Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
SIT2 RSC
SIT3 RSC
SIT4 RSC
Try Backup RSC
Retry Reg RSC
RTP Parameters
Parameter
RTP Port Min
RTP Port Max
Description
SIP response status code to INVITE on which to play
the SIT2 Tone.
Defaults to blank.
SIP response status code to INVITE on which to play
the SIT3 Tone.
Defaults to blank.
SIP response status code to INVITE on which to play
the SIT4 Tone.
Defaults to blank.
SIP response code that retries a backup server for the
current request.
Defaults to blank.
Interval to wait before the IP phone retries registration
after failing during the last registration.
Defaults to blank.
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.
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