Copyright AvaLAN Wireless 2011 Installing AvaLAN Wireless Ethernet Systems Presented by Michael Derby AvaLAN Wireless Systems

Copyright AvaLAN Wireless 2011 AvaLAN Wireless Ethernet Radio Systems The most common questions… Do I need backhaul, multiple access or mesh solution? How far will the link go? How does the data rate change with distance? How is security handled? How does the system handle interference? How to setup and debug an installation? Can the system provide multiple access? How to install multiple systems in close proximity? What to do about lightning?

Copyright AvaLAN Wireless 2011 What is the difference between backhaul, multiple access and mesh? Backhaul solutions are optimized for fixed point to point connections. Simple to install and maintain. Multiple Access solutions (Wi-Fi) are optimized to support many simultaneous transient users at short range. Great for cafes, homes, airports. Mesh systems require high node density. They are complex systems and are expensive to buy, install and maintain. Great choice if you have a big budget.

Copyright AvaLAN Wireless 2011 “Backhaul” systems with directional antennae 17 miles Location #1 Location #2 Location #3 Main Location Point to Point radios – each subscriber gets a dedicated radio link for maximum throughput.

Copyright AvaLAN Wireless 2011 “Backhaul” systems with directional antennae 4 miles Location #1 Location #2 Location #3 Main Location Omni Antenna Multipoint radios – data rate is shared between subscriber radios

Copyright AvaLAN Wireless 2011 “Sector antennae” 17 miles Location #4 Location #3 Main Location Location #2 Location #1 “Directional antennae” Multipoint radios – data rate is shared between subscriber radios in sector

Copyright AvaLAN Wireless 2011 “Portable or Mesh” systems with Omni antennae 250ft Main Location Omni Antenna Multipoint/mesh radios – Data is shared and repeated between subscriber radios 1,000ft

Copyright AvaLAN Wireless 2011 Mesh and Spoke

Copyright AvaLAN Wireless 2011 How far will the link go?

Copyright AvaLAN Wireless 2011 How far will the radio go? Radio Link Budget – Free Space Loss = System operating margin System operating margin >18dB is safe

Copyright AvaLAN Wireless 2011 Link Budgets At 900Mhz with 15dBiwith 2.5dBi + transmitter power 21dB21dB + transmitter antenna gain 15dB2.5dBi – transmitter cable losses 0dB0dB + receiver sensitivity 97dB 97dB + receiver antenna gain 15dB2.5dBi – receiver cable losses 0dB0dB ____________________ _____ _____ Link Budget= 148dB123dB At 5800Mhz with 23dBi with 5dBi + transmitter power 21dB21dB + transmitter antenna gain 23dBi5dBi – transmitter cable losses 1dB0dB + receiver sensitivity 97dB 97dB + receiver antenna gain 23dBi5dBi – receiver cable losses 1dB0dB ____________________ _____ _____ Link Budget= 162dB128dB

Copyright AvaLAN Wireless 2011 Free Space loss Free space loss = 20log(Freq in MHz) + 20log(distance in miles) Distance900MHz:5800MHz: 0.1 mile has 76dB of loss92dB of loss 1 mile has 96dB of loss112dB of loss 10 miles has 116dB of loss132dB of loss 50 miles has 130dB of loss146dB of loss

Copyright AvaLAN Wireless 2011 Line of Sight Examples: Will a 5.8Ghz AvaLAN link work at 40 miles using 23dBi panels on both ends? Yes: Link budget (162dB) – Free space loss (144dB) = System operating margin (18dB) Will a 900Mhz AvaLAN link work at 50 miles using a 15dBi yagis on both ends? Yes: Link budget (148dB) – Free space loss (130dB) = System operating margin (18dB) Will a 5.8Ghz AvaLAN link work at 5 miles using a 5dBi omni and a 23dBi panel? Yes: Link budget (145dB) – Free space loss (126dB) = System operating margin (19dB) Will a 5.8Ghz AvaLAN link work at 3/4 mile using 5dBi omnis on both ends? Yes: Link budget (128dB) – Free space loss (109dB) = System operating margin (18dB)

Copyright AvaLAN Wireless 2011 Diffractive Non-line-of-sight 900Mhz 2.4GHz 5.8GHz 20ft 10 Degrees 500 ft Angle of Attack 10 Degrees 2 Miles Angle of attackDistance 1°10 Miles 5°5 Miles 10°1 Miles

Copyright AvaLAN Wireless 2011 Penetrating Non Line of Sight Up to 1500ft

Copyright AvaLAN Wireless 2011 Path loss calculations - Indoor

Copyright AvaLAN Wireless 2011 Path loss calculations - Indoor See our online path loss white paper at:

Copyright AvaLAN Wireless 2011 How does the data rate change with distance? The data rate should only be affected by the added speed of travel delay. A 50 mile link will have a 3% data reduction due to speed of travel impact on packet timing.

Copyright AvaLAN Wireless 2011 How is security handled? AES keyed encryption – FIPS 197/140-2 Encryption at the application layer is becoming a preferred technique for securing sensitive communications. (VLAN/VPN/SSL/TSL)

Copyright AvaLAN Wireless 2011 Robust against interference? How does the system handle interference? In band and out of band? How easy is the system to intentionally jam? Is the system able to autonomously coexist or is a truck roll required to perform a site survey and change channel ?

Copyright AvaLAN Wireless 2011 Multi-Point Network Topologies

Copyright AvaLAN Wireless 2011

How to setup a system? Point to Point systems are shipped ready to run. Multi-Point systems require 2 steps to create the network. Step 1 – choose the unit to be the access point and set network and crypto keys Step 2 – join each subscriber to the access point via same keys Auto frequency selection… No crossover cables needed… Check the link quality… Check the ETH link LED… Ping something on the other side…

Copyright AvaLAN Wireless 2011

How to setup multiple systems in close proximity? Use high gain antennae to isolate and direct energy… For Pt to Pt, Keep the units paired together… Setup one link at a time with the others off… Adjust antennae to create sufficient isolation between links use angular, polarization, spectral and spatial separation…

Copyright AvaLAN Wireless 2011 Isolation techniques Delta Angular Horizontal Polarization Vertical Polarization

Copyright AvaLAN Wireless 2011 Power supply options? AvaLAN offers two power supply accessories. Indoor AW12V - cigarette lighter powered mobile applications. Outdoor AW24V - 24VAC power common in security markets The radios can be POE powered from 12VDC to 48VDC. For solar applications it is possible to power the radio in continuous transmit with 12VDC at 120mA = 1.5 Watts of power draw.

Copyright AvaLAN Wireless 2011 How to provide lightning protection? AvaLAN’s antennae are DC grounded. However, the use of inline lightning suppressor is always a good idea. Mount the antenna at least 3ft from the top of a grounded pole

Copyright AvaLAN Wireless 2011 Thank you! Sales - (866) Support (650) Michael Derby -