CN1048605C - Portable telephone circuit tester - Google Patents

Abstract

The present invention discloses a portable telephone for testing lines, which is composed of the following units: a switching device, a high voltage generating device, a dialing device and a call circuit device, wherein the switching device is used for operating tests with different types; the high voltage generating device is used for measuring the telephone capacitance and the insulation resistance; the dialing device is used for calling; the call circuit device is used for talking with a user or a callee, and therefore, a line operator can call and talk with the user and simultaneously, directly tests and examines the telephone capacitance, the grounding, the circuit break, the crossing of lines and the insulation resistance.

Description

Portable telephone circuit tester

The present invention relates to a kind of portable telephone circuit tester, belong to the communication line checkout gear.

The existing telephone circuit is gone through central office's switching system complex process, underground long distance communication tunnel and conduit and ground electric pole and to guide to the user indoor, in order to safeguard the best in quality of speech and data communications service, the lineman must often patrol and check telephone line and line fault is made quick action, in order to repair line fault, the lineman must transport and carry cumbersome apparatus and carry out field test or the request test cabinet personnel of central office test failure circuit, notify its line conditions and fault state to handle by test cabinet then and fix a breakdown, give and install, repair, maintenance brings inconvenience.

The present invention is directed to the problems referred to above, a kind of portable telephone circuit tester is provided, the lineman uses it can realize fast work direct calling and with user's communication and check the subscriber's line situation, as the phone condenser capacity, and insulation resistance, circuit intersects or opens circuit.

Task of the present invention is finished as follows: by keypad, redial push on switch, hook switch, dialing indicating device, hook, receiver, telephone transmitter, two lamps, lead-out wire, clip, battery cases constitute external structure, the telephone line that use is measured reception and transmitted by user or central office through the lead-out wire that is connected to TIP circuit and ring circuit comprises:

By the measuring switch that three contact-making switches are formed, this equipment is used for measurement insulation resistance and phone electric capacity, selectivity connect TIP line to three terminal+, A or B;

By the challenge switch that four contact-making switches are formed, this equipment is used for calling out also and user's communication, and selectivity connects a TIP circuit or ring circuit to four a terminal E, F, and G and H, attached to connect the ring circuit to measuring switch equipment;

By the pilot switch that four contact-making switches are formed, this equipment is used for amplifying desire by terminal C, and D is exported to be called out the speech on the IC and be used for operating a ceramic microphone;

A tone/pulse switch conversion equipment, its notice connects the terminal A by measuring switch equipment, and the connection state of the pulse of B voltage or tone terminal is by hook switch terminal HS tone/pulse dialing IC input;

Instrument 8 is used to refer to insulation resistance numerical value, direct voltage phone electric capacity, this direct voltage system is formed by the alternating voltage transformation, this alternating voltage stream is by a square wave generator and transformer, gives alternation and boosts by the power supply commutator-rectifier circuit of being made up of diode and capacitor.

The present invention adopts in the portable telephone circuit tester that above-mentioned various device formed, and the lineman calling party also handles direct test telephone electric capacity, ground connection, and line broken circuit intersects and insulation resistance; Adopt phone moulding load function circuit, make compact conformation, easy to carry, the operator must not carry big and heavy tester and wait for test result from central office's test cabinet, and the pilot switch through amplifying makes the operator can hear loud speech and do not operate and mobile phone must be placed in one's ear simultaneously.

Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:

Fig. 1 is a front view of the present invention

Fig. 2 is a rearview of the present invention

Fig. 3 is a conversion equipment circuit diagram of the present invention

Fig. 4 is dialing equipment of the present invention and call circuit circuitry figure

Fig. 5 produces the circuit diagram of high voltage installation for the present invention

With reference to accompanying drawing: Fig. 1 Fig. 2 shows external structure of the present invention, comprise and be arranged on keypad 1 on the upper back, telephone number 0 to 9 is arranged on it, through adhering on this pad one 2 the hook switch 3 of pushing on switch that redials, a dialing indicating device 4, hook 5 is fixed on the lower end, back, be arranged on the receiver 6 in front, the telephone transmitter 7 in following front, intermediate arrangement has instrument 8, Test Switchboard 9, tone/pulse switch 10, pilot switch 11, challenge switch 12, two lamps 13, the lower end is a lead-out wire 14, the lead-out wire terminal is connected with clip 15, battery case 16 is located at the telephone transmitter back, the dialing of dialing indicating device 4 sensing key pads 1, hook 5 is fixed to waistband or somewhere, 6 tins of audio frequency signals of receiver, the sound that telephone transmitter 7 sends on the line, the measured numerical value of instrument 8 indication insulation resistances and phone condenser capacity, measuring switch 9 is measured subscriber phone condenser capacity and insulation resistance, tone/pulse switch 10 is selected the switching mode of electronics or dynamo-electric exchange, pilot switch 11 selects to respond automatically the sound of service ARS or sense of hearing amplification, challenge switch 12 comes the calling party, two lamp 12 display switches 11 and 12 are to open or disconnect, and lead-out wire 14 connects each circuit and the clip 15 of uniting on the terminal that is arranged on lead-out wire is used for single-points or multiple spot.

