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Full path A-A (Analog - Analog) test
· Test Port: Second line or forth line audio interface
· Second line port has feeding and loop circuit maintenance functions.
· Output, Input Resistance: 600Ω; Multiple resistances
· Test Items: Point power level, frequency characteristic, power level characteristic, idle noise, inter channel crosstalk, quantizing distortion
· Near-end loop test and elsewhere relative test can be done automatically and up to 1500 lines of test record can be stored automatically in computer, only 1 minute is needed to finish a line of speech channel test.
· Auto comparison with ITU-T suggested and analyzed result during test, real- time report when under guideline, marked identification on record and graphic model display of test result · Operation modes of manual test, monomial or multinomial auto test, auto tests of all items are provided
· Sending sinusoidal signal frequency range is 200～3600Hz, step length is 1Hz, frequency
inaccuracy is less than 0.2Hz, frequency characteristic inaccuracy is less than 0.1dB
· Signal Rated Output Range is -72.5～+11dBm, Operation Inaccuracy is less than 0.1dB

Semi-path A-D、D-A、D-D Test
· 2M digital output port can output codes of -59～+3dBm 200～3600Hz digital sinusoidal
sequence, speech channel Signaling ABCD code can be set randomly, Output CodePattern: Code HDB3,Output Resistance: 75Ω, unbalanced
· 2M digital input port can test A-D, D-A, D-D speech channel characteristics witherror less than 0.15dB. Input Code Pattern: Code HDB3, Input Resistance: high resistance（＞2KΩ）, unbalanced.
· Semi-path test has full functions of all access test except for the auto relative test
· Test can be implemented at any speech channel slot time with speech channel signaling ABCD code monitored in real time
· Sound and light alarm when no signal, AIS, frame de-sync，CRC4 de-sync occur.

Others
Provide G821 error code analysis.storage capacity of 240 record.
Provide standard parallel printer interface, RS-232 serial interface
Integrated rechargeable lithium battery, continuously works for 4 hours.
(L×W×H): 270×177×73(mm)3
Weight: 2.5Kg