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MultiVOIP User Guide Technical Configuration (T1/E1)
145
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
/40 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.