So for starts Site one Local IP is a 172...* and External is 216...* behind a pfSense Firewall
Destination Site is Local 192...* external is 209...* behind a Unifi USG-4-Pro
SIP Trunk Provider is 208...*
Trunk Settings at the destination are
Name: 1705******* (actual phone number)
USER Context: 705*******
Registration Sting : 1705*******:[REDACTED PASSWORD]:[REDACTED USERACCOUNT]@208.../1705******~120
Asterisk SIP Settings : External Address on each site is auto detected and is its respective IP
Local Networks: Internal Address on each site is auto detected and is its respective IP
Destination site NAT Settings:
IP Configuration: Public IP
Local Site NAT Settings:
IP Config : Static
Override External IP: Is not set but shows correct IP shadowed.
So the destination IVR Work’s So long as its not out local site calling We can call from anything else (cell phone, Land lines from another building, etc)
This error has presented itself in one other way as well. We have another site irrelevant to the one above where we can hear them but they can’t hear us.
A captured packet given to us but our SIP provider shows the following:
s=Asterisk PBX 14.7.5.
c=IN IP4 192...*
m=audio 19796 RTP/AVP 0 8 101.
I have read other posts and enabled DTMF logging and nothing shows up on the destination IVR but its logged on out side as sent.
I have done PCAP’s from the FreePBX Server and Firewall as well as my PC and it shows a DTMF signal being sent on all steps.
I have also tested by using 2 different phones 1 Softphone (X-lite Free) and a Astra 6739i