User guide

102
Chapter 5 - AT Commands
$Dn Persistent DTR Dialing
Values: n = 0, or 1
Default: $D0 (Disabled)
Enables or disables persistent DTR dialing (PDD). PDD causes the terminal adapter to
automatically and continually redial stored telephone number 0 when the port has no active
calls and DTR is high.
@P3=n Parity at Power-Up
Values: n = 0–4
Default: @P3=4 (None)
Use only to set the type of parity the TA uses when turned on. Once the TA receives an AT
command from the computer, it automatically adjusts to parity the computer is using.
@P3=0 Odd
@P3=1 Even
@P3=2 Mark
@P3=3 Space
@P3=4 None
@P4=n Data Bits
Values: n = 7 or 8
Default: @P4=8 (8 data bits)
Use only to set the number of data bits the TA uses when turned on. Once the TA receives an
AT command from the computer, it automatically adjusts to the number of data bits the
computer is using.
@P4=7 7 data bits
@P4=8 8 data bits
@P6=n Stop Bits
Values: n = 1 or 2
Default: @P6=1 (1 stop bit)
Use only to set the number of stop bits the TA uses when turned on. Once the TA receives an
AT command from the computer, it automatically adjusts to the number of stop bits the
computer is using.
@P6=1 1 stop bit
@P6=2 2 stop bits