Asterisk to forward call to voip adaptor

Asterisk Asterisk General
1

When I call the number I get an error msg;

NOTICE[2886]: chan_sip.c:18523 handle_request_invite: Call from ‘4443xxxx’ to extension ‘1619768xxxx’ rejected because extension not found.

2

Because you don’t have 1619768xxxx set up in your dial plan. Are you using a GUI ?