Motorola 3460 Fast’R User Manual page 134

AT Command Set (continued)
Command Option
&D
0
1
2
3
4
5
6
7
The characters AT or at precede all commands except: +++, #####, and A/
Parameters and options shown shaded gray vary by country. For your country's options,
refer to the 3460 Fast'R Reference Guide (T0022).
Default (pre-set) options are underlined.
B-24
3460 Fast'R
Description
DTR Control
Determines how the modem interprets DTR signal.
=High. The modem ignores DTR from the computer; it
reads DTR as always asserted. Choose this option for
DTR/CTS flow control with error correction, or if the
computer does not provide DTR signal.
=Escape
=Disconnect
=Reset. The modem hangs up (if connected) and loads
the specified option set when an asserted-to-
deasserted DTR transition occurs. If DTR is deasserted,
the modem auto answers.
=Tail
=108.1. A deasserted-to-asserted DTR transition
instructs the modem to connect to the telephone line. If
the modem detects an incoming ring, it answers the call.
If the modem does not detect an incoming call, it dials
the number specified by the Default Dial option. An
asserted-to-de-asserted DTR transition disconnects the
modem from the telephone line.
When configuring the modem for V.25bis synchronous
direct-dial operation (DTR Control 108.1, AT&D5), the
ACU option must be set to No ACU (AT
=108.2. When the modem is disconnected from the
telephone line and the computer asserts DTR, the
modem responds to all AT commands. When the
computer de-asserts DTR, the modem does not respond
to dialing and answering AT commands, but responds to
all other AT commands. The DTR signal must remain
asserted throughout the connection. An asserted-to-de-
asserted DTR transition disconnects the modem from the
telephone line. If DTR is
de-asserted, the modem does not auto answer.
=Busyout
AC0).
*