User's Manual

Table Of Contents
116
Setting the phone with the PC
Gigaset A580 IP / US English / A31008-xxxx-xxxx-x-xxxx / web_server.fm / 24.04.2009
Version 8, 03.09.2008
G.711 a law / G.711 µ law
Excellent voice quality (comparable with ISDN). The necessary bandwidth is 64
kbit/s per voice connection.
G.726 Good voice quality (inferior to that with G.711 but better than with G.729).
Your phone supports G726 with a transmission rate of 32 kbit/s per voice con-
nection.
G.729 Average voice quality. The necessary bandwidth is less than or equal to 8 kbit/
s per voice connection.
Both parties involved in the telephone connection (caller/sender and recipient
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 band-
width of your DSL connection) the voice codecs your phone is to use, and spec-
ifying the order in which the codecs are to be suggested when a VoIP connec-
tion is established.
Area:
Settings for Bandwidth
The settings in this area influence all VoIP connections (VoIP phone numbers).
Allow 1 VoIP call only
You can usually make two VoIP calls at the same time on your phone. If, how-
ever, 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.).
¤ Select
Yes after Allow 1 VoIP call only to prevent any further parallel VoIP
phone connections being established.
¤ If you wish to permit two VoIP connections, select
No.
Voice Quality
Default settings for the codecs used are stored in your phone: one setting opti-
mized 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 connec-
tion-specific voice codecs yourself ( ¢ "
Area: Settings for Connections").
Please note
If only one VoIP connection is permitted, the following VoIP network services
will no longer be available:
u Call waiting is not displayed during a call via VoIP.
u External consultation call from a VoIP call
u Toggling and initiating a conference call via VoIP