CN2161027Y - Multipurpose telephone tester - Google Patents

Abstract

The utility model regards ordinary communication electricians as applied objects, has the same application mode as an ordinary central exchange, conforms to general communication working habits, and is used for telephone maintenance and test, temporary communication, number checking of electrical cables and line fault finding. In the utility model, circuits are simple, and a control circuit can realize all functions such as ringing output, ring trip, ringing input, conversation, etc. by using a lifting key and a relay. The utility model can provide necessary main conditions such as ring sources of the ringing output, DC voltage, audio test signals, etc. to telephone maintenance, and can test the call electrical level and the work state of the telephone.

Description

Multipurpose telephone tester

The utility model relates to a kind ofly can overhaul the multipurpose instrument of test to telephone set and communication line.

Along with the development of communication career, communication line is more and more, and the circuit of telephone set also becomes increasingly complex, if the maintenance of telephone set and communication line continues to test with the same telephone exchange or the switch of utilizing now.The inconvenience of not only working, and need operator and other telephone subscribers to cooperate, can produce serious influence to communication work.If therefore do not have a kind of convenient and practical detecting instrument, the communication maintenance work is with more and more difficult.

The purpose of this utility model overcomes the above problems exactly, provide a kind of and can carry necessary direct voltage, exchange ringing-current and test audio signal for the telephone set operate as normal, can test every function of telephone set, a kind of multipurpose maintenance tester of method of testing and tracing signal can also be provided for the maintenance communication fault.

Realize above purpose easily in order to use, and consider general communication worker's work habit, general technical of the present utility model design is: make it to become one and can send the audio frequency test signal that tracks, the intensity of indication accepted call signal and the size of outer line current, and comprehensive tester with telephone exchange all functions.

Below in conjunction with description of drawings concrete technical scheme of the present utility model, for convenience, represent to remove the contact of key and relay in the following description with two digits, the first bit digital representative group number wherein, second-order digit 1 is represented fixed contact, the moving plate of key or armature of relay control is removed in 2 representatives, and 3 represent moving contact, and save contact two words.Remove key 41 as the fixed contact of removing key the 4th winding point is abbreviated as, relay is also identical.

Control circuit.Control circuit simply is an important feature of the present utility model, and its controlled function is to realize by an interaction of removing between key and the relay.Concrete formation is, the 24V positive source connects removes key 12 and 51, remove key 11 and connect 22, remove key 13 and 23 and succeed electrical equipment 12, relay 11 and 33 connects ringing-current winding 2 ends, the other end 1 of ringing-current winding connects removes key 21 and relay 21, remove key 52 and connect 61, remove key 62 and succeed electrical equipment 23, remove the end that key 53 and 63 all is connected to supply transformer T1, relay 21 meets outside line binding post C, relay 13 connects C14, C15 and relay coil, the other end of C15 is succeeded electrical equipment 32 by electric bell DL, and relay coil and C14 also connect power cathode, have so just constituted control circuit.

Conversation and bridge-type anti-side-tone circuit are by triode BG, supply transformer T3, send words transformer T2, and receiver Sh, transmitter S and other related elements are formed, and with the effect of removing key control triode BG, triode BG send the words amplifier when removing key 32,33 connections, 42, the 43 RC phase shift positive feedback networkings of being made up of C6, C7, C8, R2, R3, R4 when connecting are connected and triode BG forms audio frequency and swings device, the audio signal that is produced be used for the test telephone machine talked about sensitivity and as cable check mark and the tracing signal of searching line fault.

LB1405 and its peripheral cell are formed level meter, are connected on the two ends of receiver, and what be used to refer to telephone set send the words level.

Rectifier type exchanges the size of current that miliammeter is used to refer to outside line, with the nature of trouble of definite telephone set and the loop resistance of outside line etc.

