Verilink Productivity 500 (34-00236) Product Manual - Manual (Page 51)

Option Configuration 500 TA Page 51
Always On except during disconnect - Use the &C2 command to force DCD to
always be on except during a disconnect. The S10 command determines how
long the DCD signal will remain off after a disconnect.
NOTE: During synchronous data mode operation, the DCD output behaves as
if it were in normal mode regardless of the &C option setting.
DCD Drop Time S10
This command controls the amount of time which the Data Carrier Detect
(DCD) signal is turned off after a disconnect. This command applies only if the
&C2 command is in effect.
Data Terminal Ready &D
This command controls interpretation of Data Terminal Ready (DTR) input.
&D1, &D2, and &D9 are valid only when the TA is in asynchronous mode.
NOTE: In synchronous mode, the DTR pin has other functions ( page 65 ).
Ignore (default) - Use the &D command to allow the 500 TA to ignore the DTR
signal. This option is valid for both asynchronous and synchronous modes.
DTR Drop to Command Mode - Use the &D1 command to specify that if the
500 TA is online and detects a high-to-low transition of DTR, the 500 TA will
exit the data mode and enter the AT command mode. If the 500 TA is off-line
DTR will have no effect; the 500 TA can connect and enter the data mode with-
out DTR on.
DTR Drop Hangs Up - Use the &D2 command to specify that if the 500 TA is
off-line, it will not connect (dial or answer) if DTR is low. If the 500 TA is
online and a high-to-low transition of DTR is detected, the 500 TA will hang
up, return to the command mode, and disable auto answer.
DTR Drop Resets - Use the &D3 command to reinitialize the data port when
the 500 TA detects an on-to-off transition of DTR. If it is online it will hang up,
reset the active configuration to the stored configuration based on the Powerup
Stored Profile (&Y) option. The 500 TA will not automatically answer while
Command Operation
&C DCD always on (default)
&C1 DCD goes on when the 500 TA establishes a connection
&C2 DCD always on except during S10 disconnect
Command Operation
S10= Range: 0-255 default (14) Units = 1/10 seconds