Cisco SPA 500 Series and Wireless IP Phone Field Reference
SIP Tab
Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
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RTP Parameters
Retry Reg RSC
Interval to wait before the IP phone retries registration
after failing during the last registration.
Defaults to blank.
Parameter
Description
Parameter
Description
RTP Port Min
Minimum port number for RTP transmission and
reception. Minimum port number for RTP transmission
and reception. Should define a range that contains at
least 10 even number ports (twice the number of lines);
for example, configure RTP port min to 16384 and RTP
port max to 16402.
Defaults to 16384.
RTP Port Max
Maximum port number for RTP transmission and
reception. Should define a range that contains at least
10 even number ports (twice the number of lines); for
example, configure RTP port min to 16384 and RTP
port max to 16402.
Defaults to 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.
Defaults to 0.030.
Max RTP ICMP Err
Number of successive ICMP errors allowed when
transmitting RTP packets to the peer before the IP
phone terminates the call. If value is set to 0, the IP
phone ignores the limit on ICMP errors.
Defaults to 0.
