Xon/Xoff
Flow
Control
and
Pacing,
you
will
F11-F12
end up with Xon/Xoff Pacing, and with CTS Flow Control plus
Pacing, data flow will
be controlled by the presence of the DTR
(pin 20) signal on the RS232 interface.
F11
turns on Inverted
DTR so that a high signal stops data flow and a low starts
data flow.
F12
turns off Inverted DTR so
that it acts normal
(high on and low off). If Flow Control is off, Pacing cannot be
turned on. If
Pacing is off, inverted DTR cannot be turned on.
Xoff/First
F13
is
a
special
pacing
command
that
is
called
X/off
First
Char.
Character
pacing.
Selecting
F1 3
causes
the
MultiMux
to
stop
data flow to the channel device upon receipt of a Xoff Character.
F13-F14
The next character from the channel device will start data (it does
not have to be an Xon
Character).
F14
will turn off this feature.
Identification
The
Identification
commands
identify
the
type
of
MultiMux.
This
Commands
information
is
valuable
when
communicating
with
Multi-Tech's
Technical Support personnel about your unit or its performance.
I0-2
The
l0
command
identifies the product. The
I1
command
indicates the Aggregate board firmware version. The
I2
command indicates the Voice/Fax firmware version.
List Channel
The List Channel Parameters command causes the MultiMux
Parameters
to display the condition of the parameters for each channel on the
systems
supervisory
console
as
shown
in
the
following
example.
L-L0
To
display
the
parameters
for
an
individual
channel,
say
channel
L1-L32
three, you would enter
ATL3
and hit your Return key. To display
the parameters for all of the channels, enter
ATL0
and then hit
your Return key.
Local Channel Parameters/ Node # 01
STP
FLOW
ENQ/
PASS PASS DEST DEST LINK
CHN SPD WD BIT PAR
CTRL
ACK ECHO PACE
EIA
XON CHN NODE A/B
01 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
01
02
A
02 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
02
02
A
03 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
03
02
A
04 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
04
02
A
05 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
05
02
A
06 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
06
02
A
07 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
07
02
A
08 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
08
02
A
09 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
09
02
A
10 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
10
02
A
11 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
11
02
A
12 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
12
02
A
13 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
13
02
A
14 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
14
02
A
15 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
15
02
A
16 19200 8
1 NONE
CTS
OFF OFF
OFF
OFF OFF
16
02
A
OK
Modem Link
This parameter specifies which link modem/DSU (link
A,
link
B
Used
or
D
ynamic) each
channel will use for data communications.Links should be load balanced so that heavy traffic channels are
MLA/B/D
not all using the same link. The
MLD
command selects dynamic
channel selection
which permits the MultiMux to pick the least
busy link per channel. When one channel is dynamic, all must be
dynamic. Works only in point-to-point networks and both muxes
must be set to
MLD
.
Parity
The
Parity
Select
commands
set
the
parity
of
MultiMux
opera-
Select
tions.
Under
normal
operations
(default
conditions)
parity
is
off
and
word
length
is
set
at
eight
bits.
Since
the
MultiMux
is
P0-2
intended to be transparent to channel device operation, this
combination will pass
parity information to the channel devices.The
P0
command turns parity off,
P1
sets odd parity and
P2
sets
it at even.
Response
The
Response
Time
Priority
command
determines
how
long
the
Time
mux will wait to send data from channel devices relative to each
Priority
other.
An
R0
setting
is
the
shortest
and
R3
the
longest.
The
Response
Time
Priority
commands
ensure
that
channel
R
operations which require heavy data transfers, such as program
transmissions or print
