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Web configurator – setting the phone using a PC
Gigaset S675/S685 IP / GBR / A31008-xxxx-xxxx-x-xxxx / web_server.fm / 5/18/09
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8
STUN enabled
Select
Yes
if you want your phone to use STUN as soon as it is used on a router
with asymmetric NAT.
STUN server
Enter the (fully-qualified) DNS name or the IP address of the STUN server on the
Internet (maximum 74 characters).
If you selected
Yes
in the
STUN enabled
field, you must enter a
STUN server
here.
STUN port
Enter the number of the communication port on the STUN server. The default
port is 3478.
STUN refresh time
Enter the time intervals at which the phone should repeat the registration with
the STUN server. The repeat is required so that the entry of the phone in the
tables of the STUN server is retained. The repeat will be carried out for all acti-
vated VoIP phone numbers.
Ask your VoIP provider for the
STUN refresh time
.
The default is 240 seconds.
If you enter 0 seconds, the registration will not be repeated periodically.
NAT refresh time
Specify the intervals at which you want the phone to update its entry in the
NAT routing table. Specify an interval in seconds that is a little shorter than the
NAT session timeout.
As a rule you should not need to change the preconfigured value for the
NAT refresh time
.
Outbound proxy mode
Specify when the outbound proxy should be used.
Always
All signalling and voice data sent by the phone is sent to the outbound
proxy.
Auto
Data sent by the phone is only sent to the outbound proxy when the phone
is connected to a router with symmetric NAT or blocking firewall. If the
phone is behind an asymmetric NAT, the STUN server is used.
If you have set
STUN enabled
=
No
or have not entered a STUN server, the out-
bound proxy is always used.
Never
The outbound proxy is not used.
If you do not make an entry in the
Outbound proxy
field, the phone behaves
independently of the selected mode, as with
Never
.
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