That feature works from *Flashphoner-1.0.3.512-p.618* version
TOS - Type of Service in the Internet Protocol Suite
see http://www.faqs.org/rfcs/rfc1349.html
Usage:
Add such properties in flashphoner.properties:
sip_traffic_class=28
rtp_traffic_class=28
Flashphoner uses JDK 1.6 DatagramSocket.html.setTrafficClass(int) method for outgoing SIP and RTP packets respectively.
Example:
sip_traffic_class=28
It means: 00011100
or
LOWDELAY, THROUGHPUT, RELIABILITY, 0, 0