
Appendix
A
Troubleshooting Guide
This appendix will help diagnose and solve any issues with NS40 installation and operation.
Solution
Possible Causes
Problem
Configuration and power to the cell will need to be revised. Please
consult your MST System Engineer to assist. A site survey is
Insufficient power supplied
to the NS40.
The status light on
the NS40 is not
blinking when
powered up.
conducted to determine power requirements for a system design
or modifications.
Reboot the device in the web browser interface under
System
>
Reboot
.
NS40 needs to the rebooted.
The NS40 has no power.
LEDs on the
wireless network
switch are not on.
•
Check that power is connected from either the composite cable,
DC power cable to the NS40 in the cell.
•
Verify the network switch is connected to an operational power
supply.
•
Check the power supply is operating as manufacturer's
instructions.
Verify the composite fibre port link is connected and active.
The NS40 fibre connector
is not connected.
The composite
fibre port activity
light is not on.
There is a network access
issue.
The wireless
network cannot be
configured from
•
Check that the NS40 is properly installed, all cable connections
are connected properly and the unit is powered on.
•
Check that the VLAN settings on the devices upstream on the
network are not restricting access.
the web browser
interface.
Check antennas are insulated from ground.
Incorrect earthing scheme.
Power supply
instability.
Using the web browser interface under
Network
>
Wireless MAC
VLAN Bridge
, check the MAC address of the device is configured
and assigned to the correct VLAN.
Incorrect Wireless MAC
VLAN Bridge settings.
Client devices
cannot connect to
the wireless
network.
Using the web browser interface under
Network
>
Wireless
Interface
, check the device's MAC address is not denied in the
MAC filter settings.
MAC filter settings.
Check the connectors and fibre ports are clean. Clean using alcohol
wipes or fibre optic cleaning kits. NB: Do not use air spray as the
Composite connector or
fibre port is dirty.
Signal loss in the
fibre optic cable.
compressor oil can leave residue. Refer to Appendix A for fibre
optic cable testing.
Check antennas are free from obstructions and positioned for
optimum transmission. See
on page
26 .
Antennas not positioned
correctly.
Poor wireless
coverage or loss
of data frames.
NS40 I.S. Wireless Network Switch
75
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