Aastra MBU 400, Administrator'S Manual, Page: 64 / 74

64 Aastra MBU 400 Administrator Guide
Troubleshooting
Troubleshooting
The 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 problems 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 Solution
The handset keeps repeating the
checking step of the handset
update.
When you launch the upgrade
process the first time, the handset
update may loop.
First ensure that the handset update has
been completed (to 100%) at least once.
Then reset the MBU 400 by pressing the
RESET button on the side of the base
unit.
The handset display is black. Handset is in power saving mode. Press any key.
Batteries are drained. Charge the batteries.
Power is not turned on. Check that the batteries are inserted with
the plus and minus ends facing the
correct way. Press and hold the red key
.
The handset does not charge. The charger is not powered. Check that the power cord is connected
properly to the charger, and that power is
turned on.
Batteries are not inserted
correctly.
Check that the batteries are inserted with
the plus and minus ends facing the
correct way.
The handset registration failed,
and the status indicator on the
display is black.
Handset is out of range of the MBU. Move the handset closer to the MBU,
place it in the charger, and reset the
MBU.
The display reads, "Searching for
Gateway" or "Registering to
Gateway" without registering
successfully.
Handset is out of range of the MBU. Move the handset closer to the MBU.
MBU is not powered. Plug MBU into a power outlet. (If
possible, a continuous power outlet.)
Access codes don’t match. Change the handset access code to
match the gateway access code. (If you
don’t know the gateway access code, it
can be reset by your System
Administrator.) Once the access codes
match, reset the gateway to initiate
handset registration mode.
NOTE: A factory default reset will set the
gateway access code to 0000, but will
not change the handset access code.
The POWER indicator on the MBU
is not lit.
MBU is not powered. Check that the MBU power cord is
connected properly, and that the adapter
is plugged into a power outlet. (If
possible, a continuous power outlet.)
CLR CLR