The course of work of its control circuit is as follows:

Automatic telephone or power supply phone are connected on c, f two ends, when the phone off-hook, by the 24v positive pole through remove key 12, remove key 21, relay 21, relay 22, binding post c, outside line, binding post f, ammeter, relay coil to power cathode form DC loop, the actuating of relay.At this moment reason remove key 12 to the path of binding post C by remove key 12 by remove key 51, remove key 62, relay 23, relay 22 to the circuit of binding post c replace, and makes relay be in attracting state always, relay just can discharge when having only the outside line DC channel to disconnect.After the actuating of relay, electric bell DL through relay 33, power transformer 2, power transformer 1, remove key 21, remove key 12, capacitor C 2, capacitor C 14, capacitor C 15 form ac circuit to electric bell DL, makes electric bell DL work, finishes the incoming call process.At this moment upwards remove removing key, remove keyed jointing point 11,12 and disconnect, cut off bell circuit, 11,13 connections make relay by removing keyed jointing point 13 and relay tip 12,13 self-insurances.Remove key simultaneously contact 62 is connected to 63, conversation and direct current tie line are connected, utilize this instrument and a power supply phone can form communication line.When being used for detecting telephone set, can be connected to c, e two ends so that loop resistance meets certain requirement.If remove downwards then connect the positive feedback network and can send for test or the audio signal used of fault tracing to telephone set removing key.

If magnetic telephone can be connected to d, e or d, f two ends, because partiting dc capacitor C16 is arranged, so relay can not move.The ringing-current that magnetic telephone is sent here can be by capacitor C 16, remove keyed jointing point 72,71,82,81, relay tip 31,32, electric bell DL, capacitor C 15, ammeter, binding post f, outside line, binding post d to C16 forms the loop, makes the electric bell sounding.At this moment move key and can send backward signalling, click button AN, relay passes through and aforementioned identical self-insurance process self-insurance, and talking path is connected.

Processes such as other process such as ring are breathed out, section bell and above process are basic identical.Only at this moment, exchanging ringing-current and direct voltage is that superposition is sent together, and its detailed process repeats no more.

In a word, can be connected on c, e two ends (power supply phone) to outside line when doing communication, or d, e two ends (magnetic telephone), its usage and common exchange are as broad as long.

When doing maintenance, can make this instrument send the necessary interchange ringing-current of phone function operate as normal, direct voltage, audio signal etc.The indication that adds ammeter can be determined nature of trouble (short circuit or open circuit), and place, place (signal section, conversation part or ring part), and the methods commonly used such as tracking measurement that are aided with signal voltage or direct voltage more just can be found out the fault point easily.

When do measuring, what the level meter of being made up of LB1405 can be indicated phone send words level, the intensity of pulse amplitude and double-audio signal.The audio signal of this instrument being sent with telephone set listen to the sensitivity of being talked about that can judge telephone set.Can determine the internal resistance of telephone set with the indication of ammeter, and available current ground changes and judges impulse make ratio etc.Pulse number can be judged with the sense of hearing.The ability that this instrument does not have the form parameter of paired pulses itself to measure, because this measuring circuit complexity, cost height, unfavorable raising instrument cost performance, and rarely found with the fault of these relating to parameters, related element is also seldom not so difficultly determined consequent abort situation.

Measure when using because do maintenance, telephone set directly and this instrument join, so employing 24V voltage feed can satisfy the need of work of various telephone sets.

When searching line fault, defective pair is connected on c, f or two binding posts of c, e, will removes key and remove upward, click button, make this instrument send audio signal, can be on the line with headphone according to audio signal having or not or size is determined location of fault.In order to prevent to disturb other communication line work, the blocking capacitor of can on headphone, connecting, and think and this instrument when contact conversation, can remove blocking capacitor, at this moment ammeter has the electric current indication, can remove downwards and search personnel's contact removing key according to the indication of ammeter if this instrument has attending personnel, and can determine the size of outer line resistance by the size of electric current.

