Hi Nypon,
Here is the sip and extension configuration of this extension.
***sip.conf
[101]
type=friend
context=testing
host=dynamic
port=8080
username=101
secret=101
canreinvite=no
dtmfmode=rfc2833
insecure=port,invite
disallow=all
allow=ulaw
allow=alaw
allow=g729
allow=gsm
allow=ilbc
allow=h263
allow=speex
allow=g722
callerid=“101” <101>
nat=yes
qualify=4000
language=en
***extension.conf
exten => 101,1,Dial(SIP/101)
Hi David,
I have change the sip client but still getting the same issue.thanks