Fluke Networks 19800003 TS19 Telephone Test Set with Banana Jacks to Alligator Clips Specifications: Loop Limit: 2.4 kOmaximum at 48 VDC (nominal 15 mA minimum loopcurrent) DC Resistance (Talk Mode): 150 Otypical at 80 mA current AC Impedance (Monitor Mode): Low impedance (Ring position) 600 Oat 1 KHz typical High impedance (HI Z position) 100 kOminimum at 1 KHz Rotary Dial Output: 10 pps .5 pps Pulsing Rate: 60 % ± 2 % Percent Break: 800 ms typical Interdigit Interval Leakage During Break: > 50 kO DTMF Output: ±1 % maximum Tone Frequency Error Level per Tone Pair: dBm maximum, - dBm minimum High versus Low Tone Difference: 4 dB maximum Temperature: Operating: -5 degree C to degree C Storage: -40 degree C to degree C Drop: 1 meter, 4 times Altitude: To 3,000 meters (10,000 feet) maximum Relative Humidity: 10 %to 80 % (non-condensing)