User's Manual

SME VoIP System Guide, Version 2.6
Proprietary and Confidential
Chapter:
SME VoIP Administration Interface
42
5.5.4 NAT Settings
We define some options available when NAT aware routers are enabled in the network.
Screenshot
Parameter
Default Values
Description
Enable STUN
Disabled
Enable to use STUN
STUN Server
NA
Permitted value(s): AAA.BBB.CCC.DDD (Currently only Ipv4 are
supported) or url (e.g.: firmware.rtx.net).
STUN Bindtime
Determine
Enabled
STUN Bindtime
Guard
80
Permitted values: Positive integer default is 90, unit is in seconds
Enable RPORT
Disabled
Enable to use RPORT in SIP messages.
Keep alive time
90
This defines the frequency of how keep-alive are sent to maintain
NAT bindings.
Permitted values: Positive integer default is 90, unit is in seconds
5.5.5 SIP/RTP Settings
These are some definitions of SIP/RTP settings:
Screenshot
Parameter
Default Values
Description
Use Different
SIP Ports
Disabled
If disabled, the Local SIP port parameter specifies the source port
used for SIP signalling in the system.
If enabled, the Local SIP Port parameter specifies the source port
used for first user agent (UA) instance. Succeeding UA’s will get
succeeding ports.