How to Enable Text option on Trixbox ( asterisk )

Enable Text support in Asterisk ( TrixBox )

Need to Change on sip_general_custom.conf

Edit the following file path /etc/asterisk/sip_general_custom.conf and

add the following lines

textsupport=yes
allow=t140
allow=red

AST-COMM-02*CLI> reload

Then restart asterisk so that it reloads the config files