Wireless Networking (802.11)
SJI upgraded its service offering by moving into a shared space with API Wellness and project Open Hand over on Polk St. This move involved setting up a new VoIP system with a Digium TDM410, 2 analog trunks, and 5 sip trunks. The Snom M9 handset is their deskphone solution.
On a recent residential Wifi installation in a Mission District apartment not only was the 2.4gHz spectrum saturated, but the 5gHz range was as well. All of the neighbors had their access points configured to use 80mHz channels at max transmission power. Attempting to provide coverage in dense metro environments in the 5gHz spectrum with a single high powered access point is a bad idea.
St. James Infirmary, the sex-worker lead occupational resource center located at 730 Polk St., previously at 234 Eddy St, was at the first floor of a 6 story building that created a cellphone dead zone. An amplifier was required to provide service to the first floor office. From the roof a directional antenna was installed pointing towards one of the downtown towers, LMR 400 was run down the side of the building into the server closet connecting a WeBoost Connect 4G-x, from where more LMR 400 connects to the internal antenna. There is still not complete coverage to the whole office with a single antenna, but this kit could be upgraded with an additional 3 indoor antennas that would complete service to the entire office if there was sufficient funding.
The Flowershop Collective is a long running artist space in San Francisco. Soon after moving to the west coast I became familiar with the space because of the skate-park that is built inside. The space was under pressure from the city to verify its compliance with local fire regulations in the after math of the Oakland Ghost Ship fire. I responded to a call to the larger community for assistance in preparing for a walk through with the fire marshal.
St. James Infirmary was forced to move under the financial pressure of the tech industry in SOMA [1, 2, 3, 4, 5]. Fortunately for them and their community they were able to move to the Tenderloin where they are surrounded by other overlapping neighborhood social services. The office opened with a working intranet with wifi coverage, analog voice service, and a number of printers. Coming soon: DTMF door access control, and extended cell phone service via micro-cell amplifier.