[Asterisk-Users] answer supervision for POTS FXO interfaces

[Eric Wieling]

Gilad Ben-Yossef wrote:
> 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

That is DISCONNECT supervision, not ANSWER supervision.  Asterisk has 
no support for answer supervision using only audio.  If you want that 
get a PRI.