18
Network and connectors
Maxwell 10 / en / A31008-N4001-R102-1-20 / web_configurator.fm / 22.01.2014
Te
mplat
e
A4, V
e
rsion 1, 0
3.04.2012
VoIP settings
On this screen you configure the ports for establishing VoIP connections.
Settings
Network and Connections
VoIP Settings
"Listen ports" for VoIP connections
Use random ports
¤
Select
Yes
if the phone should use any available ports for the SIP port and RTP port instead of fixed
ports.
The use of random ports is advisable if you want multiple phones to be operated on the same
router/gateway with NAT. The phones must then use different ports so that the NAT for the router/
gateway is only able to forward incoming calls and voice data to one (the intended) phone.
¤
If you click on
No
, the phone uses the ports specified in
SIP port
and
RTP port
.
SIP port
Specify the local communication port that the phone should use to send and receive signalling
data. Specify a number between 1024 and 49152. The default port number for SIP signalling is
5060.
RTP port
Specify the local communication port that the phone should use to receive voice data. Enter an
even number between 1024 and 49152. The port number must not be the same as the port num-
ber in the SIP port field. If you enter an odd number, the next lowest even number will be selected
automatically (e.g., if you enter 5003, then 5002 is set automatically). The default port number for
voice transmission is 5004.
ICE enabled
Choose whether or not to use ICE (Interactive Connectivity Establishment). ICE is similar to STUN
(
) a Session Initiation Protocol (SIP) method for overcoming NAT firewalls.
Saving settings
¤
Click on
Save
to save your settings on the
VoIP Settings
screen.
¤
Select the ports on which your phone
expects incoming VoIP connections.
