DLM4100 User’s Manual
P/N 161-09977-001B
6
&Dn- DTR
– AT&Dn determines how the modem will respond to changes to DTR
n=0 DTR is ignored by the modem
n=1 Enter command mode if DTR revoked
n=2 Disconnect if DTR revoked
n=3 Soft reset when DTR revoked
&Gn- Guard Tone
– AT&Gn controls the guard tone produced by the modem
n=0 Guard tone disabled
n=1 Guard tone disabled
n=2 1800 Hz guard tone
&Kn- Flow Control
– AT&Kn selects the flow control method used by the modem
n=0
Disabled
n=3
RTS/CTS
n=4
XON/XOFF
n=5 Transparent XON/XOFF
n=6 RTS/CTS and XON/XOFF
&Pn- Dial Pulse Make/break Ratio
– AT&Pn determines the specific pulse dialing parameters used by the
modem
n=0 39/61% @ 10pps
n=1 33/67% @ 10pps
n=2 39/61% @ 20pps
n=3 33/67% @ 20pps
&Qn- Line Connection
– AT&Qn determines if error control or data buffering are active on the link
n=0 Direct mode (no data buffering)
n=5 Use Error Correction
n=6 Normal Mode (speed buffering)
&Sn- DSR Operation
– AT&Sn sets the operation of the DSR signal
n=0 DSR always active
n=1 DSR in accordance with V.25
&Tn- Test Modes
– AT&Tn selects modem test modes
n=0 Exit test mode
n=1 Local analog loopback
n=3 Initiate local digital loopback
n=4 Respond to remote loop request
n=5 Deny remote loop request
n=6 Initiate a remote digital loopback
n=7 Remote digital loopback with self-test
n=8 Local analog loopback with self-test
