Yealink SIP-T2 Series, Administrator'S Manual

Page: 723 / 1009

Configuring Advanced Features
701
A firewall protects an organization’s IP network by controlling data traffic from outside
the network. If your IP phone communicates with other devices through a firewall, you
must configure your firewall to allow incoming and outgoing traffic to the IP phone
through the reserved ports and the required ports.
You must configure your firewall to allow incoming and outgoing traffic through the
following ports:
Port Port Type Description
5060 UDP SIP (default transport protocol)
5060 TCP
SIP (when selecting the TCP transport
protocol)
5061 TCP
SIP (when selecting the TLS transport
protocol)
50000-50249
(default range)
TCP/UDP
Reserved ports on the IP phone.
For more information, refer to
Reserved Ports on page 701 .
By default, the IP phone communicates through UDP ports in the 50000 - 50249 range for
video and voice control. The phone uses only a small number of these ports during a
call. The exact number depends on the number of participants in the call, the protocol
used, and the number of ports required for the type of call: video or voice. It is only
applicable to SIP VP-T49G IP phones.
The following tables identify the number of ports required per connection by protocol
and the type of call.