Zyxel IES-1000 EE [257/368] Ppendix

Zyxel IES-1000 EE [257/368] Ppendix
VOP1224-61 User’s Guide
257
APPENDIX A
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

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