GarrettCom Quad User Manual
Page 27
Magnum Quad-Series Fiber Switches
Installation and User Guide (06/09)
20
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3.4 RJ-45 ports, internal jumper settings for 10/100Mb (auto-
negotiation) or for fixed Half- or Full-Duplex @ 100Mb, per port
The factory (or default) setting is for auto-negotiation on all RJ-45 ports, which is
generally popular. It works well under most circumstances, but cannot always be
Figure 3.4. RJ-45 ports, internal jumper settings. Note: Be certain that the main
power is disconnected before opening the unit or changing any internal jumper settings.
depended upon to work as expected. If auto-negotiation will not function properly in
your setup, internal jumpers allow the speed and mode of the Q-Series RJ-45 (copper)
quad-ports to be fixed, even if the attached device may or may not support auto-
negotiation. This is desirable when there are unknown devices presently or potentially
connected, which will not operate correctly with auto-negotiation. Examples include
some NICs and most Media Converters.
Therefore, the default setting of auto-negotiation (copper ports) is generally
desirable because it is widely used and allows for the connection of various devices
without re-configuration. Under certain conditions,(where the connected device is full
duplex and does not support Auto-negotiation; or the connected device does not support
Auto-negotiation properly) no auto-negotiation is better and the internal jumper settings
will permit this to be selected on a per-port basis.
1
AUTO
10/100 Mbps
Auto Negotiation
100 Mb
J4
Bottom QPM Retaining
Jumper Settings for HDX/FDX
and Auto Negotiation
Two(50) Pin
QPM Connectors
(inserts into main board
)
Printed Circuit card
FRONT
TOP
LED
Uplink
Switch
100 Mb
10/100 Mb
Factory Settings
100Mbps Full
Duplex
100Mbps Half
Duplex
Jumper Settings for Auto-Negotiation, or for 100MB Half or Full Duplex
Jumper
Port
Function
Factory Settings
Speed
JP1-2, 6-7, 9-10
Pin 2-3,6-7,10-11
FDX @100 config
100 Mb
JP2-3,6-7, 10-11
Pin 1-2, 6-7, 9-10
HDX@100 config
NO
10/100 Mb,
NO
JP1-2, 7-8, 11-12
Pin 1-2, 7-8, 11-12
Auto-Negotiation
YES
100 Mb
J1
5 6 7 8
9 10 11 12
J1
1 2
3
J1
1 2
3
J1
4
4
1 2 3 4
1 2 3 4
J1 J2 J3