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Issue 2 December 2007 33
514 Any unused
port number
Transmitted Syslog
messages
UDP
CNAPORT Any
otherwise
unused port
number
Transmitted CNA
registration messages
TCP
The port number specified in
the test request message
50000 Transmitted CNA test results
messages
UDP
System-specific Any unused
port number
Transmitted signaling
protocol packets
TCP
FEPORT or the port number
specified in a CNA RTP test
request
PORTAUD,
which must
be in the
range
specified by
the
RTP_PORT
_LOW and
RTP_PORT
_RANGE
parameters
or the port
number
reserved for
CNA RTP
tests
Transmitted RTP and SRTP
packets
UDP
FEPORT + 1 (if FEPORT is
even) or FEPORT -1 (if
FEPORT is odd) or the port
number specified in a CNA
RTP test request plus or minus
one, as with FEPORT above
PORTAUD +
1 (if
PORTAUD
is even) or
PORTAUD –
1 (if
PORTAUD
is odd) or
the port
number
reserved for
CNA RTP
tests plus or
minus one,
as for
PORTAUD,
above
RTCP and SRTCP packets
transmitted to the far-end of
the audio connection
UDP
Table 6: Transmitted Packets (Source = SIP IP Telephone) (continued)
Destination Port Source Port Use UDP or TCP?
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