Voip Settings - Gigaset DE900 IP PRO User Manual

Saving settings
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Click on Save to save your settings on the QoS Settings screen.

VoIP settings

On this screen you configure the ports for establishing VoIP connections.
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Settings Network and Connections
"Listen ports" for VoIP connections
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Select the ports on which your phone expects incoming VoIP connections.
Use random ports
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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.
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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 number in the SIP port field. If you enter an odd number, the next low-
est 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 simi-
lar to STUN (
NAT firewalls.
Saving settings
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Click on Save to save your settings on the VoIP Settings screen.
VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
Configuring phone settings via the Web configurator
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Page 109), a Session Initiation Protocol (SIP) method for overcoming
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VoIP Settings
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