Thanks for the wishes and sorry it didn't help, though you can also try:
input gain 6
output attenuation 2
timeouts call-disconnect 2
timeouts wait-release 3
supervisory disconnect dualtone mid-call
supervisory answer dualtone sensitivity high
supervisory custom-cptone IR
ring number 0
or you can mesure your tones, record it with voice recorder from a phone set and a microohen, then take the numbers by opening the voice files with COOL Edit program.
Regarding the dial number to be with or without 00 you can define the outgoing voip peers twice once with 00 and once without!