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4. AT Command Set and S-Registers
4-153830-A2-GB91-30 August 1998
Table 4-2
(9 of 23)
Model 3830 AT Commands
&D
n
DTR Action
Data Terminal Ready (DTR) is a signal from the DTE to the modem
indicating that the DTE is connected and ready for operation.
&D0 Ignore. Modem ignores the true status of DTR and treats it as
always ON.
&D1 Off=Command Mode. Modem enters online Command Mode if
connected when DTR switches off.
&D2 Standard EIA-232. DTR Signal is controlled by the DTE.
&D3 Off=Reload Strap. Follows Standard EIA-232 operation, except that
when DTR switches Off, the modem loads the Active (Saved) area into
the Active (Operating) area.
&D4 Controls On-Hook. Follows Standard EIA-232 operation, except that
modem does not disconnect until DTR is lowered by the DTE.
&F
n
Select Factory Default Configuration Options
Loads factory configuration options into the Active (Operating) area. &F5
and &F6 are valid only if Enhanced Throughput Cellular (ETC) is
installed.
&F0 Async Dial
&F3 UNIX Dial
&F5 Cellular (Mobile)
&F6 Cellular (PSTN)