Cable Technology Feature Article
Intersil Corp. Unveils Techwell Security Link Over Coax Solution
By Jayashree Adkoli, TMCnet Contributor
Intersil Corporation, a manufacturer of high-performance analog, mixed signal and power management semiconductors, unveiled a new Security Link over Coax “SLOC” solution, called Techwell (News - Alert).
Techwell is an advanced modem solution designed to simultaneously transmit analog Composite Video Baseband Signal “CVBS” video and digital IP video over a single coaxial cable. It allows digital IP cameras to operate in the existing CCTV coaxial cable infrastructure without the need for new wiring or cable modifications.
In other words, it enables digital IP camera functionality on existing coaxial wiring infrastructure without disturbing existing CCTV services.
The embedded analog CVBS video in the Intersil Techwell device enables latency-free live viewing and controlling of digital IP cameras. Due to these features, surveillance system manufacturers will be able to architect an effective hybrid surveillance system that not only supports latency-free analog CCTV functions but also networked IP surveillance functions.
The Intersil Techwell device encompasses the TW3801SLOC-based camera modem PHY device, and the TW3811 SLOC-based receiver modem PHY device. Both the TW3801 and the TW3811 are highly integrated modem PHY subsystems. These devices include an analog front-end “AFE,” a digital modem and two Ethernet media independent interfaces “MII.”
The TW3801 TW3801SLOC-based camera modem PHY device accepts an analog CVBS signal and an Ethernet MII signal. It internally combines these signals into one proprietary output signal for transmission over a coaxial cable.
The combination of TW3801 and TW3811 modem PHY devices provides a seamless migration from a traditional analog system to an IP security system for the security surveillance industry. Consequently, this new technology helps drive the transition from analog CCTV to networked IP surveillance.
In addition, the SLOC technology utilizes already installed coaxial cable infrastructure. It enables networked IP functions without requiring significant change to either the IP camera design or the DVR (digital video recorder) design. Ultimately, this provides significant savings in both cost as well as resources, said Intersil.
Furthermore, the SLOC solution provides high-performance and robust communications between the IP camera and the receiver at coaxial cable lengths of up to 500 meters. The downlink throughput is up to 36Mbps from camera to receiver and the uplink throughput is up to 11Mbps from receiver to camera.
Jayashree Adkoli is a contributing editor for TMCnet. To read more of Jayashree's articles, please visit her columnist page.
Edited by Tammy Wolf