Cisco 521SG Administration Guide - Page 240
RTP Parameters, Max RTP ICMP Err
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Cisco SPA IP Phone Field Reference SIP Tab A RTP Parameters Parameter RTP Port Min RTP Port Max RTP Packet Size Max RTP ICMP Err Description 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. 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. 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. 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. Defaults to 0. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 239