Elastix

asterisk -vrrrrr
sip show peers
sip show settings
sip reload

vi /etc/asterisk/sip_general_custom.conf
allow=g729
videosupport=yes
allow=h261
allow=h263
allow=h263p
allow=h264
allow=g723
bindport=5060

:nat
externip=xxx.xxx.xxx.xxx
localnet=192.168.0.0/24

maxexpiry=300

vi /etc/asterisk/chan_dahdi.conf
callerid=asreceived
cidsignalling=dtmf
cidstart=dtmf

busydetect=yes
busycount=3
busypattern=500,500

or
cidsignalling=v23
cidstart=polarity

amportal restart

Peer '888' is now UNREACHABLE
If it is mobile device and always show UNREACHABLE, this account set to Unmonitored should be better
qualify no

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