Not recieving incoming calls outside of the office network?

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My office uses barracuda cudatel as our sip provider.  When I set it up, everything works fine at my office.  Whenever I am outside of my office network, I don't receive incoming calls but I can still plce outgoing calls. I have whitelisted it on my firewall but the problem still persists.  

Any feedback on how to fix this would be greatly appreciated.

asked Dec 20, 2016 in Windows by bzobes87 (120 points)  
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