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Chapter 4 - AT Commands, S-Registers and Result Codes
Command:
&T n
Values:
Default:
Description:
&T4
&T5
Command:
#T n
Values:
Default:
Description:
#T0
#T1
U n
Command:
Values:
Default:
Description:
U0
U1
U2
U3
Command:
V n
Values:
Default:
Description:
V0
V1
Command:
W
Values:
Description:
Respond to Remote Digital Loopback Signal
n = 4 or 5
5
Enable response to remote digital loopback
signal.
Disable response to remote digital loopback
signal.
Trellis-Coded Modulation
n = 0 or 1
1
Disable trellis-coded modulation.
Enable trellis-coded modulation.
Loopback Test Modes
n = 0, 1, 2, or 3
None
Enable local analog loopback originate mode.
Enable local analog loopback answer mode.
Enable remote digital loopback mode.
Enable local digital loopback mode.
Result Codes (Verbose/Terse)
n = 0 or 1
1
Result codes sent as digits (terse response).
Result codes sent as words (verbose response).
Wait for New Dial Tone
n/a
Inserted in dialing command, causes modem to
wait for a new dial tone. (X2 or X4 must be
selected.)
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