Owner`s manual

6–2 DEChub 900 MultiSwitch Owner’s Manual
Table 6–1: Problem Solving the DEChub 900 MultiSwitch (Cont.)
Symptom
Probable Cause Corrective Action
The Hub Manager
fails the self-test.
The self-test diagnos-
tics have uncovered a
hardware failure.
Power cycle the hub to see if the
diagnostic failure clears.
The Hub Manager or the backplane
is faulty. Contact your Digital service
representative to correct the
problem.
There is no
response on the
hub setup port.
The terminal device is
connected incorrectly.
Check that the correct cable and
adapter are used. If not, connect the
correct cable and/or adapter.
The port and the termi-
nal baud rates are not
compatible.
Change the terminal characteristics
to match the settings in Table 3–4.
The terminal flow con-
trol is disabled by
XOFF.
Use the terminal’s setup to clear
communications.
The setup port is redi-
rected, or in event dis-
play mode.
Press ( Ctrl/C ).
The modules do
not connect to the
backplane connec-
tor.
The pins on the module
connector might be
bent.
Gently straighten the pins.