Call Progrees tones for india & other countries

Below is the configurtion used in the grandstream gateways to detect the busytone

# Dial Tone         :    ch1-8:f1=400@-10,f2=0@-10,c=0/0;

# Ringback Tone :   ch1-8:f1=400@-10,f2=0@-10,c=40/20-40/200;

# Busy Tone       :    ch1-8:f1=400@-10,f2=0@-10,c=75/75;

# Reorder Tone  :    ch1-8:f1=400@-10,f2=0@-10,c=25/25;

# Confirmation Tone :  ch1-8:f1=400@-10,f2=0@-10,c=100/400;

AC termination Impedence for india

 270 Ohm + (750 Ohm || 150 nF) -- Most of Europe

220 Ohm + (820 Ohm || 120 nF) – Australia, New Zealand

220 Ohm + (820 Ohm || 115 nF) – Austria, Bulgaria, Germany, Slovakia, South Africa

370 Ohm + (620 Ohm || 310 nF) – UK., India

for other coutries downloadlink

refer link: http://sites.google.com/a/3cx.com/3cx-wiki/documentation/gateways/how-do-i-configure-tonesets-for-my-country-on-a-grandstream-gxw-4108