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24 and 16 Port Smart Switch II – User Manual Page 25
Trouble Shooting
Power
1. Verify that the AC power is present and that the external fusing is
correct and compliant with national requirements. The green
Power LED should be lit to indicate that the switch is powered.
Data Problems
1. Ensure that the Ethernet partner device (switch, router, NIC etc)
connected to the RJ-45 port of the switch is set for
auto-negotiation. If this Ethernet partner device does not support
auto-negotiation, then the switch can be programmed to apply
the required speed and duplex modes to match the legacy
partner equipment.
2. If the switch and the partner device cannot auto-negotiate then
the units automatically revert to the lower level of half-duplex
operation. This issue is common to all auto-negotiating Ethernet
devices and symptoms of incorrect negotiation include data
errors and fragmented packets.
3. Auto-negotiation can take up to 30 seconds to complete,
depending on the partner device.
4. Ensure that the switch is not overheating due to obstructed
airflow around the side vents.
Optional Fibre Uplink Module
1. Select the proper fibre cable for your network. The multi-mode
module must use multi-mode fibre cable and the single-mode
module must use single-mode fibre cable. See page 5 for the
supported cable types and installation settings.
2. Ensure that the optical loss budget of the fibre uplink is within the
limits specified on page27. Note that optical patch cables and
other joints and splices can introduce additional optical losses
that reduce the working distance of the fibre link.
Product Number 0-1591093-x 0-1591047-x Issue 1
© Tyco Electronics 2005