3Com 3226 Getting Started - Page 25

SFP Operation 25 Table 7 Cables required to connect the Switch to other devices if auto-negotiation is disabled Cross-over Cable Switch to Switch (MDIX to MDIX) ✓ Switch to Hub ✓ (MDIX to MDIX) Switch to PC (NIC) ✕ (MDIX to MDI) Straight-through Cable ✕ ✕ ✓ CAUTION: If you want to install the Switch using a Category 5E or Category 6 cable, 3Com recommends that you briefly connect the cable to a grounded port before connecting network equipment. If you do not, the cable's Electrostatic Discharge (ESD) may damage the Switch's port. You can create a grounded port by connecting all wires at one end of a UTP cable to an earth ground point, and the other end to a female RJ-45 connector located, for example, on a Switch rack or patch panel. The RJ-45 connector is now a grounded port. SFP Operation The following section describes the use of SFP transceivers in your Switch. SFP transceivers are hot-insertable and hot-swappable. You can remove them from and insert them into any SFP port without having to power down the Switch. Approved SFP Transceivers The following list of approved SFP transceivers is correct at the time of publication. ■ 3CSFP91 SFP (SX) ■ 3CSFP92 SFP (LX) To access the latest list of approved SFP transceivers for the Switch on the 3Com Corporation World Wide Web site, enter this URL into your internet browser: http://www.3com.com Inserting an SFP To be recognized as valid, the SFP transceiver must have the following Transceiver characteristics: