Internal numbers and Hylafax

​hi
i am install HylaFax in centos 7​.
and send fax to another number,
but i am not give any fax from another fax machine or software.
my server is local in my company, in the first step i will config my
hylafax for internal use, and next step config for send and receive fax
from out of company.
Do you this work?
Tnx