PoE Power over Ethernet • What is PoE? • The seemingly universal network connection, twisted-pair Ethernet cable, has another role to play, providing electrical power to low-wattage electrical devices. Power over Ethernet (PoE) was ratified by...

...takes 90.87 seconds for switches in non redundant networks to recover from power interruptions. • 45% of all data loss is caused by power problems. • More than 70% of servers are protected with a UPS • For a small fraction of the cost of your networ...

Power problems. • Power-problems • Sags • The Threat — A sag is a decline in the voltage level. Also known as “brownouts,“ sags are the most common power problem • The Cause — Sags can be caused locally by the start-up demands of electrical de...

SFP compatibility • SFP compatibility • Standards for SFP fiber optic media are published in the SFP Multi-Source Agreement, which specifies size, connectors, and signaling for SFPs, with the idea that all SFPs are compatible with devices that...

...install a card, set DIP switches, and make IRQ settings. Now you can connect digital joysticks, scanners, speakers, cameras, or PC telephones in seconds. Instead of opening up your CPU to insert new boards, you make all the connections outside the c...

...IDs, jumpers, DIP switches, screws, latches, or terminators. • There are two types of FireWire connectors: 6-pin and 4-pin. The 6-pin connector, usually found on computers, provides two pairs of wires for signals and one pair of wires to provi...

...must for your servers, switches, routers, and other network equipment plus the climate control equipment at your main data center. Even though you may be local, when problems occur in the middle of the night, headquarters can seem very far away. • ...

...10-/100-Mbps Ethernet switches or for connection to high-speed servers with the assurance of total compatibility with your Ethernet network. • When Gigabit Ethernet first appeared, fiber was crucial to running Gigabit Ethernet effectively. Since t...