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Web configurator – configuring the telephone via a PC
Optimising voice quality for VoIP connections
Gigaset C470-C475 IP / GBR / A31008-M1916-L101-1-7619 / web_server.fm / 7.2.08
Ve
rs
ion 2.
1,
08.0
1.20
07
G.729
Average voice quality. The necessary bandwidth is less than 8 kbit/s per voice connec-
tion.
Both sides of a phone connection (caller/sender side and receiver side) must use the same
voice codec. The voice codec is negotiated between the sender and the recipient when
establishing a connection.
You can influence the voice quality by selecting (bearing in mind the bandwidth of your
DSL connection) the voice codecs your phone is to use, and specifying the order in which
the codecs are to be suggested when a VoIP connection is established.
Area:
Settings for Bandwidth
The settings in this area influence all VoIP connections (VoIP phone numbers).
Allow 1 VoIP call only
Generally speaking you can make two VoIP calls at the same time on your phone. If,
however, your DSL connection has a narrow bandwidth, there may be problems if two
VoIP calls are made at the same time. The data is no longer transferred properly (long
voice delay, data losses etc.).
¤
Activate
Yes
next to
Allow 1 VoIP call only
to prevent any further parallel VoIP phone
connections being established.
¤
If you wish to permit two VoIP connections, activate the
No
option.
Voice Quality
Default settings for the codecs used are stored in your phone: one setting optimised for
narrow and one for wide bandwidths.
¤
Activate one of the options
Optimized for low bandwidth
/
Optimized for high bandwidth
if
you wish to accept a default setting for all VoIP connections. The settings are shown
in the
Settings for Connections
area and cannot be changed.
¤
Activate the
Own Codec preference
option if you wish to select and set connection-spe-
cific voice codecs yourself (see "Area:
Settings for Connections
").
Please note:
If only one VoIP connection is permitted, the following VoIP network services are
no
longer
available:
– Call waiting
Call waiting is not displayed during a call via VoIP
– External consultation call from a VoIP call
– Toggling and initiating a conference call via VoIP