3.5 Operating Mode
Four TP ports are designed as auto-negotiation capable switched ports. Each port can determine the speed and duplex type used automatically through an auto-negotiation process with the remote connected auto-ne- gotiation device. The auto-negotiation process is performed when the con- nection is made. When connecting to a non-auto-negotiation device, each TP port also features the capability to auto-sense the connection speed.
The following table lists the operation mode used for the switched port when it connects to different devices. The operating mode includes the connection speed and duplex type.
Connected Device 10BASE-T hub 100BASE-TX hub Auto-negotiation device Non-auto*1half-duplex device Non-autofull-duplex device
Operation Mode Used 10Mbps, half-duplex 100Mbps, half-duplexAuto-negotiation *2 auto-speed-sensing *3, half-duplex Not supported
*1 Non-auto : non-auto-negotiation
*2 determined through auto-negotiation process
*3 speed is determined by auto-sensing function
Most of 10BASE-T hubs and 100BASE-TX hubs are non-auto-negotia- tion devices and operate on half-duplex mode.
The operating mode of the fiber port is determined by the setting of duplex mode selector located on rear panel. The following table lists the maximum MM fiber cable length connecting to different devices:
Connected Device | Duplex Mode | Distance(MM cable) |
Network card | Half-duplex | 400 m |
Network card | Full-duplex | 2 Km |
Class I hub | Half-duplex | 160 m |
2 Class II hubs | Half-duplex | 112 m |
Switched fiber port | Half-duplex | 400 m |
Switched fiber port | Full-duplex | 2 Km |
