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Extended AT& Command Set
Command
&Bn
&Cn
&Dn
&F
&Hn
&Sn
AT Commands
Var
Description
Data rate, terminal-to-modem
DTE/DCE rate fixed at DTE setting
1
Carrier Detect signal status
Forced to On continuously (Default)
0
Follows the status of remote carrier signal
1
Date Terminal Ready (DTR) operations
DTR off causes modem to hang up
2
Load the default factory settings
Data flow control, DTE/DCE
Flow control disabled
0
Hardware (RTS/CTS) flow control
3
Software (Xon/Xoff) flow control
4
Data Set Ready (DSR)
DSR overridden, DSR always on
0
Internet Server User's Guide
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