Assistance for trunk

Hello,

My name is John Paul Kapepula I live in kinshasa congo rd. indeed,
I have an Asterisk server install on Ubuntu server and I count
create a sip trunk with my GSM gateway but Dinstar DWG200G
syntax seems difficult. why I made you this mail if you
could help me with the sip trunk of the syntax of the asterisk in
the console. Thank you