CN2270321Y - Portable line testing phone - Google Patents

Abstract

The utility model discloses a portable line testing phone. The utility model is composed of a conversion device which is used for operating tests of different types, a high voltage generating device which is used for measuring the phone capacitance and insulation resistance, a dialing device which is used for calling and a calling circuit device which is used for talking with a user or a callee. Therefore, a toll station telephonist can conduct calling, talk with the user, conduct direct testing and detect the telephone capacitance, earthing, circuit breaking, circuit crossing and insulation resistance.

Description

Portable telephone circuit tester

The utility model relates to a kind of portable telephone circuit tester, belongs 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 keep 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 malfunction to handle by test cabinet then and fix a breakdown, give and install, repair, maintenance brings inconvenience.

The utility model provides a kind of portable telephone circuit tester at the problems referred to above, and the lineman uses it can realize the direct calling of quick repair work 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 utility model realizes as follows: its external structure at first, comprise that being arranged on the upper back keypad has telephone number 0 to 9 on it, redial and push on switch and a hook switch through adhering on this pad one, a dialing indicating device, hook is fixed on the lower end, back, be arranged on the receiver in front, the telephone transmitter in following front, intermediate arrangement has instrument, Test Switchboard, tone/pulse switch, the listening key, challenge switch, two lamps, the lower end is a lead-out wire, the lead-out wire terminal is connected with clip, and battery case is located at the telephone transmitter back; This portable telephone circuit tester uses the telephone line of measuring reception and being transmitted by user or central office through the lead-out wire that is connected to TIP circuit and ring circuit, comprising:

A measuring switch 9 these equipment of being made up of three contact-making switches are used for measurement insulation resistance and phone electric capacity, selectivity connect TIP line to three terminal+, A or B;

A challenge switch 12 these equipment of being made up of four contact-making switches are 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 is attached to be connected the ring circuit to measuring switch equipment with H;

A listening key 11 these equipment of being made up of four contact-making switches are 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;

Its notice of tone/pulse switch 10 conversion equipments connects the terminal A that passes through 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.

The utility model 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 appearance load function circuit to 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 listening key 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 utility model is done and to be described in further detail:

Fig. 1 is the utility model front view

Fig. 2 is the utility model rearview

Fig. 3 is the utility model conversion equipment circuit diagram

Fig. 4 is the utility model dialing equipment and call circuit circuitry figure

Fig. 5 produces the circuit diagram of high voltage installation for the utility model

With reference to accompanying drawing: Fig. 1 Fig. 2 shows external structure of the present utility model, comprise that being arranged on the upper back keypad 1 has telephone number 0 to 9 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, the listening key 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 dial indicator 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, listening key 11 selects to respond automatically the sound of service ARS or sense of hearing amplification, challenge switch 12 comes the calling party, two lamp 13 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 utility model, and measuring switch 9 is that 9-2 and 9-3 form by 3 contact-making switch 9-1, 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, will desire to apply battery power (B ^-) the contact point a of contact-making switch 9-1 be 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 listening key 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, be connected to terminal D with the contact point a ground connection of contact-making switch 11-2 and with contact point b, 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 the utility model dialing equipment 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 on the base stage of electric crystal Q4 by the voltage of bridge joint diode B D, 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, an i.e. 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 the utility model high voltage generator; 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 be passed 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 utility model 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 avoid 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 listening key 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 seated in 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 indicated 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; indicating gage indication approaching " 0 " under charge condition 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 is by keypad 1, redial and push on switch 2, hook switch 3, dialing indicating device 4, hook 5, receiver 6, telephone transmitter 7, battery case 16 constitutes, 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: its external structure at first, comprise that being arranged on the upper back keypad 1 has telephone number 0 to 9 on it, through adhering to the 2 and hook switches 3 that push on switch that redial on this pad, 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, the listening key 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, and circuit part comprises:

A measuring switch 9 these equipment of being made up of three contact-making switches are used for measurement insulation resistance and phone electric capacity, selectivity connect TIP line to three terminal+, A or B;

A challenge switch 12 these equipment of being made up of four contact-making switches are 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 is attached to be connected the ring circuit to measuring switch equipment with H;

A listening key 11 these equipment of being made up of four contact-making switches are 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;

Its notice of tone/pulse switch 10 conversion equipments connects the terminal A that passes through 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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