<div dir="ltr"><div>Dear list:</div><div> </div><div>When I call an specific number on the PSTN, the provider who holds the destination number give back an specified sound just after admitting their incoming calls. Is there a way to allow Asterisk to compare sounds received to decide what is the Telco answering the call?</div>
<div> </div><div>I'm planning to do it to select the right provider to route further calls at least cost.</div><div> </div><div>In my country there are no public or accessible information on ported out numbers, so it is a way to discriminate what are the destination's Telco and build a database.</div>
<div> </div><div>Thanks in advance!</div><div> </div><div>Elder D. Arohuanca</div><div>Lima - Peru</div></div>