ZyXEL Communications MSC1024G Series User Manual page 1002

Appendix A PSTN Parameters by Country
Ring parameters:
frequency: 50.0 Hz
amplitude: 53.0 Vrms
onTime1: 1.00 seconds
offTime1: 5.00 seconds
onTime2: 1.00 seconds
offTime2: 5.00 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
Caller ID parameters:
CID type: prior ring
payload type: ETSI-MDMF
first TAS type: DT-AS
second TAS type: NULL
first TAS interval: 300 ms
second TAS interval: 0 ms
start to ring: 400 ms (prior ring only)
Tones parameters:
dial tone: 420Hz -18.0dB continuous
ring back tone: 420Hz -18.0dB on 1.000s off 5.000s
busy tone: 420Hz -18.0dB on 0.400s off 0.400s
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MSC1000G/1024G/1224G Series User's Guide