Liberty Park - Salt Lake City, UT:

Deployment: July 3, 2006. Status: Phase 1 Completed.

Phase 1 consists of two locations, which include four access points, one downlink, and one backhaul.

The primary site required installation of a heavy duty tripod secured to a reinforced base, as well as a universal roof base mount which was used to secure the bottom of the mast. A 16 foot mast was then raised with two 2.4GHz 14dBi 120 degree sector antennas, one 5GHz 19dBi panel antenna, and one 5.8GHz 26dBi grid parabolic antenna. Four guy-wires are attached to this mast, making the mast very stable. A diecast enclosure was used to house a IXP420 WAR. Two Atheros AR5004X radios provide the downlink and backhaul connectivity, and two Compex WLM54G radios for local 2.4GHz coverage via the sector antennas.

The second site required installation of two 10 foot masts, secured with three heavy duty wall anchor brackets. Both masts have a single 14dBi 120 degree sector antenna. On the main mast, a 5GHz 19dBi panel antenna was installed, along with the outdoor enclosure, and IXP420 WAR with three radio's (one AR5004X, and two Compex WLM54G's).

Installation started off a bit shaky the first afternoon. The roof of the primary site leaves much to be desired. Mounting of the tripod without support of the trusses below it proved to be a failure, as the underlayment of the roof is just too old to hold the lag bolts. The mast also started off as 21 feet which turned out to be too tall and heavy for us to safely raise and initially secure it in the tripod.

The next morning, after going over our options, we decided to shorten the mast by five feet, and add two 2"x8"x48" pressure-treated planks. The planks were predrilled into two roof trusses, and then secured with a handful of wood screws. The tripod was then bolted on with lag bolts, and the 16' mast was then installed. Four guy-wires are secured at 11' up the mast, and attached to the roof with turnbuckles and hook bolts.

Overall the installation of both locations went well on the second day. The weather was quite hot and semi-humid, and we managed to get a bit too much sun. But fortunately the SNR's for the backhaul/downlinks are great, and I can go find a spot to sit under a shady tree, and get pretty a good signal to the sectors (no LOS).

Pioneer Park - Downtown, Salt Lake City, UT:

Deployment: April 24, 2006. Status: Completed.

The installation consists of one WRAP 2C board, utilizing one CM9 radio and one Senao NL-2511MP radio. The CM9 radio will downlink from City Creek tower. The 2511MP will provide the local 2.4GHz coverage via an omni antenna.

Deployment went very well, with no surprises occuring. At first I visually aimed the 5GHz panel, and when I went back to tweak it once the radios were online, I found I had aimed it dead on the first time. Coverage reaches the Northern most parts of the park, and my speedtest indicates the speed is nearly optimal for the QoS rate limiting I have in place.

City Library Branches - Downtown, Salt Lake City, UT:

Deployment: October 05, 2005. Status: Completed.

Each City Library branch consists of a WRT54GS, and tunneled connection.

There are five other City Library Branches in the Salt Lake valley. A Linksys WRT54GS, running OpenWrt was installed in each location. Two of the locations required use of an extra access point to provide full coverage. VTUN was used to tunnel all traffic back over to the Main Library branch, where it then gains Internet connectivity. This allows a patron to go from one location to another without having to change IP addresses, or having to reauthenticate with ChilliSpot.

Deployment was very easy. It mainly consisted of making sure the CAT5 jack was active, and on the proper VLAN. The only update which eventually will occur is converting over to OpenVPN, which is essentially VTUN with key certificates and expanded encryption.

Main Street - Downtown, Salt Lake City, UT:

Deployment: Summer 2005. Status: Completed

Main Street consists of four access points, one quasi access point, three downlinks, and one backhaul.

The backhaul uses WRAP boards, with Atheros CM9 radios. This bounces from our building over to a location on Main St. From there another WRAP and CM9 runs in AP mode to provide 5GHz connectivity to all three of the downlinks. A WRT54GS at this location acts as a limited AP, where instead its main function is for WDS connectivity to an AP out on the first block. The next three blocks consists of a WRAP, which uses an Atheros CM9 radio to downlink from the main location. A Senao NL-2511MP radio acts as the 2.4GHz access point.

The original plan called for just two WRAP's, and five WRT54GS, half of which would have relied on WDS. This plan was scraped after further checking revealed no constant 120V AC at the head end, which would have been at the intersection of South Temple and Main St. This actually worked out for the best though, because now I only have to rely on one WDS link, which is only 80ft apart. I found that with trying to span one block, zigzagging across the road, the UTA TRAX train would cause the WDS link to drop. Visually inspecting it from the pole, the metal sweepers extend into the fresnel zone, and probably cause a bit of RF noise. To fix this problem, two 19dB panels powered by the WRAP w/ CM9's, was installed. This new link holds steady at 39dB SNR, and now when TRAX comes through, it only drops to 34dB, with no packet loss.

Over the course of a couple months, the finishing touches were implemented. Three of the WRT54GS units were replaced with Senao NL-2511MP 200mw radios. The backhaul location was also changed, which allowed for all blocks to easily reach the primary 5GHz AP. With all locations able to reach the main backhaul, the extra 19dB panel and CM9 radio was be removed.

Gallivan Center - Downtown, Salt Lake City, UT:

Deployment: August 2005. Status: Completed

Gallivan Center consists of three access points, and one downlink connection.

A WRAP 2C board with two CM9's act as the primary distribution point. One CM9 provides the XM downlink from City Creek tower. The other CM9 runs as an AP, providing the 2.4GHz public signal. An Ethernet connection then runs to the other end/side of the building where a WRT54GS runs in AP and WDS mode. This provides a second layer of coverage. From there a second WRT54GS sits on another building, connected via WDS to the other WRT54GS, providing a third layer of coverage. With these three AP's, we have nearly full LOS coverage of all angles, and the last area that isn't LOS, the signal is still usable, albeit diminished a little.

Deployment of this location nearly followed the original plan. The only change was the second WRT54GS AP, which was going to be installed on the roof of another structure. It was going to WDS link to an AP out on Main St, but in the end the final location worked out better.

Main City Library - Downtown, Salt Lake City, UT:

Deployment: Summer 2003. Status: Operational, but new additions coming soon (August 2005).

The City Library consists of five access points, one gateway router, and one downlink connection.

On the roof of the Library, we have a Linksys WET11 bridge, running a custom firmware, which downlinks from an AP on our building. I had built a cantenna out of a SpaghettiO's can (Instructions found here) a few months earlier, and at the time was the only antenna I had available. So we mounted this cantenna, and it worked great. The cantenna was only meant to be temporary, and as such, was replaced a few months later with a miniature antenna from Pacific Wireless MD24-12.

A PC, running Pebble Linux operates as the gateway, with two NIC's, one to the WET11, and one to the internal private LAN. This private LAN extends to the five AP's deployed inside and outside the Library.

The Access Points are deployed as: one per floor, staggered (East or West), frequency shifted, and operate at ~500mw EIRP. Four AP's cover the four main floors, and one AP operates an outdoor antenna, which covers most of the Plaza. The indoor AP hardware consists of an EPIA 5000, running Pebble Linux, an EnGenius 2511 CD+ PCMCIA radio, and a HyperLinkTech 7dB antenna w/magnetic base. The outside AP consists of a Linksys WRT54GS, which is connected to a SuperPass 180 degree sector.

Over the next couple weeks the outside AP will be moved, and paired up with a second AP and 180 degree sector antenna (or use a PC with two 2511's). With the sectors moved over to the Crescent Wall, this will give expanded coverage to the East side of the Plaza.