Optimising Voice Quality For Voip Connections - Siemens GIGASET A580 User Manual

Please note
If you do not use your Gigaset.net connection for six weeks, it is automatically
deactivated. You cannot be reached for calls from Gigaset.net.
The connection is reactivated:
u
as soon as you start a search in the Gigaset.net directory (
u
make a call via Gigaset.net, i.e. dial a number ending in #9 (two attempts
may be necessary) or
u
activate the connection via the Web configurator as described above.
Activating/deactivating the STUN server of the Gigaset.net connection
The Gigaset.net connection is preconfigured in your phone. The Gigaset.net
uses a STUN server as standard. In the sent data packets, Gigaset.net replaces
the private IP address of your phone with its public IP address.
If you operate your phone behind a router with symmetrical NAT, STUN cannot
be used. Otherwise, when making Gigaset.net calls you will not be able to hear
the caller.
In this case, deactivate STUN for the Gigaset.net connection.
¤
Open the following Web page:
¤
Select
STUN enabled
Select No
Select
Yes
¤
Select

Optimising voice quality for VoIP connections

You can make general and connection-specific settings to improve the voice
quality for VoIP telephony.
¤
Open the following Web page:
The voice quality for VoIP connections is mainly determined by the voice codec
used for transferring the data and the available bandwidth of your DSL con-
nection.
In the case of the voice codec, the voice data is digitalised (coded/decoded) and
compressed. A "better" codec (better voice quality) means more data needs to
be transferred, i.e. perfect voice data transfer requires a DSL connection with a
larger bandwidth.
The following voice codecs are supported by your phone:
Excellent voice quality. The broadband speech codec
G.722
bit rate as G.711 (64 kbit/s per speech connection) but with a higher sampling
rate. This allows higher frequencies to be played back. The speech tone is there-
fore clearer and better than for the other codecs (High Definition Sound Per-
formance).
Gigaset S67H, S68H and SL37H handsets, for example, are HDSP-compatible.
in the
Edit Gigaset.net
to deactivate STUN.
if you want your phone to use STUN.
to save the changes.
Set
Web configurator – setting the phone using a PC
¢
Settings Telephony
area.
¢
Settings Telephony
£
Page 47) or
¢
Connections.
¢
Audio.
works at the same
G.722
121