Grandstream Networks UCM630X Series - Page 8

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External TLS Port
Configure the externally mapped TLS port when the UCM is behind a static NAT
or PAT. The default setting is 5061.
Local Network
Address
Configure a list of subnets under the internal network. Multiple entries are
supported. This must be configured for successful NAT traversal.
Example:
192.168.0.0/16
If properly configured, users can then register their extensions to the UCM630X’s public network address
and port. If one-way audio issues are encountered, please confirm your NAT settings (SIP signaling
traversal) and SIP/RTP ports (media traversal) on the UCM and/or router. For details about media
traversal configuration, please see the Media Traversal section below.