Appendix A PSTN Parameters by Country
Caller ID parameters:
CID type: during ring
payload type: MDMF
first TAS type: NULL
second TAS type: NULL
first TAS interval: 0 ms
second TAS interval: 0 ms
start to ring: 500 ms (prior ring only)
Tones parameters:
dial tone: 350+440Hz -18.0dB continuous
ring back tone: 440+480Hz -18.0dB on 2.000s off 4.000s
busy tone: 480+620Hz -18.0dB on 0.500s off 0.500s
congestion tone: 480+620Hz -18.0dB on 0.300s off 0.200s
call waiting tone #1: 2x(440Hz -18.0dB on 0.300s off 10.000s)
call waiting tone #2: 2x(440Hz -18.0dB on 0.300s off 10.000s)
special dial tone: 350+440Hz -18.0dB on 0.100s off 0.100s
howler tone: 1400+2060+2450+2600Hz -3.0dB on 0.100s off 0.100s
warning tone: 1400Hz -18.0dB on 0.500s off continuous
confirmation tone: 3x(350+440Hz -18.0dB on 0.100s off 0.100s)
holding tone: 440+480Hz -18.0dB on 0.500s off 0.500s; 350+440Hz -18.0dB on 0.500s off
2.500s
Japan
Country Code: 1,japan
law: ulaw
impedance: 600ohm_1000nf
loop current: 25 mA
tax type: metering
Ring parameters:
frequency: 20.0 Hz
amplitude: 53.0 Vrms
onTime1: 1.00 seconds
998
MSC1000G/1024G/1224G Series User's Guide