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12-2 Troubleshooting
NEC MH150/MH160 Mobile Handset Administration Guide - Revision 2
Transmission obstructions
Prior to system installation, the best location for APs for optimum
transmission coverage should have been determined. However, small
pockets of obstruction may still be present, or obstructions may be
introduced into the facility after system installation. This loss of service
can be restored by moving out of the obstructed area or by adding/
rearranging APs.
Configuration Problems
Certain problems are associated with improper configuration of either
the SIP system or the handset.
Configuration problems are generally corrected by changing the
configuration on the SIP system or on the handset. There may also be
incorrect programming of the AP. See the Configuration Guide for the AP
in use at the site.
Handset Status Messages
NEC MH150/MH160 Mobile Handset status messages provide
information about the communication between the handsets, AP, and
NEC PBX system.
Table 12-1 summarizes, in alphabetical order, the
status messages.
Table 12-1 Mobile Handset status messages
Message Description Action
3 chirps (audio)
Handset is not able to communicate with the best
AP, probably because that AP has no bandwidth
available.
None. This is only a warning, the call will hand off
to the best AP once it becomes available.
Address Mismatch
Handset software download files are incorrect or
corrupted.
Please contact NEC NTAC for support.
ASSERT xxx c
Line yyy
The handset has detected a fault from which it
cannot recover.
Record the error code so it can be reported.
Turn the handset off then on again.
If error persists, try registering a different handset
to this telephone port.
If error still persists, please contact NEC NTAC for
support.
Assoc Failed
xxxxxxxxxxxx
x…x = AP MAC address.
Handset association was refused by AP; displays
MAC of failing AP
Check handset and AP security settings.
Ensure AP is configured per Configuration Guide.
Try another AP.
Assoc Timeout
xxxxxxxxxxxx
x…x = AP MAC address.
Handset did not receive association response
from AP; displays MAC of failing AP.
Check handset and AP security settings.
Ensure AP is configured per Configuration Guide.
Try another AP.