PORTABLE ELECTRO-ACOUSTIC APPARATUS FOR TESTING TELEPHONE SETS Russian patent published in 2000 - IPC

FIELD: communication equipment, in particular, on-line monitoring of telephone sets. SUBSTANCE: device has test signal generator, test signal corrector, power amplifier, telephone board unit, which has artificial mouth, artificial ear, and members for mounting telephone handset, detector, measuring instrument, commutation unit. Goal of invention is achieved by introduced sound duct, which is inserted between artificial mouth and artificial ear and is designed as extended wall, which has solid walls and increased section size on both sides. Said sound duct is mounted for aligning its end that is covered by sound-absorbing material to artificial mouth frame through first flexible insertion. Another end of sound duct is connected to artificial ear through second flexible insertion by means of hinged cantilever, which is attached to sound duct and is connected to housing of telephone board. Also device has clamp for fixing said cantilever in this position. EFFECT: increased functional capabilities, increased reliability and fidelity of testing. 1 dwg