Appendix A Pstn Parameters By Country - ZyXEL Communications MSC1024G Series User Manual

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P P E N D I X
PSTN Parameters by Country
USA
Country Code: 0,usa
law: ulaw
impedance: 600ohm
loop current: 25 mA
tax type: metering
Ring parameters:
frequency: 20.0 Hz
amplitude: 53.0 Vrms
onTime1: 2.00 seconds
offTime1: 4.00 seconds
onTime2: 2.00 seconds
offTime2: 4.00 seconds
Pulse parameters:
flashMin: 90 ms
flashMax: 500 ms
breakMin: 47 ms
breakMax: 80 ms
makeMin: 30 ms
makeMax: 55 ms
interDigitMin: 250 ms
Meter parameters:
frequency: 12 kHz
onTime: 200 ms
offTime: 200 ms
MSC1000G/1024G/1224G Series User's Guide
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