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G711 a law / G711 µ law
Excellent voice quality (comparable
with ISDN). The necessary bandwidth is
64 Kbit/s per voice connection.
G726
Good voice quality (inferior to that with
G.711 but better than with G.729).
Your phone supports G.726 with a
transmission rate of 32 Kbit/s per voice
connection.
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In the
VoIP Volume
the amplification level of the voice and
earpiece volume.
With some VoIP providers it may be the
case that the voice/earpiece volume is
too low or too high. Volume regulation
via the handset may then be insuffi-
cient.
You can pre-adjust the volume via the
parameter. You specify
VoIP Volume
whether the adjustable volume range
on the handset should be raised or low-
ered. The following choices are availa-
ble:
Low
Voice/earpiece volume is too low. If you
activate this option the volume is raised
by 6 dB.
Normal
The voice/earpiece volume does not
need to be raised/lowered.
High
Voice/earpiece volume is too high.
If you activate this option the volume is
lowered by 6 dB.
¤
In the
Enable Annex B for G729
whether, when using codec G729,
transmission of data packages for
pauses is to be suppressed (Yes).
parameter, specify
field, state
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Apply the voice codecs that your phone
suggests with outgoing calls into the
Selected codecs
list.
Click in the
Available codecs
voice codec that you want to apply
(you can mark several entries using the
Shift key or the Ctrl key). Click on the
<Add
button.
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Move the voice codecs that you do not
want the phone to use into the
codecs
list.
Also select the voice codec in the
able codecs
list (see above) and click on
the
Remove>
button.
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Sort the voice codecs in the
codecs
list into the order in which they
should be suggested to the receiver
when a connection is established. To
do this, use the
Up
When establishing a VoIP connection, the
phone suggests the 1st voice codec in the
Selected codecs
list to the receiver to begin
with. If the receiving device does not
accept the codec (e.g. because it is not
supported), the 2nd voice codec on the
list is suggested etc.
If the receiver does not accept any of the
voice codecs in the
Selected codecs
connection is not established. An appro-
priate message will be displayed on the
handset.
Notes:
– You should only deactivate codecs (put
them in the
Available codecs
particular reason. The more codecs are
deactivated, the greater the danger that
calls will not be able to be established due
to unsuccessful codec negotiations.
– With incoming calls, all supported voice
codecs are always permitted.
Web configurator
list on the
Available
Avail-
Selected
and
buttons.
Down
list, the
list) if there is a
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