The Leader in Wireless and IP Video Systems

eNewsletter

Summer, 2008 Edition

In This Issue

Cover Story: New Product Release - LinkPower LPS1000 Adjustable Voltage Outdoor 5-Port PoE Switch

Technology Corner: A Look into License Free Radio Spectrum World Wide

Help Desk: Can a High Power AP with 1W Max Tx Power Cover 5 Mile Radius?

Cover Story: New Product Launch - LPS1000 Adjustable Voltage Outdoor PoE 5-Port Switch

Inscape Data Corporation, the leader in wireless and IP video systems announced the successful release of the LinkPower LPS1000 Adjustable Voltage Outdoor PoE Switch based on Inscape Data's patent-pending proprietary technologies specifically designed for outdoor LAN and video security markets.

Inscape Data's LinkPower LPS1000 Adjustable Voltage PoE Switch is a unique and powerful outdoor five-port Ethernet Switch with an adjustable voltage feature. Based on our patent-pending technology, the LPS1000 offers four discrete voltage levels, which enables a wide range of outdoor network and security applications and significantly reduces the complexity of outdoor network installation, integration and ongoing network maintenance. The LPS1000 boast the following features:

Features	Description
Remote Management	Remotely configure and manage each independent powered network port of the LPS1000 via web browser
All Weather Enclosure	IP67 enclosure rating and water tight connectors based on patent pending technology
Independent Port Voltage Adjustment	Adjustable DC Voltage with PoE voltage of 12VDC, 24VDC, 48VDC, and IEEE 802.3af compatible
Voltage and Power LED display	Bright LED indicators showing operation power levels at each network port
All Weather Enclosure	IP67 enclosure rating and water tight connectors based on patent pending technology
5-Port PoE Switch	Connect up to 5 PoE devices or uplink switch at 10/100 mbps speeds with Auto-MDX cross over feature.
Flexible Mounting Options	Easy to install brackets allows wall or mast of the LPS1000

The adjustable voltage, remote reset, individual port diagnostic, and many more features makes the LinkPower LPS1000 the industry's most powerful outdoor PoE Switch.

Tracy Tippett, North American Sales Director of Inscape Data, says "It is flexible, cost-effective, and includes easy-to-install, easy-to-configure, and easy-to-maintain features for connecting multiple outdoor wireless and video devices all at one installation location." Recognizing the importance of its simplicity and manageability, the LinkPower LPS1000 Adjustable Voltage Outdoor PoE Switch is capable of providing local or remote IP PoE voltage power configuration, i.e., adjustable voltage.

The LinkPower LPS1000 Adjustable Voltage Outdoor PoE Switch is the newest addition to our entire wireless and video surveillance product portfolio. Inscape Data is excited to deliver this unprecedented Adjustable Voltage Outdoor PoE Switch to the market."

A major demand in the Network Video Surveillance industries

The JP Freeman research estimates that network camera sales will exceed those of analogue cameras in the US by 2007 and that network camera sales will more than double those of analogue camera sales in the US network video market by 2008. According to the US-based report approximately 25 per cent of security users currently use network cameras, while 45 per cent have plans to buy the technology in the near future.

For purchasing information of the Link Power LPS1000 adjustable voltage outdoor PoE switch, please contact an Inscape Data channel partner.

Technology Corner: A Look Into License Free Radio Spectrum World Wide

In an Era of IP network explosion, the license-exempt wireless communication platform has expanded its role beyond simple voice communication. It has reached the mass market segment to provide a reliable alternative to hardwiring for voice over IP, IP TV, and security applications to name a few. There are several great reason why wireless is a preferred medium over hard wiring. Wireless is economical, faster time to deployment, secure, and reliable. In many cases, wireless is the only option.

License exempt wireless is available worldwide in several frequency bands. The most popular and uniformly accepted is 2.4GHz frequency. 2.4 GHz frequency allocation is adequate for voice and data communication therefore usage of cordless telephones and wireless computer access points worldwide find their home in this band. Among other license free bands, not all are uniformly acceptable worldwide. National restrictions may limit or omit the use of certain frequency bands for one country versus another country. The following map provides a rough overview of license free frequencies supported or not supported worldwide.

Figure 1. License Free Bands of the World - A Rough Overview

When considering wireless communication for security applications, there are two wireless technology options, proprietary or standardized. The install base for proprietary wireless technology is small and costly relative to standardized wireless technology based on Wi-FI (802.11). Wi-Fi is well proven and readily available since late 1998. It is also one of the most successful industry standards in history. Wi-Fi is experiencing rapid advancement with newer extensions released to enhance wireless performance. WiMax is another wireless standard rapidly gaining grounds and hold a lot of promise for the licensed bands. However, the industry anticipates cost effective WiMax equipment to emerge within a few years time frame. Long range wireless equipment by Inscape Data based on WiFi is available today and brings host of benefits to the security market. Table I provides a rough overview of license free bands and characteristics and use of each band if available in your deployment region.

