3Com 2250-SFP Physical Features, Power-over-Ethernet Capability, Gigabit Combo Ports RJ-45/SFP

10INTRODUCING THE BASELINE SWITCH

10/100 Mbps ports can operate in either half-duplex or full-duplex mode.

Power-over-Ethernet Capability

The Switch 2426-PWR Plus (3CBLSF26PWR) provides 24 front panel RJ-45 ports that support the IEEE 802.3af Power-over-Ethernet (PoE) standard. Any 802.3af compliant device attached to a port can directly draw power from the Switch over the Ethernet cable without requiring its own separate power source. This capability gives network administrators centralized power control for devices such as IP phones and wireless access points, which translates into greater network availability.

The Switch also supports a pre-standard implementation of 802.3at, delivering up to 29.6 W per port (measured at the PD, assuming 100 m Cat 5E cable connected between the PD and the Switch 2426-PWR), subject to the maximum power budget available.

Gigabit Combo Ports (RJ-45/SFP)

The 2 Gigabit combo ports support fiber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This offers the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network.

When an SFP port is in operation, the corresponding 1000BASE-T port is disabled. The 1000 Mbps connections can only operate in full duplex mode.

Physical Features

Figures 1, 2, and 3 show the front and rear panels of the Switch. The numbers in these diagrams refer to numbered sections in “Front Panel” on page 11 and “Rear Panel” on page 15.

Figure 1 3CBLSF26 Front and Rear Panels

Figure 2 3CBLSF26PWR Front and Rear Panels