intro

Installing Asterisk:

sudo apt update

sudo apt install asterisk asterisk-dahdi

sudo systemctl status asterisk

If in any case, the asterisk service is not running, you can start the asterisk service with the following command:

$ sudo systemctl start asterisk

If you want to stop the asterisk service for some reason, then run the following command:

$ sudo systemctl stop asterisk

If you have changed the asterisk configuration files, then you can restart asterisk for the changes to take effect with the following command

sudo systemctl restart asterisk

ls /etc/asterisk

cd /etc/asterisk

sudo cp extensions.conf extensions.conf.backup

echo | sudo tee sip.conf

Now run the following command to open sip.conf file with nano text editor:

sudo nano sip.conf

paste

[general]
context=default
allowoverlap=no
udpbindaddr=0.0.0.0
tcpenable=no
tcpbindaddr=0.0.0.0
transport=tcp
srvlookup=yes

[9001]
type=friend
host=dynamic
secret=9001

[9002]
type=friend
host=dynamic
secret=9002