AT Commands F-15
AT Commands
E
n Command Echo
E0
Inhibits the echoing of commands to the local device.
E1
Echoes commands to the local device.
%E
n Auto-Retrain
%E0
Disables the automatic retrain sequence.
%E1
Enables the automatic retrain sequence (at 2400 bps or higher).
When %E1 is set and line quality is too poor to sustain communications, the modem
tries up to three times to resynchronize the modems (for a total of up to six seconds)
before hanging up. The TST indicator lights during auto-retraining. The modem can
retrain during connections at 2400 bps or higher. Use ATO1 to force the retrain
sequence when %E0 is set.
NOTE
The modem ignores %E0 during V.34, V.32bis and V.32 connections.
2
0
DCD On (Off for a few seconds at disconnect only),
DSR On, CTS On
2
1
DCD, DSR, and CTS On (Off for a few seconds at
disconnect)
2
2
DCD, DSR, and CTS On (Off for a few seconds at
disconnect)
2
3
DCD Off at disconnect then On, DSR complies with
the ITU-T recommendations, CTS On
2
4
DCD On (Off for a few seconds at disconnect), CTS/
DSR comply with the ITU-T recommendations
&C
\D
Result
