[Asterisk-Users] answer supervision for POTS FXO interfaces

[Gilad Ben-Yossef]

Samudra E. Haque wrote:
> hello, using Asterisk, is there any clever way to provide answer 
> supervision based upon the received audio only from the FXO interface 
> (from a public PSTN switch that does not have battery reversal, or CPC).
>  


In zapata.conf use either

busydetecgt=yes
busycount=6

(it will take about 10 seconds to indetify the hangup or busy)

If you're lucky, you can try the experimental

callprogress=yes

Cheers,
Gilad