> sub receive { > my ($packet,$leg,$from_addr) = @_; > ... > my $resp = $request->create_response('200', 'OK'); > print "\nPacket OUT:\n"; > print $resp->as_string; > $disp->deliver($resp); > > Can't locate object method "uri" via package "Net::SIP::Response" at /usr/local/share/perl/5.10.0 +/Net/SIP/Dispatcher.pm line 498. It does not know where to deliver the packet, so it tries to look at a route header (non given) or at the URI. The latter fails, because it's a response object, not a request, and thus has no URI. Yes, it would be better to have a better error correction at this point :) Look at Net::SIP::Registrar where it solves the same problem. You have to give the leg and dst_addr to deliver, so that it knows where to deliver it: $disp->deliver($resp, leg => $leg, dst_addr => $from_addr ) > > By the way we can see as well that create_response doesn't switch the From / To of the received p +acked ;-) It should not switch them. See rfc3261, 8.2.6.2: The From field of the response MUST equal the From header field of the request..... If a request contained a To tag in the request, the To header field in the response MUST equal that of the request.