CounterPath Bria Android Edition 1.1 User Guide (Revision 7) - Manual (Page 33)

Bria Android Edition User Guide
29
Network Traversal Strategy
Speak to your VoIP service provider about the strategy to use. Or leave the
default and just change the STUN Server field.
Select a profile to set a specific combination of STUN, ICE, and DNS SRV:
• Default Configuration: STUN On, ICE Off, DNS SRV On.
Bria will use the specified STUN server to discover the public address of your
device. It will present that public address for SIP signaling and when
negotiating media routing.
• Application Managed: STUN On, ICE On, DNS SRV On.
Bria will use the specified STUN server to discover the public address of your
device. It will present your public address for SIP signaling and both your
public and private addresses when negotiating media routing.
• Server Managed: STUN Off, ICE Off, DNS SRV On.
Bria will present your device’s private address for SIP signaling and when
negotiating media routing. Choose this option if your VoIP service provider
advises you that it has implemented a network-hosted NAT traversal (or far-
end NAT traversal) technology such as a session border controller (SBC),
media proxy or RTP relay.
• User Specified: Set the settings as desired.
Enable rport • On: the outgoing INVITE message will have an rport parameter inside the Via header,
which indicates that Bria supports RFC 3581. If the server also support RFC 3581, the
server should respond with the rport parameter set to the incoming public IP port and
the received parameter set to the public IP address. This is the default behavior in
previous Bria versions.
• Off: Bria does not have the rport parameter in the Via header.
If your calls drop within 30 seconds to 2 minutes after the call is successfully established,
try different combinations of rport and PRACK: off/on, on/on, on/off).
If none of these combinations solve the problem, turn both the settings off again
(default).
Enable PRACK • On: Bria advertises that it supports “100rel” and allows PRACK, as defined in RFC
3262. The outgoing INVITE message will have “100rel” in the Supported header and
“PRACK” in the Allow header. This is the default behavior in previous Bria versions.
• Off: Bria will not advertise these features; there will be no “100rel” in the Supported
header.
If your calls drop within 30 seconds to 2 minutes after the call is successfully established,
try different combinations of rport and PRACK: off/on, on/on, on/off).
If none of these combinations solve the problem, turn both the settings off again
(default).
Field Description
STUN • On (checked): Bria will use a STUN server to discover your public IP address.
• Off: Bria does not discover your public IP address. Therefore, only the private IP
address will be used. Typically in this case, Global IP should be turned off.
Field Description