ZX50 Series IP PBX
ZYCOO all rights reserved V3.1
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Management---->Show Advanced Options ----> Global SIP Settings
--->NAT Support
External IP
Replace your external IP address as your public IP or domain
External Host
Replace your external IP address as your public IP or domain
External Refresh
Set time for refresh, default is 10
Local Network Address
Replace your local network address and mask
NAT mode
If your IP PBX is behind the Router, set default as yes