License Free Frequency	Equipment Cost	Allowable Tx Power	Channel Bandwidth	Data Rate	Non-Line-of-Site Support	Purpose
315/433 MHz	Good	Good	Poor	Poor	Excellent	Voice
900 MHz	Good	Good	Poor	Poor	Very Good	Voice/Data
2.4 GHz	Excellent	Good	Very Good	Very Good	Good	Voice/Data/Video
5.x GHz	Very Good	Good	Very Good	Very Good	Good	Voice/Data/Video
24 GHz	Poor	Very Good	Very Good	Very Good	Poor	Data/Video
60 GHz	Poor	Excellent	Excellent	Excellent	Poor	Data/Video
FSO/Laser	Very Poor	Excellent	Excellent	Excellent	Very Poor	Data/Video

Table I. License Free Frequency Review (FSO, Free Space Optics)

Illegal or improperly use of license free radio equipment is a federal offense and extreme care should be considered when using it in your country. Confirm with national authorities when in doubt if a particular frequency band is considered license free or when a new frequency band will be available in your region. The following table provides information on fourteen regional spectrum management authorities and their website.

Country / Region	National Spectrum Authority	Website
Australia	Australian Communications and Media Authority	www.acma.gov.au
Brazil	Agencia Nacional de Telecomunicações	www.anatel.gov.br
Canada	Industry Canada	www.ic.gc.ca
China	Ministry of Information Industry	www.mii.gov.cn
France	National Frequency Agency (NFA)	www.anfr.fr
Germany	Federal Network Agency Bonn, Federal Republic of Germany	www.bundesnetzagentur.de
Italy	The Communications Regulatory Authority (Agcom)	www.agcom.it
Japan	Japan Ministries of Internal Affairs and Communications	www.soumu.go.jp
South Korea	Ministry of Information and Communication	www.mic.go.kr
Russia	Ministry for Communication and Information of the Russian Federation	www.gov.ru
South Africa	The Independent Communications Authority of South Africa	www.icasa.org.za
United Arab Emirates	Supreme Committee for the Supervision of the Telecommunication Sector	www.tra.gov.ae
United Kingdom of Great Britain & Northern Ireland	Office of Communications	www.ofcom.org.uk
United States of America	Federal Communications Commission	www.fcc.gov

Table II. Country or Regional Radio Spectrum Authority

Radio transmission power and antenna gain combination or EIRP at specific frequencies are primary technical considerations in deploying license free radio equipment. EIRP stands for equivalent isotropic radiated power and is defined by each country's spectrum authority. In the United States, equipment operating on 2.4 GHz frequency may not exceed a maximum of 36 EIRP for point to multipoint communication as stated in the FCC part 15 rules. License free radio spectrum is a great tool for the industrial, medical, and scientific community for the advancement of cost effective radio communication technology. After all, wireless is economical, faster time to deployment, secure, and reliable. In many deployment scenarios, wireless is the only option.

For inquiries regarding Inscape Data's license free radio equipment and wireless options for network video systems, please contact an Inscape Data channel partner.

Help Desk : Can a High Power AP with 1W Max Tx Power Cover 5 Mile Radius?

The most common question asked for the Inscape Data sales team is how far can the radios reach? This is a very valid question because if the wireless signal reaches short of the receiving radio, zero communication happens. Although an Access Point maybe specified for 5 miles, care should be considered for duplex or two ways data communication links.

In a nutshell, wireless duplex communication requires two or more devices to handshake. For duplex radio handshake, two main criteria must be met. 1st and foremost, The Tx power, the transmit signal power, need to be strong enough to reach the receiver and 2nd the Rx power, receive signal power; need to be above the receiver's threshold level. Often the misconception if the one end of the equipment can support a specified distance, the other end of the link may also support it. This is entirely true if the equipment on both end of the link is identical in specification. The assumption would need to be further considered if the equipment on both end of the link is dissimilar. The following scenario illustrates dissimilar equipment for a point-to-point link using one AB54E Pro and one notebook computer with integrated 802.11g. Table I summarizes the wireless signal reach for each equipment.

2.4 GHz Equipment	Tx Power	Antenna Gain	EIRP	Theoretical Line of Site Maximum Distance Reach
AirEther AB54E PRO	30 dBm	6 dBi	36 dBm	6 Miles / 10 km
Wireless Notebook Computer	16 dBm	2 dBi	18 dBm	0.5 Miles / 1km

Table I. Theoretical Distance Reached

The equipment in the table can transmit a signal of 6 miles and 0.5 miles theoretically. The limiting factor in this scenario is the wireless notebook with weaker Tx power and lower gain antenna. The maximum theoretical communication distance between the AirEther AB54E Pro and wireless notebook computer is 0.5 mile, the least common denominator.

There are other critical considerations for successful and reliable communication techniques including but not limited to interference, line of site, frequency band, cable loss, and weather. In most cases, shorter distance links are more tolerable than long distance links. Many of these details and wireless training are covered in the Inscape Data Certified Professional Training. Please contact an Inscape Data channel partner for more information.