is a hanger sound detection signal,
168 to 16d are tones output from the car telephone. 16e is out-of-service lamp signal, 16f is response hold lamp signal, 16gt; It response hold switch signal, 16h
It is a l-t hook signal. Reference numerals 161 to 167 code the dial signals from the car telephone received by the signal processing section 2 and output them, and these outputs are held unchanged until the next dial signal is received.

Next, when performing the pseudo telephone noodle machine □ function, I will explain how to make ``c6'mj''.The connection at this time is to connect to room 3'l!I.

In FIG. 3, a 19H mobile phone mobile device is connected to the mobile phone device by a connection cable 1g. Also, test circuit '20
is connected to the mobile equipment general test fa' 21 through the connection cable 22, and operates as a mobile phone in response to commands from the mobile equipment general tester 21, and receives telephone signals sent from the car phone machine. Output to comprehensive testing machine.

16・f is a response hold lamp signal, 16g is a response hold switch signal, 16h is a hook signal, 6b, x6t~161
The dial signal from the car phone received by the signal processing section of id2 is encoded and output, and this output is held unchanged until the next dial signal is received.

When performing pseudo telephone operation, the signal mode switching request signal 14 is sent from the external signal input/output terminal 4 to the signal processing unit 2.
This is done after waiting for the signal mode switching request acceptance signal 15 to be output.

When the signal mode switching request acceptance signal 15 is output, the signal input/output switching circuit 7 operates, and the signal input/output switching circuit 7 operates. The signal 10, the dial signal 11, and the response voice-holding switch signal 12 are processed by the signal processing section 2.
At the same time, the power switch signal 13 can also be output from the signal processing unit 2. Also, the output logic level signal group 5, the waveform shaping circuit 6, Th1l, and the received audio signal 8
- The clock input 9 operates in the same manner as in the car phone monitor function q), and the monitored output signal is the fourth one. □63〜
□6. The feature of the 6° pseudo telephone function is that the hook signal, response hold switch signal, dial signal, and power switch signal can be externally input via the external input terminal 4. Response hold switch signal 11
! 16g, the dial signal 161 to 1611 and the power switch signal are input to the signal processing section 2 of the first j through 16m.

The signal processing section 2 processes these signals and outputs them to the car phone signal input/output terminal 1. Signal processing: The processing section 2 is composed of a 1-chip microprocessor, and is capable of processing tone detection, dial reception, dial signal transmission of the pseudo telephone function, etc. of the car telephone using software, according to the present invention. The test circuit can be realized with extremely little hardware.

Introspection, yo □ yo, yo 51. □9 Not only can it be used as a car phone monitor by connecting it between a mobile phone and a car phone, but it can also realize a similar phone function with a smaller number of nodes, making it useful for device debugging and resolving problems caused by Puyiard. It brings about great effects. ′

[Brief explanation of the drawing]

Fig. 1 is a circuit block diagram showing an embodiment of the car phone test circuit according to the present invention, Fig. 2 is a system diagram when the car phone test circuit is used as a car phone monitor function, and Fig. 3 is a car phone test circuit. FIG. 4 is a system diagram when the circuit is used as a pseudo telephone function, and FIG. 4 is a detailed diagram of the interface signal group shown in FIG. 1. 1... Car phone input/output signal terminal 2... Signal processing section 3... Display section 4... External signal input/output terminal 5... Telephone logic level signal group 6... Waveform shaping circuit 7. ...Signal input/output switching circuit 8
...Place/receive voice signal 9...Clock input 10...
・Hook signal 11...Diamond) v (G No. 12...
- Response hold switch signal 13... Power switch signal 14... Test mode switching request signal 15... Test mode switching request acceptance signal 16... Interface signal 17... Car phone 18... Car phone movement Machine 19...Car phone test circuit 20, 22...Connection cable 21...Mobile phone comprehensive testing device Patent applicant Hisashi Inoro, agent for NEC Corporation Patent attorney

Claims (1)

[Claims] an external signal input/output terminal, a car telephone signal input/output terminal; and a display section for displaying a processed signal of the processing section, and is connected between the automobile telephone and the automobile mobile terminal, and transmits and receives signals between the automobile telephone and the automobile telephone mobile terminal. monitors the signal sent to the hook state, response hold state 1. Dial signal, position) -
A monitor function that outputs the processing results of signals such as external input/output terminals and display circuits at a logic level, and connects the car phone mobile unit comprehensive testing equipment instead of the car and telephone. According to the commands from the mobile telephone system 1, a hook signal, answer hold switch signal, dial signal, power switch, etc. are sent to the mobile phone mobile unit, and the set tone signal 1. It has either one of the pseudo telephone functions that monitors logic level signals and outputs these signals to the car phone/mobile equipment comprehensive testing equipment, or it has both functions and either function is selected by a switching circuit. A car phone test circuit characterized by horizontal stripes.