Paradyne 3821PLUS User Manual
Page 79
AT Commands and S-Registers
4-7
3821-A2-GB20-30
February 1998
Table 4-1
(5 of 13)
3821
Plus AT Commands
″
F – Clear Error Buffer
Clears the buffer where information about the last critical error is stored. For service personnel use only.
″
F
Clear error buffer.
″
H
n – V.42bis Compression
Enables or disables V.42bis data compression.
″
H,
″
H0
Disable.
″
H1 Transmit
only.
″
H2 Receive
only.
″
H3
Enable for transmit and receive.
&&P1 – Clone Remote
Copies the firmware from the modem that receives the command to another 3821
Plus modem. The modem must be in
Online Command mode. (Online Command mode is established with the +++ escape sequence.) The initial response to
the command is the message Cloning Remote, or one of several error messages, such as:
NO CIRCUIT
INCOMPATIBLE MODULATION
REMOTE ACCESS DISABLED
INVALID REMOTE PASSWORD
If the cloning is successful, the messages Clone Completed and OK are sent to the DTE. If the cloning fails, the ERROR
result code is preceded by an explanatory message:
Clone Aborted
Clone Failed: COMM
Clone Failed: SEQ
Clone Failed: Incompat. Config.
In the event of an error, the remote modem is placed in download-only mode, signaled by the slow flash of its MR/Pwr
LED. Contact your service representative if you are unable to complete the cloning.
&C
n – LSD Control
Line Signal Detect (LSD) is a signal indicating that the carrier signal is being received from the remote modem. It is
normally turned Off to the DTE when the power level of the received carrier signal drops below the carrier detect
threshold.
&C0
Forced On. LSD ON at all times.
&C1
Standard RS232. LSD is ON when the remote modem’s carrier signal is detected. LSD is Off when
carrier signal is not detected.
&C2
Wink When Disconnect. LSD normally forced ON, turns Off for approximately one second upon
disconnecting.
&C3
Follows DTR. State of LSD follows state of DTR.
&C4
Simulated Control Carrier. State of LSD follows state of remote modem’s RTS via V.13 simulated
control carrier signaling. Note that the remote modem’s RTS Action configuration option must be
set to Simulated Control Carrier.
&C5
DTR/Disconnect Off. State of LSD follows state of DTR except upon a disconnect where LSD
always turns Off. DTR must then toggle Off and ON to turn LSD ON. Use this setting for AT&T
DATAKIT applications. Note that to use this configuration option, the DTR Action configuration
option must be set to Stndrd_RS232 (&D1 or &D2).