Wi-LAN Hopper Plus 120-24 Installation And Configuration Manual page 117

Indication
Poor link
performance
SNMP can't be
activated
New configuration
will not take
Unable to access
main configuration
menu
DEC 2000 Rev 02
Possible Cause
Antenna or cable failure or
damage
Polling sequence
Distance
No LOS
Excessive Bit errors and
processing errors
Signal absorption
Throttling level
Center frequency
Overpowering co-located
unit
IP filtering configured
incorrectly for SNMP
Incorrectly upgraded
software
Invalid passwords
Suggested Corrective Actions
IP address/subnet mask–Incorrectly configured
IP addresses will result in units being unable to
communicate
Check that IP addresses are unique for each unit
within a subnet and the correct subnet mask is
being used
Visually inspect antenna and cables for damage
Sweep antenna and cables
Replace antenna or cables
Check polling round number. Higher polling
round number increase the delay between polls
for less active units
Check the maximum remote distance
configuration setting
Check LOS between antennas
Multipath interference–align or relocate
antennas or radio
Check LOS for obstacles such as trees
Check if throttling is correctly configured
(Control throttling by enabling or disabling
throttling and by modifying the throttling index)
Set units from different systems in the same
geographic area to different center frequencies–
overlapping wavelengths from other systems will
degrade performance
Output power from one unit can overpower
another co-located radio, even if units operate
on different channels—lower unit power
Change IP filtering to enable SNMP
Reload the software image using ftp or install
new EPROMs
Contact Wi-LAN for information about how to
re-enter your system
Units will need to be reset
Troubleshooting Areas
105