Fig. 3 is a conversion equipment circuit diagram of the present invention, measuring switch 9 is made up of 3 contact-making switch 9-19-2 and 9-3, for measurement insulation resistance or phone condenser capacity, should open each switch 9-1,9-2 and 9-3 also are connected to contact point a, the contact point a that desires to apply the contact-making switch 9-I of battery power (B-) is connected to (+) terminal, the contact point b of contact-making switch 9-3 and the contact point b of the contact-making switch 9-2 through being connected to the TIP line separately are connected to terminal A and B, the contact point a that will belong to the contact-making switch 12-1 of the challenge switch through being connected to the ring circuit is connected to contact-making switch 12-2 and contact-making switch 9-2, when challenge switch 12 is when opening not the calling party, on the contact point a of the contact point switch 12-3 of challenge switch 12 that then will be and contact-making switch 9-3 that 12-4 is connected to measuring switch 9 and 9-2 through being connected to contact point a, the contact point a of contact-making switch 12-3 and contact point a and the contact point b of contact point b and contact-making switch 12-4 are connected to terminal E respectively, terminal G, terminal F and terminal H, when pilot switch 11 is when opening the sound of tin amplification, the contact-making switch 11-1 and the 11-2 that then will touch contact point a are connected to receiver 6, the contact point b of contact-making switch 11-1 is connected to terminal C also is connected to an operational amplifier 17 at the same time by a variable resistor VR just (+) input terminal, contact is opened the contact point a ground connection of 11-2 and contact point b is connected to terminal D, the outlet terminal of operational amplifier 17 that will be through being grounded to negative (-) input terminal is connected to the contact point a of contact-making switch 11-4, and contact point a and the contact point b of contact-making switch 11-4 is connected to terminal I and J separately.

Fig. 4 shows the composition of dialing equipment of the present invention and call circuit equipment, a bridge joint diode BD is passed through a surge viewer AR, inductor L1, L2 and a surge viewer TNR are connected on the terminal A and B of measuring switch 9, even TIP and ring circuit are exchanged via the clip 15 of lead-out wire 14, the supply normal voltage, to be applied to by the voltage of bridge joint diode BD on the base stage of electric crystal Q4, the signal of " low " is imported among the hook switch terminal H/S of tone/dial pulse dialer IC18, the electric power terminal VDD of tone/dial pulse dialer IC18 is by an electrostatic potential diode ZD and be connected to the pulse terminal of tone/pulse switch 10, and with the tone terminal ground connection of tone/pulse switch 10, when using the numeral 0 to 9 of keypad 1 to dial in a telephone number and use a hook switch 3 or redial, the operator pushes on switch 2 the time, the dial impulse terminal D P selectivity starting electric crystal Q2 of tone/dial pulse dialer IC18, and dialing indicating device 4 is operated, the noise elimination terminal MUTE of tone/pulse IC18 is connected on the base stage of power electric crystal Q3 of dialing indicating device 4 and is connected to the noise elimination terminal MUTE of call circuit IC19 simultaneously, on the transmission terminal TX of call circuit IC19 (it receives by the audio signal of tone/pulse dialing IC18 of dual tone multifrequency terminal DTMF and passes through tone terminal TONE), select frequency and via resistor R 10, R11, R12 and capacitor C4 are modulated, with resistor R 10, R11, R12 and capacitor C4 are connected to telephone transmitter 7, promptly-tool ceramic microphone CM, exported audio signal to terminal C and D by receiving terminal RX or receiver terminal RMT, select frequency and via the resistor R through being connected to the sidetone amplifier terminal STA 15, R16 and capacitor C6, C7 is modulated.

