D-Link DES-815 User Manual - Setting The Duplex Mode

20

Installation

(i.e., cables in which the twisted-pair outputs have been crossed).

See Appendix B for more information on crossover cable pinouts.

The table below describes when to use which cable type.

Table 2-1: Using Straight-Through and Crossover Cables

SWITCH

PORT USED

DEVICE

PORT

TYPE

CABLE TO USE

Normal

Server (or PC)

Straight-Through (||)

Switch

or Hub

Non-

Uplink

Crossover (X)

Uplink Straight-Through (||)

Uplink

Server (or PC)

Crossover (X)

Switch

or Hub

Non-

Uplink

Straight-Through (||)

Uplink Crossover (X)

Setting the Duplex Mode

Each port of the device can be set for half-duplex or full-duplex

operation.  The two 10/100Mbps ports and the MII connector can

be set to either full-duplex or auto-detect duplex mode.  At half-

duplex operation, packet transmission and reception do not occur

simultaneously, thus communication speed is limited to 100Mbps

using 100BASE-TX mode and 10Mbps using 10BASE-T mode. At

full-duplex operation, packet transmission and reception occur

simultaneously, thus communication speed is doubled to 200Mbps

using 100BASE-TX mode and 20Mbps using 10BASE-T mode.

Full-duplex operation can be used on links between the 10/100