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COURIER HIGH SPEED MODEMS
&Bn
Data
Rate,
terminal-to-modem
(DTE/DCE).
&Cn
&BO
DTE/DCE
rate
switches to follow
connection
rate
(Default).
&Bl
DTE/DCE
rate
remains
fixed
at
the
DTE setting.
Allowable rates
are
38.4K, 19.2K, 9600, 4800, 2400, 1200,
300 bps.
&B2
Shift to
the
user-defined
fixed,
higher
DTE
rate
for
ARQ
calls, follow
the
connection
rate
for
non-ARQ
calls.
Answer
mode
only.
Carrier
Detect (CD) signal, modem-to-DTE. DIP
switch
6 is
factory set so
that
the
modem
controls
CD
and
the
override
is
disabled.
&CO
CD
override
(CD
always
ON).
&Cl
Modem
sends
CD
signal
when
it connects
with
another
modem,
drops
CD
on
disconnect.
&Dn
Data
Terminal
Ready
(DTR) signal, DTE-to-modem. DIP
switch
1 is factory set OFF for
normal
DTR
operations
and
the
override
is disabled.
&DO
DTR
override
(DTR
always
ON).
&Dl
If
you
issue this
command
before
connecting
with
another
modem,
you
can
enter
online
command
mode
during
a
call
by
toggling DTR. (Most
communications
software
packages
have
a
method
for toggling DTR.)
&Dl
functions similarly to
the
escape
code(+++),
except
that
&Dl
will
always
maintain
the
connection
and
put
the
modem
in
online
command
mode,
regardless
of
the
setting
of
DIP
switch
9.
If
DIP Switch 1 is
ON
(DTR override)
when
you
issue
the
&Dl
command,
DTR
override
is
automatically
turned
off.
However,
if
you
change
the
setting
of DIP
switch
1
after
issuing
&Dl,
the
DIP
switch
setting
takes precedence.
Return
online
with
the
0
command,
or
hang
up
with
the
Hcommand.
&02
Terminal
must
send
DTR for
modem
to accept
commands.
Dropping
DTR
terminates
a call.
Command Summary C-7
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