| 摘要 |
Tester system for testing telephone sets, characterised in that the artificial voice generator (1) equipped with a calibration resistor (R2) connected with a graphic equalizer (2), which is connected through a sender sound switch (P1) with an artificial mouth amplifier provided with an artificial mouth (11), at which a microphone (M) of the telephone set (13) is placed, one of the line-wires of the set being connected with a direct current amplifier (6), and the other line-wire being connected with the power bridge (14) attached to a power unit (7), while at the same time the power bridge (14) is attached to wattless contacts of the sound switch (P2), while the receiver (S) of the telephone set (13) is placed at an artificial ear (12), which is connected with the input of the artificial ear amplifier (4), and the output of the artificial ear amplifier (4) is attached to the receiver circuit switch (P3), whose one contact is connected with the receiver operating contact (O) of the sound switch (P2), and the other contact is connected with the sender operating contact (N) of the sound switch (P2), and at the same time the receiver circuit switch (P3) is connected with the input of the AC/DC converter (5), whose output is at the same time connected with the calibration break switch (KAL) of the test switch (P4), with the receiver operating contact (O) of the test switch (P4) and the receiver operating contact (O) of the test switch (P4) and the sender operating contact (N) of the test switch (P4), the wattless contacts of the test switch (P4) being connected...<IMAGE>
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