Adding sip_custom config files

The _custom.conf files will override the regular conf files. For example, you need to add allow=g729 to the sip.conf file, and you need it to remain. It will only remain until the next FreePBX update. To avoid this, you need to add sip_general_custom.conf. How? Right here!

In root, do:
cd /etc/asterisk
> sip_general_custom.conf
> sip_custom.conf
> sip_nat.conf
chown asterisk.asterisk sip_general_custom.conf
chown asterisk.asterisk sip_custom.conf
chown asterisk.asterisk sip_nat.conf
chmod 664 sip_general_custom.conf
chmod 664 sip_custom.conf
chmod 664 sip_nat.conf