Free SIP Trunk with IP Comms and Asterisk

by Theodis Butler · Published December 26, 2013 · Updated June 8, 2015

First, install asterisk on your server

apt-get install asterisk

Edit sip.conf in /etc/asterisk directory to add a sip trunk.

Edit extensions.conf in /etc/asterisk directory to add a phone extension.

IP Comms Configuration

username= *Username*
secret= *secret*
type=friend
insecure=port,invite
host=2way.ipcomms.net
allow=ulaw
dtmfmode=rfc2833
directmedia=no
trustpid=yes

“What do I do if my asterisk server has a private IP Address in sip_nat.conf or Asterisk SIP Settings in freePBX”

externip=Your external IP
localnet = your local network/ subnet mask (Example: 192.168.1.0/255.255.255.0)
nat=yes