Installation of the central node

From blog.othernet.xyz
Jump to: navigation, search

About

The central node of the network is located at POWRPLNT. For many of us this installation was our first, and we ran into a lot of trouble along the way. We began installation Sunday, May 27 at 10:00 AM and ended around 8:00PM. There was a lot of periodic rain and wind, which made the installation a bit treacherous, but we were able to install the networking infrastructure by the end of the day.

Goal

Our goal was to create a 7 block Othernet Territory. To achieve this we used sector antennas to distribute public Othernet wifi to Evergreen Avenue. We were able to achieve limited backhaul through NYCMesh using a 10 foot pole mounted on the roof.


Milestones

These were the steps and milestones that occurred along the way.

Purchasing Hardware

We purchased the initial Othernet Equipment like the server and the antennas before the install. Initially we wanted to buy 4 foot aluminum conduit of 1.5 inch diameter and stand off brackets to Home Depot did not have the correct material or sizes so we had to improvise. See the Mounting Equipment section.

Initial Configuration of LiteBeam AC

When we arrived at POWRPLNT it was raining pretty bad, so we familiarized ourselves with the equipment. One major take away is that, when connecting to the Mikrotik the first time, you should use the Wifi Access point it sets up instead of a wired connection. For some reason we could not SSH into it directly with a cable.

Initial Configuration

POWER

A wonderful smelling apartment on the second floor provided us with an outlet next to a window for us to use. Essentially by using a POE injector we ran a cable from this apartment to the Omnitik router on the roof. This router provides 5 POE ports, and this is how we power our various antennas.

A Second Trip To Home Depot

Our brackets did not fit our pipe, our bolts weren't long enough, we didn't have sealant for the holes that we drilled, we didn't have a the right drill bits, our pole wasn't long enough, we didn't have electrical tape, and we didn't have needle nose pliers....so we bought these things.

Mounting the Directional LiteBeam

Getting Backhaul

Incorrect Sector Antennas

Replaced Sector Antennas with Mesh Pro AC

Mounting Equipment

Initial Configuration

Screws and Bolts

Outdoor 2 Inch threaded bolts.

Sealant

Polyurathane Roof Sealant

Pole

10 foot aluminum conduit

Brackets

1-1/2 Two Hole Strap. Looks like a Horseshoe kinda.

Crimping Cables

Inside the ethernet cable, there are 8 color coded wires. These wires are twisted into 4 pairs of wires, each pair has a common color theme. One wire in the pair being a solid or primarily solid colored wire and the other being a primarily white wire with a colored stripe (Sometimes ethernet cables won't have any color on the striped wire, the only way to tell which is which is to check which wire it is twisted around). Examples of the naming schemes used are: Orange (alternatively Orange/White) for the solid colored wire and White/Orange for the striped cable. The twists are extremely important. They are there to counteract noise and interference. It is important to wire according to a standard to get proper performance from the ethernet cable. The TIA/EIA-568-A specifies two wiring standards for an 8-position modular connector such as RJ45. The two wiring standards, T568A and T568B vary only in the arrangement of the colored pairs. Tom writes to say "...sources suggest using T568A cabling since T568B is the AT&T standard, but the US Government specifies T568A since it matches USOC cabling for pairs 1 & 2, which allows it to work for 1/2 line phones...". Your choice might be determined by the need to match existing wiring, jacks or personal preference, but you should maintain consistency. I've shown both below for straight through cabling and just T568B for crossover cabling.

Weather

It was shitty.