53

Any unused port number

Transmitted DNS messages

UDP

67

68

Transmitted DHCP messages

UDP

80, unless explicitly specified otherwise

Any unused port number

Packets transmitted by the HTTP client of the phone

TCP

123

Any unused port number

Transmitted SNTP messages

UDP

The number used in the Source Port field of the SNMP query packet received by the phone

161

Transmitted SNMP messages

UDP

443, unless explicitly specified otherwise

Any unused port number

TLS/SSL packets transmitted by the HTTP client of the phone.

TCP

514

Any unused port number

Transmitted Syslog messages

UDP, TLS for secure syslog

The port number specified in the test request message

50000

Transmitted CNA test results messages.

Transmitted SLA Mon™ agent test results messages

UDP

System-specific

Any unused port number

Transmitted signaling protocol packets

TCP

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

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 packets transmitted to the far-end of the audio connection

UDP

RTCPMONPORT

PORTAUD + 1 (if PORTAUD is even) or PORTAUD – 1 (if PORTAUD is odd)

RTCP packets transmitted to an RTCP monitor

UDP

System-specific

Any unused port number

Transmitted signaling protocol packets

UDP