6. DATA COMMUNICATION
6.5.3
Compression settings by AT commands
Note that the compression protocol chosen by the AT command is valid for that
port only.
Some AT commands:
+
A
T
Check which compression protocol is set for the current port.
0=no compression, 1=V.42bis, 2=V.44, 3=negotiation (default)
+
A
T
Sets the current port to use a specific compression protocol, with n=0, 1, 2, 3 as
above.
Only valid when you have selected Automatic in the Handset, see
"compression function".
&
A
T
Saves the port settings. If this command is not run, the port settings are turned
back to default or previous settings after an MES restart.
+
A
T
Reports the connection status; you can for example see the connection speed
(9600kbps), ARQ mode, V.42bis or V.44 etc.
Note: The vtLite Mobile AT mode window can be used to send AT commands to
the port used. Use the Send button. Hyper Terminal may also be used.
6-88
C
O
W
M
P
S
T
C
O
W
M
P
S
T
W
W
X
R
1
=
?
D
n
D
=
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