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News

Security Link Over Coax Bridges the IP Surveillance Gap

Intersil : 05 October, 2010  (New Product)
Intersil is at Security Essen this week demonstrating the company's ability to supply products enabling the transmission of analogue and digital IP video over coax cabling in hybrid surveillance networks
Security Link Over Coax Bridges the IP Surveillance Gap
Intersil has introduced an advanced modem solution designed to simultaneously transmit analogue CVBS video and digital IP Video over a single coaxial cable. The Intersil Techwell SLOC (Security Link over Coax) solution uniquely allows modern mega-pixel IP cameras to operate in the existing CCTV coaxial cable infrastructure without the need for new wiring or cable modifications, providing significant cost and resource savings.

Moreover, the Intersil Techwell device enables digital IP camera functionality on existing coaxial wiring infrastructure without disrupting existing CCTV services. In addition, the embedded analogue CVBS video enables latency-free live viewing and controlling of digital IP cameras. Surveillance system manufacturers can now architect an effective hybrid surveillance system that supports latency-free analogue CCTV functions as well as networked IP Surveillance functions.

The solution is comprised of the TW3801, a SLOC-based camera modem PHY device, and the TW3811, a SLOC-based receiver modem PHY device. Based upon Intersil Techwell technology, the combination of TW3801 and TW3811 provides the security surveillance industry with a seamless migration from a traditional analogue system to an IP security system. The SLOC technology leverages the installed coaxial cable infrastructure and enables networked IP functions without requiring significant change to either the IP camera design or the DVR (digital video recorder) design.

Both the TW3801 and the TW3811 are highly integrated modem PHY subsystems that include an analogue front end (AFE), a digital modem and two Ethernet media independent interfaces (MII). The TW3801 accepts an analogue CVBS signal and an Ethernet MII signal and internally combines these signals into one proprietary output signal for transmission over a coaxial cable. The TW3811 accepts a SLOC output signal from a SLOC-based camera modem PHY IC and decodes it into an analogue CVBS and an Ethernet MII signal. The result provides customers with the ability to upgrade their existing analogue-based system to the highly feature rich IP security system, including latency-free functionality.

The Intersil SLOC solution provides high-performance and robust communications between the IP camera and the receiver at coaxial cable lengths of up to 500 meters. Downlink throughput is up to 36Mbps (from camera to receiver); uplink throughput is up to 11Mbps (from receiver to camera).

Intersil Techwell will provide a demonstration of its SLOC modem PHY IC devices at the Security Essen 2010 show, which will be held in Essen, Germany from October 5th to 8th in Hall GA Booth155. Attendees will experience first-hand the simultaneous transmission of analogue CVBS video and digital HD 1080p IP Video over a single commodity-priced coaxial cable, streaming from an HD 1080p IP camera to a monitoring station.
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