COURIER HIGH SPEED MODEMS
doesn't
work,
try
a fixed
link
rate
of
&N6 (9600
bps)
or
&N3
(2400 bps).
HST
modems:
We
do
not
recommend
synchronous
communica-
tions for these
modems
because
of
their
asymmetrical
modulation,
unless
you
are
connecting
with
another
USRobotics
HST
modem.
In
that
instance, set
both
modems
to Bl.
For
high
speed
connections
with
another
HST
modem,
set
both
modems
to a fixed link rate, &N6 (9600 bps), &NS (14.4K bps),
or
&N9 (16.SK bps). Find
out
first,
however,
if the
Mainframe
accepts link rates
over
9600 bps. For 2400-bps connections
and
lower, set
both
modems
to a variable
link
rate,
&NO.
Dual Standard
modems:
Set
the
Dual
Standard
modem
to
BO.
Try
a variable link rate setting
(&NO)
first.
If
that
doesn't
work,
you
may
have
to
set
a fixed link rate, for example, &N6 (9600 bps).
Flow Control
Only
the following
Courier
settings
are
allowed:
&HO
or
&Hl,
&IO,
&RO
or
&Rl. See
Chapter
4 for
more
information
on
flow
control settings.
Transmit Clock Source (&Xn)
This setting specifies
whether
the
Courier
or
your
DTE generates
the
Transmit
clock timing signals for a
synchronous
call.
Most
-
-
-
-
-
-
-
-
-
-
users
will
require
the
default
setting,
&XO.
-
&XO
The
Courier
is
the
source
of
the
Transmit
clock
timing
signals
and
sends
them
to
your
DTE
over
the
RS-232
interface. Default.
&Xl
The
DTE is the source of
the
Transmit
clock
timing
signals
and
sends
them
to
the
Courier
over
the
RS-232 interface.
This setting is
used
typically
in
leased line
multiplexed
operations. (Multiplexors
divide
the
phone
channel
so
that
the
channel
carries several calls
at
the
same
time.)
We
do
not
recommend
this setting for HST
modems.
&X2
The Courier's Receiver clock is the
source
of the
timing
signals. The signals
are
looped
to
the
Transmit
clock
and
sent
to
your
DTE
over
the
RS-232 interface. This setting is
only
used
in
those
systems
that
require
synchronization
of
7-4
Synchronous Operations
-
-
-
-
-
-
To Next Page
Loading...
