Appendix B PSTN Parameters by Country
IES-1248-51V User’s Guide
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Meter parameters:
frequency: 12 kHz
onTime: 200 ms
offTime: 200 ms
Caller ID parameters:
CID type: prior ring
payload type: UK
first TAS type: line reversal
second TAS type: DT-AS
first TAS interval: 300 ms
second TAS interval: 150 ms
start to ring: 400 ms (prior ring only)
Tones parameters:
dial tone: 350Hz -22.0dB + 440Hz -18.0dB continuous
ring back tone: 400+450Hz -18.0dB on 0.400s off 0.200s
busy tone: 400Hz -18.0dB on 0.375s off 0.375s
reorder tone: 480+620Hz -24.0dB on 0.250s off 0.250s
congestion tone: 400Hz -25.0dB on 0.400s off 0.350s
special dial tone: 350+440Hz -13.0dB continuous
call waiting tone #1: 400Hz -18.0dB on 0.100s off 3.000s
call waiting tone #2: 400Hz -18.0dB on 0.200s off 4.000s
MWI tone: 350+440Hz -13.0dB on 0.100s off 0.100s
ROH tone: 1400+2060+2450+2600Hz 3.0dB on 0.100s off 0.100s
warning tone: 480+620Hz -24.0dB on 0.250s off 0.250s
480+620Hz -24.0dB on 0.250s
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