Fig. 5 shows the composition of high voltage generator of the present invention; the DC power supply is imported by just (+) terminal of the contact-making switch 9-1 of measuring switch 9; by resistor R 20; R21 also is transformed into AC power supplies via square wave generator 20; this AC power supplies is boosted by transformer TRS; and will pass through E through the AC power supplies of boosting; the F terminal is applied to challenge switch 12 and to diode D1; be transformed into the DC power supply in the way of the rectification circuit of D2 and capacitor C11 once again; will be via variable resistance VR1; the numerical value of this power supply that VR2 modulates is presented on the instrument 8 and is applied to challenge switch 12 by terminal G and H simultaneously; when the operator uses portable telephone circuit tester of the present invention to call out; then the clip 15 with lead-out wire 14 is connected on the subscribers feeder; then the TIP line is connected to contact point b and the terminal A of the contact-making switch 9-3 of measuring switch 9; the contact point a that ringing wire is connected to the contact-making switch 12-1 of challenge switch 12 goes up and terminal B; the supply voltage of the telephone wire that will be imported by terminal A and B is supplied to bridging diode BD by surge viewer AR; AR system protection telephone circuit is avoided lightning or thunder invasion and attack; therefore provide call circuit burning voltage no matter the polarity of TIP and RING circuit how; electronic pattern or dynamo-electric pattern system is selected to pulse terminal PULSE or tone terminal TONE via turn-out track tone/pulse switch 10; when the operator uses the keypad 1 of tone/pulse dialing IC18 to dial and turn-out track on pilot switch 11 and when connecting contact point a; can will amplify at amplifier 17 places by the audio signal that terminal C and D exported of calling out IC19; therefore; the operator can hear that the loud noise through amplification must not be placed on hand telephone set on the ear on receiver 6; in order to measure the insulation resistance of subscriber's line; the high voltage of necessary DC; when the operator connects TIP and ring terminal and the subscribers feeder of desiring the prediction amount and turn-out track in measuring switch 9; to be transformed into the rectangular-wave alternating-current power supply by square wave generator 20 by just (+) end 9 volt DC voltages of importing of measuring switch 9; electric crystal Q5 system is via being opened by the square wave AC power supplies of resistor R 22 and inducting high AC voltage on second limit of transformer TRS and export terminal E and F to; at the same time; this AC (interchange) voltage is passed through diode D1; the power rectifier circuit of D2 and capacitor C11 is transformed into direct voltage and its numerical value is referred on the scale of instrument 8; therefore; the telephone line situation can be according to being judged through the resistance value of indication on instrument 8; and the moving state of looking into the scale of examining instrument 8 can be measured the capacity of phone; promptly; the resistance value of telephone line has a predetermined numerical value and the indicating gage of instrument 8 is indicated once predetermined resistance value; yet; situation at call capacity; make charging of DC cut-off capacitance device and discharge; under charge condition, refer to meter finger nearly " 0 " and under discharged condition indicating gage become and slowly descend; note this kind situation; can check the existence of a tool telephone set or do not exist; when opening challenge switch 12; the state-transition of measurement insulation resistance is become the state of customer call; when the operator connects measuring switch 9 in company with the connecting subscribers participating calling; voltage induced that will be by (+) terminal just is to second limit of transformer TRS; this voltage is by the terminal E of challenge switch 12; F and measuring switch 9 be TIP circuit and ring circuit then; therefore; common call state and the talk state (tying up under the situation that is not connected to from the power supply of central office) of changing; therefore; the operator can be directly and the callee talk; when the operator connects the pulse terminal PULSE of tone/pulse switch 10 and input digit on keypad 1 time; then produce and be equivalent to " low " pulse of the numeral on the numerical key on the noise elimination terminal MUTE of tone/dial pulse dialer IC18; therefore; according to Enter Number, the dialing indicating device 4 just glittering.

Claims (1)

1, a kind of portable telephone circuit tester, it by keypad 1, redial push on switch 2, hook switch 3, dialing indicating device 4, hook 5, receiver 6, telephone transmitter 7, two lamps 13, lead-out wire 14, clip 15, battery cases 16 constitute external structure, the telephone line that use is measured reception and transmitted by user or central office through the lead-out wire that is connected to TIP circuit and ring circuit, it is characterized in that: circuit part comprises:

By the measuring switch 9 that three contact-making switches are formed, this equipment is used for measurement insulation resistance and phone electric capacity, selectivity connect TIP line to three terminal+, A or B;

By the challenge switch 12 that four contact-making switches are formed, this equipment is used for calling out also and user's communication, and selectivity connects a TIP circuit or ring circuit to four a terminal E, F, and G and H, attached to connect the ring circuit to measuring switch equipment;

By the pilot switch 11 that four contact-making switches are formed, this equipment is used for amplifying desire by terminal C, and D is exported to be called out the speech on the IC and be used for operating a ceramic microphone;

Tone/pulse switch 10 conversion equipments, its notice connects the terminal A by measuring switch equipment, and the connection state of the pulse of B voltage or tone terminal is by hook switch terminal HS tone/pulse dialing IC input; Dialing indicating device 4 is connected to tone/pulse dialing IC;

Instrument 8 is used to refer to insulation resistance numerical value, direct voltage phone electric capacity, this direct voltage system is formed by the alternating voltage transformation, this alternating voltage stream is by a square wave generator and transformer, gives alternation and boosts by the power supply commutator-rectifier circuit of being made up of diode and capacitor.

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