User guide

Modem Emulation AT Command Set
Chapter 8 Modem Emulation 41
AT&F n
Restore Factory Configuration (Profile)
The Device Server loads the factory default configuration (profile). The factory defaults
are identified for each command and in the S-Register descriptions. A configuration
(profile) consists of a subset of S-Registers.
&F0Restore factory configuration 0.
&F1Restore factory configuration 1.
OK n=0 or 1
ERROR Otherwise
AT&Jn Accepted but ignored. OK n=0 or 1
ERROR Otherwise
AT&Gn Accepted but ignored. OK n=0 or 1
ERROR Otherwise
AT&Jn Accepted but ignored. OK n=0 or 1
ERROR Otherwise
AT&Kn Flow control. This command defines the DTE/DCE flow control mechanism. The
parameter value, if valid, is written to S39 bits 0, 1, and 2.
&K0 Disables flow control
&K3 Enables RTS/CTS flow control (Default)
&K4 Enables XON/XOFF flow control
&K5 Enables transparent XON/XOFF flow control
&K6 Enables both RTS/CTS and XON/XOFF flow control.
OK n=0,3,4,5,or 6
ERROR Otherwise
AT&L n Accepted but ignored. OK n=0, 1, 2
ERROR Otherwise
AT&M n Accepted but ignored. OK n=0, 1, 2
ERROR Otherwise
AT&Pn Accepted but ignored. OK n=0, 1, 2
ERROR Otherwise
AT&Q n Accepted but ignored. OK n=0 to 8
ERROR Otherwise
AT&Rn RTS/CTS Option
This selects how the Digi Device Server controls CTS. CTS is modified if hardware flow
control is selected (see &K command). The parameter value, if valid, is written to S21
bit2.
&R0CTS reflects the ability of the modem to transmit data. For example, CTS
will drop during retrains. In sync mode, CTS tracks the state of RTS; the RTS-to-
CTS delay is defined by S26. In async mode, CTS is normally ON and will turn
OFF only if required by flow control.
&R1CTS forced on (default). In sync mode, CTS is always ON (RTS transitions
are ignored). tracks the state of RTS. In async mode, CTS is normally ON and
will turn OFF only if required by flow control.
&R2CTS follows RTS.
OK n=0 or 1
ERROR Otherwise
AT&S n
DSR Override
This command selects how the modem will control DSR. The parameter value, if valid, is
written to S21 bit 6.
&S0DSR will remain ON at all times. (Default.)
&S1DSR will become active after answer tone has been detected and inactive
after the carrier has been lost.
OK n=0 or 1
ERROR Otherwise
AT&T n Accepted but ignored. OK n= 0
ERROR Otherwise
AT&V
Display Current Configuration and Stored Profiles
There is no NVRAM support currently.
OK
AT&Vn Accepted but ignored. OK n=0 to 5
ERROR Otherwise
AT&V6 Display current IP settings of the Device Server OK