:> /etc/asterisk/sip.conf
nano /etc/asterisk/sip.conf
[general]
allowguest=no
autocreatepeer=no
alwaysauthreject=yes
[101]
secret=specialist123
type=friend
context=phones
host=dynamic
dtmfmode=auto
disallow=all
allow=alaw
allow=ulaw
[102]
secret=specialist123
type=friend
context=phones
host=dynamic
dtmfmode=auto
disallow=all
allow=alaw
allow=ulaw
asterisk -rvvv
CLI> sip reload