Comments
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Thank you for the tips. I was able to monitor the old (Zyxel) router and narrow down the culprit to UDP Port 4500. When I open that port up WAN>LAN on the SonicWALL, wireless calls happen flawlessly, which is great but does concern me security-wise. Is there a better way to retain the functionality without just opening up…
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Thank you. I'll be at the customer's site tomorrow and will give that a shot.
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Thank you for following up @TIJU. Any help you or @Protim can offer would be greatly appreciated.