TATA SIP WITH ISABEL PBX AND FREEPBX

 

Add route file in /etc/sysconfig/network-script/route-em2 or name of network card

10.51.134.2 via 10.51.135.53 dev em2

serverip             gateway            device name

Add SipAddHeader(P-Preferred-Identity: to extensions.conf

[macro-dialout-trunk-predial-hook]
exten => s,1,SipAddHeader(P-Preferred-Identity:<sip:68176500@10.51.140.18>)
exten => s,n,MacroExit()

save and dialplan reload leave system and asterisk setting as it is
eg sendpid and trustedpid as it is.

For incoming in extensions.conf in from-pstn context

[tata]
exten => _X.,1,Goto(s,1)
exten => s,1,Noop(Let us look deeper into the soul of the invite)
exten => s,n,Set(pseudodid=${SIP_HEADER(To)})
exten => s,n,Set(pseudodid=${CUT(pseudodid,@,1)})
exten => s,n,Set(pseudodid=${CUT(pseudodid,:,2)})
exten => s,n,Goto(trunkinbound,${pseudodid},1)

SIP settings

[TATA]

disallow=all
allow=gsm&ulaw&alaw
type=friend
dtmfmode=rfc2833
context=tata
qualify=yes
insecure=invite,port
nat=yes
host=10.51.140.18
username=68176500
secret=7968176500
defaultexpiry=600
progressinband=yes