User's Manual

Firmware Version 1.0.0.32 UCM6102/6104/6108/6116 USER MANUAL Page 82 of 110
UCM6102/UCM6104/UCM6108/UCM6116 is behind NAT. If it's a
hostname, it will only be looked up only.
External Host
Specifies an external host, which is similar to External Address except
the hostname will be looked up every "External Refresh" interval and
Asterisk will perform DNS queries periodically.
External Refresh
Configures the refresh interval for the external host.
External TCP Port
Configures the externally mapped TCP port when the
UCM6102/UCM6104/UCM6108/UCM6116 is behind a static NAT or
PAT.
External TLS Port
Configures the externally mapped TLS port when
UCM6102/UCM6104/UCM6108/UCM6116 is behind a static NAT or
PAT. The default value is 5061.
Local Network Address
A list of network addresses that are considered inside of the NAT
network. Multiple entries are allowed, e.g., a reasonable set could be as
follows:
192.168.0.0/255.255.0.0
NAT Mode
This is a global NAT setting that will affects all peers and users.
 No: Use rport if the remote side requires it.
 Force rport: Force rport to always be on. This is the default setting.
 Yes: Force rport to always be on and perform comedia RTP
handling.
 Comedia: Use rport if the remote side requires it and perform
comedia RTP handling.
Note:
"comedia RTP handling" refers to the technique of sending RTP to the
port where the other endpoint's RTP comes from. This can also be
rephrased as "connection-oriented media".
Allow RTP Reinvite
When turned on, the UCM6102/UCM6104/UCM6108/UCM6116 will try
to redirect the RTP media stream (audio) to go directly from the caller to
the callee.
 Yes: Enables RTP Reinvite.
 NoNAT: Allows media path redirection (reinvite) but only when the
peer is not be behind NAT. The RTP core can determine if the peer
is behind NAT or not based on the IP address where the media
comes from.
 Update: use UPDATE for media path redirection, instead of INVITE.