The parameter of some main elements: C1,330 μ f,, C2,100 μ f, C3,330 μ f, C4,100 μ f, C5,47 μ f, C6, C7, C8,0.047 μ f, C10,10 μ f, C11,47 μ f, C12,1 μ f, C13,1 μ f, C14,100 μ f, C15,1 μ f, C16,1 μ f, R1,200 Ω, R2, R3, R4,2.7K, R5,150K, R6,30K, R7,100 Ω, R8,510 Ω, R9,150 Ω.Receiver sh can become with the mobile phone that common power supply telephone set is used entirely with transmitter s, can when specially doing the phone detection.Ammeter can add bridge rectifier with the 50mA DC ammeter and form.Electric bell DL can with polarized bell or Electronic ring that ordinary telephone set is used.T1 is a power transformer, 7,8 liang of termination 220V AC power, 1, output 60V in 2 two ends exchanges ringing-current voltage, 3, the two 14 volts voltages of 4,5 three ends output are exported the 24V voltage of using for control circuit after rectifying and wave-filtering and three terminal regulator 7824,7812 voltage stabilizings, and the flat indicating circuit and send words 12V voltage that phone is used and the 3V voltage that supplies the local battery apparatus telecommunication circuit to use after R2 step-down C5 filtering of powering.The input transformer that transformer T2 can use with the general semiconductor broadcast receiver, T3 is because have bigger direct current by selecting for use bigger iron core by the 1:1 coiling.Relay can be selected 24 volts of high sensitivity types of 1250 Ω for use.The peripheral cell of LB1405 can be looked into relevant handbook.

The winding point of action when Fig. 2 represents that removing key upwards moves, 2 expressions are removed key and are removed the moving plate of control, and the fixed contact that key contact with 2 is removed in expression when neutral position, 3 moving contacts that contact with 2 after representing to move.

The winding point of action when Fig. 3 represents that removing key moves downwards, 1,2,3 meanings are identical with Fig. 2.

Fig. 4 represents the winding point of relay, 1 expression fixed contact, and 2 expressions are subjected to the moving plate of relay magnet control, 3 expression moving contacts.

Claims (1)

1. Remove the phone detecting instruments of using that the exchange function is arranged that key and relay are formed control circuit by one more, it is characterized in that the feed positive source connects the moving plate (12) of removing the key first winding point and the fixed contact (51) of the 5th winding point, the fixed contact (11) of removing the key first winding point connects the moving plate (22) of the second winding point, the moving contact of removing the key first winding point and the second winding point is all succeeded the moving plate (12) of the electrical equipment first winding point, the moving contact that the fixed contact (11) of the relay first winding point connects the 3rd winding point connects an end (2) of (33) and ringing-current output winding, the other end of ringing-current coil (1) connects the fixed contact (21) of removing the key second winding point and the fixed contact (21) of the relay second winding point, the moving plate (52) of removing key the 5th winding point connects the fixed contact (61) of removing key the 6th winding point, the moving plate (62) of removing key the 6th winding point is succeeded the moving contact (23) of the electrical equipment second winding point, remove the moving contact (53 of the 5th group on key and the 6th winding point, 63) all be connected to an end of supply transformer (T3), the moving plate (22) of the relay second winding point is connected to two moving contacts (73 removing the 7th group on key and the 8th winding point, 83) and on the binding post (C), be parallel with the relay coil one termination power negative pole of 100 μ f capacitors, the other end is connected together with the moving contact (13) of the relay first winding point and the blocking capacitor (C5) of ammeter and electric bell, another termination electric bell (DL) of electric bell block capacitor (C5), the moving plate (32) of another relay termination the 3rd winding point of electric bell (DL), the fixed contact (31) of relay the 3rd winding point connects the fixed contact (81) of removing key the 8th winding point, the moving plate (82) of removing key the 8th winding point connects the fixed contact (71) of removing key the 7th winding point, the moving plate (72) of removing key the 7th winding point connects binding post (d) and button (AN) through partiting dc capacitor (C16), another termination binding post (e) and the resistance (R9) of button (AN), another termination binding post (f) and ammeter of resistance (R9).

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