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CHAPTER 6
DECmux II OPERATION
This chapter describes the DECmux II unit in normal operations. (For diagnos-
tic information, see Chapter 7, Section 7.2, TESTING DECmux II.)
The default settings of DECmux II parameters are suitable for many
installations.
The composite port line speed is the most likely parameter needing change; the
default is 9600.
It
should be set to the same speed as the modem (see Section
6.3.14, System Command, and 6.3.11, Save Command, for details).
6.1 CONTROLS AND INDICATORS
6.1.1 Indicators
The DECmux II unit has three indicators: one on the front bezel and two on
the rear connector panel. Their locations are shown in Figure 6-1.
6.1.1.1
Start-up Indicator -
The green LED start-up indicator, located on the
front bezel, is a three-state indicator. It indicates power supply OK, start-up
diagnostic running, and start-up
dia~~nostic
complete.
Following power-up, the LED will flash briefly, indicating that the power supply
is OK. The indicator will then turn off for several seconds, indicating that the
start-up diagnostic is being run. On successful completion of the start-up diag-
nostic, the indicator will turn on permanently, indicating that the DECmux II
unit is now operational.
CHAPTER 6 OECmux II OPERATION
1
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