Grandstream Networks UCM630X Series - Figure 3: SIP Signaling Penetration - NAT Settings; Table 1: NAT Settings

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Figure 3: SIP Signaling Penetration - NAT Settings
• Configure External Host with the public network address of the UCM630X.
• Configure the External UDP Port, External TCP Port, and/or External TLS Port fields based on the
router mappings created in the previous step.
• Configure Local Network Address with the UCM630X’s local network subnets.
Table 1: NAT Settings
NAT Settings
External Host
Configure the IP address or domain that would be used in outbound SIP
messages if the UCM is behind a NAT. Typically, this would be the public network
address.
Use IP Address in
SDP
If enabled, the SDP connection will use the IP address resolved from the external
host.
Get External IP via
STUN
If enabled, the external IP address will be retrieved via STUN. Please confirm the
configured STUN server is working properly.
External UDP Port
Configure the externally mapped UDP port when the UCM is behind a static NAT
or PAT.
External TCP Port
Configure the externally mapped TCP port when the UCM is behind a static NAT
or PAT.