GarrettCom Quad manual Jumper Settings for HDX/FDX

Magnum Quad-Series Fiber Switches Installation and User Guide (06/03)

3.4RJ-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

Jumper Settings for Auto-Negotiation, or for 100MB Half or Full Duplex

Jumper	Port		Function	Factory Settings		Speed
JP2-3,6-7, 10-11	Pin 2-3,6-7,10-11		Auto-Negotiation		YES	10/100 Mb,
JP1-2, 6-7, 9-10	Pin 1-2, 6-7, 9-10		FDX @100 config		NO	100 Mb
JP1-2, 7-8, 11-12	Pin 1-2, 7-8, 11-12		HDX@100 config		NO	100 Mb
Factory Settings 10/100 Mbps			100Mbps Full		100Mbps Half
		1
Auto Negotiation			Duplex			Duplex
			J1		J1
	J1

10/100 M

1 2 3 4

AUTO

1 2 3 4

100 Mb

100 Mb

1 2 3 4

J1

9	10	11 12
5	6	7	8
1	2	3	4		Jumper Settings for HDX/FDX
					and Auto Negotiation
			J1	J2	J3	J4	Bottom QPM Retaining
Printed Circuit card							Two(50) Pin
							QPM Connectors
			TOP				(inserts into main board)

Uplink

Switch

FRONT

LED

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.

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