GarrettCom Quad Manual De Usuario

Magnum Quad-Series Fiber Switches 

Installation and User Guide (06/03) 

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. 

J4

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

, 11-12

Auto-Negotiation

YES

100 Mb

JP1-2, 7-8, 11-12

Pin 1-2, 7-8

J1

J1

J1

4

4

  4

J1      J2       J3

1    2     3  

 

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. 

 

20 

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