elmeg IP120 / en / elmegIP120_v1 / web_configurator.fm / 01.08.2012
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rsion 2, 27.0
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elmeg IP120
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Configuring phone settings via the Web configurator
STUN enabled
Click on
Yes
if you want your phone to use STUN as soon as it is used on a router with asym-
metric NAT.
STUN Server Address
Enter the DNS name or the IP address of the STUN server on the Internet. If you have selected
Yes
in the
STUN enabled
field, then you must complete this field.
STUN Server Port
Enter the number of the communication port on the STUN server.
The default port is 3478.
STUN Refresh Time [sec]
Enter the time intervals (seconds) at which the phone should repeat the registration with the
STUN server. The repeat is required so that the phone's entry in the tables of the STUN server
is retained. The repeat will be carried out for all activated VoIP phone numbers. Ask your VoIP
provider for the STUN refresh time if necessary. The default setting is 30 seconds.
NAT Refresh Time [sec]
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 change the default value for the NAT update. The default setting is 20
seconds.
Outbound Proxy Mode
Specify when the outbound proxy should be used.
If you leave the
Outbound Server Address
field empty, the phone does not respond to the
selected mode and operates as if
Never
were selected.
Outbound Server Address
Enter the DNS name or the IP address of your provider's outbound proxy. With many provid-
ers, the outbound proxy is identical to the SIP proxy.
Outbound Proxy Port
Enter the number of the communication port used by the outbound proxy. The default port
is 5060.
Automatic Negotiation of DTMF Transmission
DTMF signalling is required, for example, for querying and controlling certain network mail-
boxes via digit codes or for remote operation of the local voice mail. Select whether the set-
ting should be made automatically. If you select
No
, you must determine the setting for the
DTMF transfer yourself.
Always
All signalling and voice data sent by the phone is sent to the outbound
proxy.
Automatically
Data sent by the phone is only sent to the outbound proxy when the
phone is connected to a router with symmetric NAT or a blocking firewall.
If the phone is behind an asymmetric NAT, the STUN server is used. If you
have set
STUN enabled
to
No
, or if you have not entered a STUN server,
the outbound proxy will be used in all cases.
Never
The outbound proxy is not used.
