Avaya J100 Series - Chapter 12: Transferring Calls

Destination port Source port Use Protocol
UDP or TCP
68 Any Received DHCP
messages
UDP
SIP messages initiated
by the call server should
be sent to the port
number specified by the
value of SIPPORT
(TCP). Responses to
SIP messages initiated
by the phone should be
sent to the number used
in the Source Port field
of the message from the
phone.
Any Received signaling
protocol
TCP
The number used in the
Source Port field of the
DNS query that the
phone sends
Any Received DNS
messages
UDP
The number used in the
Source Port field of the
SNTP query that the
phone sends
Any Received SNTP
messages
UDP
161 Any Received SNMP
messages
UDP
Related links
TCP and UDP ports on page 72
Transmitted packets (source = SIP phone)
Destination port
Source port Use Protocol
UDP or TCP
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
Table continues…
TCP and UDP ports
April 2020 Installing and Administering Avaya J100 series IP Phones in an Open SIP
environment 73
Comments on this document? infodev@avaya.com