CounterPath Bria 2.5 Windows User Guide - Manual (Page 76)

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SIP Account Properties – Topology
Table 7: SIP Account Properties – Topology
Field Description
Firewall Traversal
IP Address This setting controls how your IP address is presented.
• Discover global address: Let Bria determine your public IP address. This is the recommended setting
unless your VoIP service provider advises otherwise.
• Use local IP address: use the IP address of the Bria computer.
The recommended setting is Discover global address.
STUN Server This setting specifies the STUN server to use.
• Discover the server: Choose this option to let Bria find the address of a STUN server.
• Use this server: To use a different STUN server. For the address enter a domain name or an IP address.
The recommended setting is Discover server.
Enable ICE ICE optimizes traffic and may help with firewall traversal.
Typically, ICE is enabled. However, it may need to be disabled if your VoIP service provider has
implemented a firewall traversal solution that is not compatible with ICE enabled.
If you have problems with calls, contact your VoIP service provider for information on their firewall
traversal solution.
XTunnels
Use XTunnels The appropriate setting depends on whether your VoIP service provider has an XTunnels server.
• Automatic: Use Xtunnels when Bria detects a firewall that prohibits communications. This is the
recommended setting if your service provider has an XTunnels server.
• Always: Always use XTunnels.
• Never: Do not use XTunnels. This is the correct setting if your service provider does not have an
XTunnels server.