TCP and UDP ports
9600 Series IP Deskphones use different protocols, such as TCP, TLS, and UDP to communicate
with other equipment in the network. Part of this communication identifies which TCP or UDP ports
each piece of equipment uses to support each protocol and each task within the protocol.
Depending on your network, you need to know what ports or ranges are used in the operation of
the phones.
Received packets (destination = SIP phone)
Destination port Source port Use Protocol
UDP or TCP
The number used in the
Source Port field of the
packets that the HTTP
client of the phone sends
Any Packets that the HTTP
client of the phone
receives
TCP
The number used in the
Source Port field of the
TLS/ SSL packets that
the HTTP client of the
phone sends
Any TLS/SSL packets that
the HTTP client of the
phone receives
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)
or to the port number
specified by the value of
SIP_PORT_SECURE
(TLS over 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
Table continues…
TCP and UDP ports
January 2020 Installing and Administering Avaya 9601/9608/9611G/9621G/9641G/9641GS IP
Deskphones SIP 77
Comments on this document? infodev@avaya.com
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