Energy-Efficient Ethernet • Energy-Efficient Ethernet • The IEEE 802.3az Ethernet standard, ratified in 2010, provides a standardized way for some Ethernet devices to reduce power consumption. Energy-Efficient Ethernet devices have a low-power...

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...

HDCP • HDCP • HDCP (High Bandwidth Digital Protection) is an encryption system for digital video, which was developed in 2003 by Intel. It applies to all content on Blu-ray Discs and HD DVDs, and allows the best possible resolution for display...

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...

USB (Universal Serial Bus) • USB (Universal Serial Bus) • Universal Serial Bus (USB) is a royalty-free bus specification developed by leading manufacturers in the PC and telephony industries to support plug-and-play peripheral connections. USB...

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...

Why you should consider a UPS. • Why you should consider a UPS • What it is • An uninterruptible power supply (UPS), also known as an uninterruptible power source or a battery backup, is a device that maintains a continuous supply of electric ...