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Rev 3.0 B 2/29/08 51
S-Registers
SRegistersare1byte,volatileregistersusedtostoreconfigu‐
rationdata.Theyareresettothedefaultstatewhenever
modememulationisenabled,ortheATZ/AT&Fcommandis
received.TheycanbesavedtoflashmemorywiththeAT&W
command.Whentheportisopened,thesavedparametersare
appliedtotheport.
Response Codes
&X Any other & command is ignored OK(0)
%X Any % command is ignored OK(0)
+X Any + command is ignored OK(0)
$Xn Any $ command is ignored
including 0 or more digits after the
command.
OK(0)
Command Function Response
Register Contents Default
S0 Automatic Answer(# of RING's) 0 (disabled)
S1 Number of RING's Received 0
S3 Command Line Termination Character CR(13)
S4 Response Formatting Character LF(10)
S5 Command Line Editing Character BS(08)
S12 Guard time on either side of the +++ sequence to
break into command mode. Specified in 50ths of a
second.
50
Result Code
(ATV1)
Numeric (ATV0) Reason
OK 0 Command Successful
CONNECT 1 Connection Established
RING 2 Incoming connection
awaiting answer
NO CARRIER 3 Connection Terminated