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6.3.14 SYSTEM Command
The SYSTEM command allows the operator to set the parameters for the A
and B synchronous composite ports. Table 6-2 lists these parameters, their ini-
tial default values, and allowed options. The operator is prompted for each pa-
rameter. The current value is displayed. To leave a value unchanged, type
RETURN. To list valid alternatives to a prompt, type "?" followed by
<RETURN>.
Table 6·2 Composite Port Parameters
Parameter
Default
Options
Speed
9600 baud
1200,2400,4800,9600,19200,
(Note 1)
38400 baud
Modem Control
ENABLE
ENABLE, DISABLE
(Note 2)
Line Type
RS-232
RS-232, LONG LINE DRIVE
(Note 3)
The last parameter requested is the mode of the MUXserver 100. All units are
supplied default as SLAVEs. For all DECmux II units, ensU're that this param-
eter is set to SLAVE.
This command does not alter the operational parameters of the composite
ports. To modify the operational parameters, first execute the SYSTEM com-
mand, retain with the SAVE command, and then reinitialize the DECmux II
unit with the RESTART command.
Care should be exercised when altering composite link parameters
remotely by means of a CONNECT. On a normal nlodenl link, the
speed is deternlined by the external modem, but the DECmux II
port speed settings nlust match the modem speed exactly.
If
a link paran1eter is to be altered, first alter the remote port of the link with
a SYSTEM, SAVE, RESTART sequence; then alter the nearer port, and then
change the link or modem speed.
CHAPTER 6 OECmux II OPERATION
21
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