CounterPath Bria iPhone Edition 1.2 User Guide - Manual (Page 28)

CounterPath Corporation
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UDP Keep Alive - WiFi
Interval A “keep alive” message is a mechanism for maintaining a “pinhole” through your firewall so that
phone calls proceed smoothly. The interval specifies how often the message is sent (in seconds).
If you are experiencing problems during a WiFi call (a call made over the WiFi internet
connection), try setting this interval to a lower number such as 20.
UDP Keep Alive - Cell
Interval Same as above, except the interval applies to calls made over the 3G network, which can be made
on an iPhone (but not an iPod) when you are not in a WiFi zone.
Field Description