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COURIER HIGH SPEED MODEMS
C-10 Alphabetical Command Summary
&Dn Data Terminal Ready (DTR) operations. At power-on and reset,
the modem operates according to the setting of DIP switch 1.
This command is not stored in nonvolatile memory as a power-
on/reset default.
&D0 DTR override. The modem operates as though the DTR
is always ON.
&D1 Advance usage: If issued before connecting with another
modem, the modem can enter online command mode
during a call by toggling DTR. &D1 functions similarly
to the escape code (+++), except that this setting is
independent of DIP switch 9.
If DIP switch 1 is ON (DTR override) when you issue the
&D1 command, the DTR override is automatically turned
off. However, if you change the setting of DIP switch 1
after issuing &D1, the DIP switch setting tales
precedence.
Return online with the On command, or hang up with the
Hn command.
&D2 Normal DTR operations. The terminal or computer must
send a DTR signal for the modem to accept commands.
Dropping DTR terminates a call.
&Fn The modem is shipped with four configurations (templates),
&F0−&F3, stored in permanent nonprogrammable memory
(ROM). Appendix B includes configuration listings for each
template. Any one of the templates may be loaded into current
memory (AT &Fn) or written to nonvolatile memory and reset
default (AT &Fn &W). Note, however, that &F0 is always
loaded into memory if DIP switch 10 is ON.
&F0 Load No Flow Control template settings
&F1 Load Hardware Flow Control template settings (Default)
&F2 Load Software Flow Control template settings
&F3 Load HST Cellular template settings