Section 29: X.21 Tab
T
ieline
Page 260
T E C H N O L O G Y
29.4.
Manual Default Algorithm
The
Manual Default Algorithm
setting in the
X21
menu relates to the
Manual
Default Profiles
within
Tool
Box.
The setting you choose here will relate to any
Manual Default Profiles
that utilize X21 connections. For example, if you select
G.722
from the drop-down menu, any manual default profile using an ISDN
connection will be programmed to use the G.722 algorithm.
Important Algorithm Selection Information
The manual default profile algorithm settings in the
POTS, GSM LL/GSM/USB-
3G
,
X21
and
ISDN
menus of the
Tool
Box
Profile Editor
, select which algorithm
will be the default for manual default profiles using these connections. For
example, if
Music
is selected in the
Man Dflt Algorithm
setting in the
POTS
menu, all manual default profiles connecting via a POTS connection will use the
Music
algorithm.
This can be overridden in two ways. If you are using the
Connection Setup
(Advanced)
menu to set your connections, you will note that a
Connection Typ
e’s
Algorithm
setting can be changed. If
Any
is the selected algorithm, the algorithm
for each
Connection Type
will be the one selected for manual default profiles, i.e.
the default ones selected in the
POTS, GSM LL/GSM/USB-3G
, and
ISDN
menus. Any other algorithm selections here will override default algorithm
settings in the
POTS, GSM LL/GSM/USB-3G
,
X21
and
ISDN
menus.
Secondly, you can reset the algorithm using the codec itself by accessing the
algorithm selections in the
G
3
codec menus.
29.5.
Sample Rate
If you select one of the MPEG algorithms
you can also select the sample rate you wish
to use from the four available options. The
Samplerate
setting is for all manual default
profiles and will also be used by custom
profiles with connections that use the
Any
setting within the
Algorithm
drop-down
menu in the
Connection Setup
tab.
The sample rate you select will be dependent on the connection profile you are
using. For example, currently only 64kbps X.21 connections are supported so if
you are connecting using a stereo profile with X.21, you will not be able to use a
Samplerate
of 48,000bps. If you do connect at this
Samplerate
the quality will
not be very good. The recommended maximum you should set it at is 32,000bps
for this type of connection. The default
Samplerate
for MP2 algorithms is 32,000
bps.