3Com 3812 Getting Started Guide - Page 14
BASE-T/ 100BASE-TX/ 1000BASE-T Ports, Dual Personality SFP Ports, WARNING - switch manual
UPC - 662705470191
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14 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3812, SWITCH 3824, AND SWITCH 3848 Figure 3 Switch 3848 - front view WARNING: RJ-45 Ports. These are shielded RJ-45 data sockets. They cannot be used as standard traditional telephone sockets, or to connect the unit to a traditional PBX or public telephone network. Only connect RJ-45 data connectors, network telephony systems, or network telephones to these sockets. Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets. 10BASE-T/ 100BASE-TX/ 1000BASE-T Ports The 10BASE-T/100BASE-TX/1000BASE-T ports have RJ-45 connectors and are configured as Auto MDIX (cross-over). The default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes of a link are automatically detected to provide the highest available bandwidth with the link partner. Alternatively, auto-negotiation can be disabled. These ports can be manually configured to 10 Mbps half duplex, 100 Mbps half duplex, 10 Mbps full duplex or 100 Mbps full duplex. It is not possible to manually configure a 1000 Mbps link as auto-negotiation is mandatory in the 1000 Mbps standard. If auto-negotiation is disabled, Auto MDIX cannot function and the ports are fixed as MDIX (cross-over) mode. If auto-negotiation is disabled on a 1000 Mbps port, the speed will drop to the highest available speed. By default this is 100 Mbps. Dual Personality SFP The four Dual Personality SFP (Small Form Factor Pluggable) ports support Ports fiber Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul (LH70) transceivers in any combination. This offers you the flexibility of