ZyXEL Communications IES-1248-51A - United Kingdom

Appendix B PSTN Parameters by Country
IES-1248-51V User’s Guide
625
confirmation tone: 600Hz -24.0dB on 0.125s off 0.125s
600Hz -24.0dB on 0.125s
United Kingdom
country code: 22,UK
law: alaw
impedance: 300ohm_1000ohm_220nf
loop current: 25 mA
tax type: metering
Ring parameters:
frequency: 25.0 Hz
amplitude: 53.0 Vrms
onTime1: 0.40 seconds
offTime1: 0.20 seconds
onTime2: 0.40 seconds
offTime2: 2.00 seconds
Pulse parameters:
flashMin: 90 ms
flashMax: 500 ms
breakMin: 47 ms
breakMax: 80 ms
makeMin: 30 ms
makeMax: 55 ms
interDigitMin: 250 ms