Cisco Small Business Pro SPA9000 Administration Manual page 209

SPA9000 Field Reference
Voice tab
SPA9000 Voice System Administration Guide
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Voice tab > SIP page
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).
These settings need to be compatible with the ITSP network settings. The ITSP
NOTE
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
RTP Port Max
RTP Packet Size
Max RTP ICMP Err
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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
Maximum port number for RTP transmission and reception.
Default: 16482
Packet size in seconds, which can range from 0.01 to 0. 1 6.
Valid values must be a multiple of 0.01 seconds.
Default: 0.030
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
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