NEMA ratings for enclosures • NEMA ratings for enclosures • The National Electrical Manufacturers’ Association (NEMA) issues guidelines and ratings for an enclosure’s level of protection against contaminants that might come in contact with its...

Pinning for V.35 to RS-232 Gender Changers. • FA056 • PIN-OUT • P1 • —— • P2 • A • —— • 1 • B • —— • 13 • C • —— • 5 • D • —— • 7 • E • —— • 9 • F • —— • 10 • P • —— • 2 • R • —— • 4 • S • —— • 15 • T • —— • 17 • U • —— • 11 • V • —— • 6 • W •...

Introduction to SCSI technology. • Introduction to SCSI technology • SCSI (Small Computer Standard Interface), pronouced "scuzzy", enable you to connect your computer to wide range of peripherals such as hard disks, CD-ROMS, printers and scann...

Coax connectors. • Coax Connectors • The • Bayonet-Neill-Concelman (BNC) • connector, the most common connector, is widely used in video and radio frequency (RF) applications to 2.4 GHz, 10BASE2 Ethernet networks, cable interconnections, netwo...

Surge vs. lightning protection. • Surge vs. lightning protection • A brief rise in voltage • A surge is a brief rise in voltage that's caused when power is switched on or off to a high-powered device. Surges can produce high-transient voltages...

PAM-Modes • G.SHDSL devices use two parameters for line configuration: PAM and BASE RATE. While  G.SHDSL Economy and Etherlink II modems only know two PAM modes (16 and 32), Etherlink IV  works with PAM modes from 4 to 128. Although the PAM mo...

USB Standards • USB standards • The Universal Serial Bus (USB) hardware (plug-and-play) standard makes connecting peripherals to your computer easy. • USB 1.1 • USB 1.1, introduced in 1995, is the original USB standard. It has two data rates: ...

How to select a cabinet • How to select a cabinet. • Consider your requirements one at a time. • The sheer number of available options and variations can make choosing a data or server cabinet a daunting task. But, by considering your requirem...

IP Ratings (Ingress Protection) • IP Ratings (Ingress Protection) • Ethernet technology is coming to the factory floor. Once limited to networks in office environments, Ethernet has also proven to be a robust alternative to the RS-232 interfac...