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48 Chapter 7 Special Features: Modem Emulation
ATLn Accepted but ignored.
OK n=0 or 3
ERROR
Otherwise
ATMn Accepted but ignored.
OK n=0 or 3
ERROR
Otherwise
ATNn Accepted but ignored.
OK n=0 or 1
ERROR
Otherwise
ATOn
Return to On-Line Data Mode.
This command determines how the modem will enter the on-line data mode.
If the modem is in the on-line command mode, the modem enters the on-
line data mode. If the modem is in the off-line command mode (no connec-
tion), ERROR is reported.
O0Enters on-line data mode. Handling is determined by the Call Establish-
ment task. Generally, if a connection exists, this command connects the
DTE back to the remote modem after an escape (+++).
O1Same as above
OKn = 0 or 1 and
a connection
exists.
ERROR
Otherwise or if
not connected.
ATP Accepted but ignored.
OK
ATQn
Quiet Results Codes Control command.
The command enables or disables the sending of the result codes to the
DTE according to the parameter supplied. The parameter value, if valid, is
written to S14 bit 2.
Q0 Enables result code to the DTE (Default).
Q1 Disables result code to the DTE
OK n=0 or 1
ERROR
Otherwise
ATSn
Read/Write S- Register.
n Establishes S-register n as the last register accessed
n=v Sets S-Register n to the value v.
n? Reports the value of S-Register n.
ATT Accepted but ignored..
OK
ATVn
Result Code Form. This command selects the sending of short-form or long-
form codes to the DTE. The parameter, if valid, is written to S14 bit 3.
V0 Enables short-form (terse) result codes. Line feed is not issues before a
short-form result.
V1 Enables long-form (verbose) results codes (Default).
OK n=0 or 1
ERROR
Otherwise
ATWn Accepted but ignored.
OK n=0 to 3
ERROR
Otherwise
ATXn Accepted but ignored.
OK n=0 to 3
ERROR
Otherwise
ATYn Accepted but ignored.
OK n=0 or 1
ERROR
Otherwise
ATZn Accepted but ignored. (Soft Reset and restore Profile).
OK n=0 or 1
ERROR
Otherwise
AT&Cn
DCD Option. The Digi Device Server controls the DCD output in accor-
dance with the parameter supplied. The parameter value, if valid is written
to S21 bit 5.
&C0 DCD remains ON at all times.
&C1 DCD follows the state of the connection
OK n=0 or 1
ERROR
Otherwise
AT
Command
Function
Result
Code