Siemens GIGASET C475 IP - Manual (Page 140)

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Web configurator – configuring the telephone via a PC
Configuring telephone connections
Gigaset C470-475 IP / EN for IM-Ost / A31008-xxxx-xxxx-x-xxxx / web_server.fm / 18.12.07
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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 activated VoIP phone num-
bers.
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 smaller than the NAT session timeout.
As a rule you should not 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 asymmet-
ric NAT, the STUN server is used.
If you have set
STUN enabled = No or have not entered a STUN server, the outbound 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 independ-
ently of the selected mode, as with Never .
Outbound proxy
Enter the (fully qualified) DNS name or the IP address of your provider's outbound proxy.
Outbound proxy port
Enter the number of the communication port used by the outbound proxy.
The default port is 5060.
Saving settings on the phone
¤
Click Set to save the changes.
The Connections list will be shown after saving (see Figure 3 on page 133).
If you want to reject the changes that have been made, click Cancel .
Clicking Delete will reset all the values back to their default settings. Fields with default set-
tings are empty.
Please note:
With many providers, the outbound proxy is identical to the SIP proxy.