Polycom SIP 3.1 manual RTP rtp, These parameters apply to RTP packets

				Configuration Files
	RTP <rtp/>
	These parameters apply to RTP packets.
		Permitted
Attribute		Values	Default	Interpretation
qos.ip.rtp.dscp		0 to 63 or	Null	This parameter allows the DSCP of
		EF or		packets to be specified. If set to a
		any of		value, this will override the other
		AF11,AF12,		qos.ip.rtp… parameters. Default
		AF13,AF21,		of Null which means the other
		AF22,AF23,		qos.ip.rtp… parameters will be
		AF31,AF32,		used.
		AF33,AF41,
		AF42,AF43
qos.ip.rtp.min_delay		0, 1	1	If set to 1, set min-delay bit in the IP
				TOS field of the IP header, or else
				don’t set it.
qos.ip.rtp.max_throughput		0, 1	1	If set to 1, set max-throughput bit in
				the IP TOS field of the IP header, or
				else don’t set it.
qos.ip.rtp.max_reliability		0, 1	0	If set to 1, set max-reliability bit in
				the IP TOS field of the IP header, or
				else don’t set it.
qos.ip.rtp.min_cost		0, 1	0	If set to 1, set min-cost bit in the IP
				TOS field of the IP header, or else
				don’t set it.
qos.ip.rtp.precedence		0-7	5	If set to 1, set precedence bits in the
				IP TOS field of the IP header, or
				else don’t set them.

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