Magnum Quad-Series Fiber Switches
Installation and User Guide (06/09)
21
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See Section 4.4 for additional information on auto-negotiation functionality.
3.5
Fiber 100Mb ports, internal jumper settings for 100Mb fixed Half- or
Full-Duplex, per port
The factory (default) setting is for full-duplex on all fiber 100Mbps ports, which is
generally popular. FDX works well under most circumstances, but cannot always be
depended upon to work as expected. If full-duplex on 100Mbps will not function
properly in your setup, internal jumpers allow the mode of the Q-Series fiber
Figure 3.5.
Fiber ports, internal jumper settings.
Note: Be certain that the main power is disconnected before opening the unit or
changing any internal jumper setting
quad-ports to be fixed, even if the attached device may or may not support full-duplex.
This is desirable when there are unknown devices presently or potentially connected,
which will not operate correctly with full-duplex. Examples include hubs that support
only half-duplex by default.
Therefore, the default setting of full-duplex (fiber ports) is generally desirable
because it is widely used and allows for the connection of various devices without re-
2
3
1
4
1
100 Mb
J4
Bottom QPM Retaining
Jumper Settings for HDX/FDX
Two(50) Pin
QPM Connectors
(inserts into main board
)
Printed Circuit card
TOP
LED
100 Mb
Factory Settings
100Mbps Full
Duplex
100Mbps Half
Duplex
Jumper Settings for 10 or 100Mbps Fiber Half or Full Duplex
Jumper
Port
Function
Factory Settings
Speed
JP1-2, 6-7, 9-10
FDX @100 config
100 Mb
Pin 1-2, 6-7, 9-10
HDX@100config
NO
YES
JP1-2, 7-8, 11-12
Pin 1-2, 7-8, 11-12
100 Mb
J1
5 6 7 8
9 10 11 12
1 2
3
J1
1 2
3
J1
4
4
1 2 3 4
J1 J2 J3
