Siemens Gigaset C450 IP - Manual (Page 55)

54
Web configurator
Gigaset C450 IP / Greek eng / A31008-M1713-T151-2-8U19 / web_server.fm / 19.9.06
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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
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
outbound proxy is always used.
Never
The outbound proxy is not used.
If you do not make an entry in the
Out-
bound proxy field, the phone behaves
independently of the selected mode,
just as with Never .
Outbound proxy
Enter the (fully qualified) DNS name or
the IP address of your provider's out-
bound proxy.
Outbound proxy port
Enter the number of the communica-
tion port used by the outbound proxy.
The default port is 5060.
Area: Voice codecs
You can influence the quality of your VoIP
connections via the parameters in the
Voice codecs area. In addition to the lan-
guage codecs used, you can activate/
deactivate "Silence Suppression" and
specify the language and earpiece volume
( VoIP Volume ).
Your phone supports various voice Codecs
for digitalising (coding and decoding)
voice data. The voice Codec used on a
phone connection has a significant influ-
ence on the voice quality, e.g. through the
time need to code/decode (voice delay).
The choice of voice Codec is a compromise
between voice quality and the necessary
bandwidth.
Both sides of a phone connection (caller/
sender side and receiver side) must be
using the same voice Codec. The voice
Codec is negotiated between the sender
and the recipient when establishing a con-
nection.
Set the voice Codec that your phone sug-
gests when establishing a VoIP connec-
tion.
You can choose between the following
voice Codecs supported by your phone:
Note:
With many providers, the outbound proxy is
identical to the SIP proxy.