[asterisk-users] Asterisk incoming call behaviour

[Vicky]

I am using asterisk to receive call from a DID provider . In configured
everything in freepbx properly and its working . I forwarded incoming calls
from did to a certain extension . Now  i tried calling from another sip
provider to this box , when i call from other provider to my DID number
 then call reaches asterisk and is sent to configured extension ..  however
if  the extension hangs up without picking then also i am being billed at
sip provider ( outgoing one ) . In simple words when people call me then
they ( other people ) are billed even if configured extension isnt picked up
and hangs the
phone. Normally when you call a person and they hang up then you arent
charged . Is this asterisk behaviour or is it freepbx dialplan the
culprit here ?
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