Cisco Systems SPA9000 manual RTP Parameters section

SPA9000 Field Reference

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RTP Parameters section

The RTP parameters define the specification of the RTP audio packets. The most important parameter is the RTP Packet size (time) which defines the interval of transmission of the RTP packets. It is extremely important that time interval matches the ITSP settings. Its default value is 0.030 (30 milliseconds).

NOTE These settings need to be compatible with the ITSP network settings. The ITSP you use will inform you about any specific setting you need to modify on these areas. These parameters have impact on the signaling and audio reliability.

RTP Port Min	Minimum port number for RTP transmission and reception.
	<RTP Port Min> and <RTP Port Max> should define a range
	that contains at least 4 even number ports, such as 100 –
	106.
	Default: 16384
RTP Port Max	Maximum port number for RTP transmission and reception.
	Default: 16482
RTP Packet Size	Packet size in seconds, which can range from 0.01 to 0.16.
	Valid values must be a multiple of 0.01 seconds.
	Default: 0.030
Max RTP ICMP Err	Number of successive ICMP errors allowed when
	transmitting RTP packets to the peer before the SPA9000
	terminates the call. If value is set to 0, the SPA9000 ignores
	the limit on ICMP errors.
	Default: 0

SPA9000 Voice System Administration Guide 207