Gigaset S540 IP User Manual page 85

Web configurator
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
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 just as with Never,
irrespective of the selected mode.
Outbound proxy
Enter the (fully qualified) DNS name or
the IP address of your provider's out-
bound proxy.
Note:
With many providers, the outbound proxy is
identical to the SIP proxy.
Outbound proxy port
Enter the number of the communica-
tion port used by the outbound proxy.
The default port is 5060.
84
Area:
You can influence the quality of your VoIP
connections via the parameters in the
Voice codecs
guage codecs used, you can activate/deac-
tivate "Silence Suppression" and specify
the language and earpiece volume
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).
= or
No
The choice of voice codec is a compromise
between voice quality and 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:
G729
Average voice quality. The necessary
bandwidth is less than 8 Kbit/s per
voice connection.
To save additional bandwidth and
transmission capacity, on VoIP connec-
tions that use codec
press the transmission of language
packages in pauses ("Silence Suppres-
sion", option
Then, instead of the background noises
in your environment, your caller hears
a synthetic noise generated in the
receiver.
Please note: "Silence Suppression" can
sometimes lead to deterioration in the
voice quality.
Voice codecs
area. In addition to the lan-
G729
Enable Annex B for
(VoIP
you can sup-
G729).