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 | | | | | |
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
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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100 Mb