3Com 3CNJ2000 Data Sheet - Page 3

3COM® INTELLIJACK® GIGABIT SWITCH FAMILY FEATURE HIGHLIGHTS AND MODEL COMPARISON Feature Quadruples LAN connections by providing four 10/100/1000 switched Ethernet ports Provides two RJ-45 pass-through ports for legacy communications support Designed for in-the-wall operation to accommodate virtually any location, reducing installation costs and potential disruption of services Adds flexibility to existing cabling plants Optimizes converged applications with network traffic prioritization Multiple power options Provides PoE to power devices such as IP phones, cameras and access points Simple Web-based management Supports IEEE 802.1X network authentication Supports IEEE 802.1Q VLAN for improved security and segmentation Supports IEEE 802.1ad for link aggregation Cable diagnostics for fault finding Works with standards-based SNMP network management applications, including 3Com Network Supervisor IntelliJack Model NJ2000 NJ1000                     UNDERSTANDING THE POWER OPTIONS Power to the IntelliJack Gigabit Switch can be supplied through either PoE (IEEE 802.3at or 802.3af) applied to the uplink port or through the optional local external power supply. If power is supplied to the uplink port by 802.3at or by the external power supply, then ports 1 and 2 may act as PoE Power Source Equipment (PSE) and may also provide power to other devices plugged into those ports. If power is supplied by 802.3af, then ports 1 and 2 will not be able to supply PoE power. Refer to the below table for a summary. Input Power IEEE 802.3at Local external power IEEE 802.3af PoE Forwarding, Ports 1 and 2 Yes Yes No Power options and PoE Forwarding 3