Canton 3C16476CS manual 10/100/1000BASE-T/SFP Ports, Link/Activity LEDs, StatusMeaning

10CHAPTER 1: INTRODUCING THE BASELINE SWITCH

(half-duplex or full-duplex) are automatically determined by the capabilities of the connected device.

Each port also supports automatic MDI/MDI-X detection and can be connected to either a 10BASE-T, or a 100BASE-TX device.

CAUTION: The Switch supports full-duplex autonegotiation. If the connected device does not support autonegotiation, the Switch will operate in half-duplex mode (even if the attached device is operating in full-duplex mode).

In such a configuration, you may notice some degradation of network performance. 3Com recommends that you use devices that are capable of autonegotiation (and that you ensure that autonegotiation is enabled, if it is a configurable option). (see “Troubleshooting” on page 59).

(2) 10/100/1000BASE-T/SFP Ports

Ports 49 and 50 are combination Gigabit RJ-45 ports with shared Small Form Factor Pluggable (SFP) trans- ceiver slots. If an SFP transceiver (purchased sepa- rately) is installed in a slot and is active, the associated RJ-45 port of the same number is disabled.

The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you can use straight-through or crossover cables for all network connections to workstations or servers, or to other switches or hubs.

The two SFP ports support fiber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high-capacity aggregated link backbone connection.

SFP ports are numbered 49 and 50 on the Switch. When an SFP port is active, it has priority over the 10/100/1000 port of the same number. The corresponding 10/100/1000 port is disabled when an SFP transceiver is plugged in.

(3) Link/Activity LEDs

The following tables describe the LEDs visible on the front of the Switch, and how to read their status according to color.

Table 4 10BASE-T/100BASE-TX Ports

StatusMeaning

Green	Link established, operating at 100 Mbps
Yellow	Link established, operating at 10 Mbps
Flashing Green	Packets are being received or
	transmitted on the port at 100 Mbps