Why my SIP server/VoIP service can't work after upgrading from ZLD to uOS (USG FLEX H)?
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Zyxel_Melen
Posts: 5,170
Zyxel Employee
Zyxel Employee
in Other Topics
uOS does not support SIP transformations function.
If your SIP server behind the firewall and it requires SIP transformations, please check with SIP server vendor how to work without SIP transformations.
If it doesn't require SIP transformations, please check the SIP server's setting and the NAT rules on the firewall.
Zyxel Melen
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