Figure 3: Sip Signaling Penetration - Nat Settings; Table 1: Nat Settings - Grandstream Networks UCM630X Series Setup Manual

•
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.
NAT Settings
Configure the IP address or domain that would be used in outbound SIP
External Host messages if the UCM is behind a NAT. Typically, this would be the public network
address.
Use IP Address in If enabled, the SDP connection will use the IP address resolved from the external
SDP host.
Get External IP via If enabled, the external IP address will be retrieved via STUN. Please confirm the
STUN configured STUN server is working properly.
Configure the externally mapped UDP port when the UCM is behind a static NAT
External UDP Port
or PAT.
Configure the externally mapped TCP port when the UCM
External TCP Port
or PAT.

Figure 3: SIP Signaling Penetration - NAT Settings

Table 1: NAT Settings

behind a static NAT
is
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