Chapter 7: AT Commands and Registers
7-10 CSMIM-T1 Hardware Installation Guide
U (Dial in Direct Mode) Placed anywhere in the dial string, causes
the modem to override current operating mode and dial in direct
mode for the current connection only.
V (Dial in LAPM Mode with Fallback to MNP) Placed anywhere
in the dial string, causes the modem to override current operating
mode and dial in LAPM reliable mode with fallback to MNP for
the current connection only.
X (Dial in Auto-Reliable Mode) Placed anywhere in the dial string,
causes the modem to override current operating mode and dial in
auto-reliable mode for the current connection only.
Y (Dial in MNP Reliable Mode) Placed anywhere in the dial string,
causes the modem to override current operating mode and dial in
MNP reliable mode for the current connection only.
Z (Dial in Normal Mode)
Placed anywhere in the dial string, causes the modem to override
the current operating mode and dial in normal mode for the
current connection only.
DL Redial the Last Telephone Number Dialed
Redials the last telephone number that the modem dialed.
%D
n
Disconnect Buffer Delay
Where n is an integer from 0 to 255 representing seconds (Default
is 0).
Sets a delay during which the modem attempts to process data in
its transmit or receive buffer before disconnecting. When your
software lowers DTR or you type ATH <Enter> the modem
attempts for n seconds to empty its transmit buffer before
disconnecting. When carrier drops, it attempts for n seconds to
empty its receive buffer before disconnecting. If its buffers are
empty or if n=0, it disconnects without delay.
If a physical disconnect occurs (for example, the connection drops
from too many retransmissions in reliable mode), the modem can
process only the receive buffer. If the delay expires before the
modem empties its buffers or it is in command state at disconnect,
it may lose data.