Saving/rejecting settings, Related topics – Siemens 2000 User Manual
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– G.729A/B preferred (low bandwidth) /
G.729A/B only (low bandwidth)
The voice quality is better than for G.723. The necessary bandwidth
is about
8 Kbit/s per voice connection. The delay is about 15 ms.
– G.722 preferred (high quality)
The voice quality is very good. The necessary bandwidth is 64 Kbit/s
per voice connection. The delay is about 1,625 ms.
Procedure when establishing a connection:
If you select a Codec as "preferred", the handset suggests the Codec each
time it tries to establish a connection. The "preferred" Codec is only used if
the receiving device accepts this particular Codec.
If the receiving device does not accept the Codec (e.g. because it does not
support it), a different Codec (lower quality) is negotiated. The connection
is established by using the negotiated Codec.
If you select a Codec as "only", the handset requests the Codec when estab-
lishing a connection. The connection is not established if the receiving
device does not accept this Codec. An appropriate message will be
displayed on the handset.
RTP Packet Size
Specify the size of the data packet. You can choose between 10 ms, 20 ms,
30 ms and Automatic. Large packets result in a longer execution time
(poorer voice quality) but less network utilisation. Small packets result in a
shorter execution time (improved voice quality) but greater network utili-
sation.
Silence Suppression
When Silence Suppression is activated hardly any data packets are trans-
mitted from the sender during pauses in the conversation. This saves
bandwidth and therefore improves transmission capacity.
In some circumstances, however, Silence Suppression means a deterio-
ration in the voice quality. Slight background noises are also always sent
along with the voice, and when Silence Suppression is activated these are
replaced at the recipient's end by "synthetic" noise. This can irritate the
recipient.
Click on the option to activate Silence Suppression (marked with an arrow)
or to deactivate it.
Saving/rejecting settings
Click on the Apply button to store the changed settings on the handset.
Click on the Undo button if you want to reject the changes.
Related topics