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MultiVOIP User Guide Technical Configuration (Digital Voips)
141
Voice/Fax Parameter Definitions (cont’d)
Coder Parameters
Coder Manual or
Auto-matic
Determines whether selection of coder
is manual or automatic. When
Automatic is selected, the local and
remote voice channels will negotiate
the voice coder to be used by selecting
the highest bandwidth coder supported
by both sides without exceeding the
Max Bandwidth setting. G.723, G.729,
or G.711 are negotiated.
Selected
Coder
G.711 a/u
law 64
kbps;
G.726, @
16/24/32/4
0 kbps;
G.727, @
nine bps
rates;
G.723.1 @
5.3 kbps,
6.3 kbps;
G.729,
8kbps;
Net Coder
@
6.4, 7.2, 8,
8.8, 9.6
kbps
Select from a range of coders with
specific bandwidths. The higher the bps
rate, the more bandwidth is used. The
channel that you are calling must have
the same voice coder selected.
Default = G.723.1 @ 6.3 kbps, as
required for H.323. Here 64K of digital
voice are compressed to 6.3K, allowing
several simultaneous conversations
over the same bandwidth that would
otherwise carry only one.
To make selections from the Selected
Coder drop-down list, the Manual
option must be enabled.
Max
bandwidth
(coder)
11 – 128
kbps
This drop-down list enables you to
select the maximum bandwidth allowed
for this channel. The Max Bandwidth
drop-down list is enabled only if the
Coder is set to Automatic.
If coder selected automatically, then
enter a value for maximum bandwidth,
as directed by VOIP administrator.