MBU 400 Installation Guide 29
Troubleshooting
T
he following is a list of solutions to the most common issues that you
may experience when you install and use the MBU 400. Most of the prob-
lems you can easily solve yourself, whereas others require that you contact
your service provider. To view the most recently updated troubleshooting
information, go to www.aastratelecom.com.
Issue
Causes
Solutions
The handset
display is black.
The handset
does not charge.
The handset
registration
failed, and the
status indicator
on the display is
black.
The display
reads,
“Searching for
Gateway”.
1)
Handset is in
power saving
mode.
2)
Batteries are
drained.
3)
Power is not turned
on.
1)
The charger is not
powered.
2)
Batteries are not
inserted
correctly.
1)
Handset is out of
range of the MBU.
1)
Handset is out of
range of the MBU.
2)
MBU is not
powered.
1)
Press any key.
2)
Charge the batteries.
3)
Check that the batteries
are inserted with the
plus and minus ends
facing the correct way.
Press and hold the
Red
key.
1)
Check that the power
cord is connected
properly to the charger,
and that power is turned
on.
2)
Check that the batteries
are inserted with the
plus and minus ends
facing the correct way.
1)
Move the handset closer
to the MBU, place it in
the charger, and reset
the MBU.
1)
Move the handset closer
to the MBU.
2)
Plug MBU into a power
outlet. (If possible,
a continuous power
outlet.)
Troubleshooting
