Siemens Gigaset C450 IP User Manual

Page 55

Web configurator

Gigaset C450 IP / Greek eng / A31008-M1713-T151-2-8U19 / web_server.fm / 19.9.06

ion 4,

.09.

2005

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

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.