Nope. XfinityWiFi is Comcast. They configure their subscribers "gateway" boxes to allow anyone with a Comcast login/password to use the bandwidth. They do not install poletop wi-fi repeaters or access points. The address shown is Live Wire, which is the Comcast cable internet subscriber:
-- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
Mesh networks usually use omnidirectional antennas. Put a directional antenna on a mesh and it will only work in that direction. There are some 120 degree sectorized panels, which when combined in threes, forms an omni. These are also use to monopolize all 3 non-overlapping
2.4GHz wi-fi channels (1, 6, and 11). The 6 coaxes might be two polarizations per panel, times 3 antennas.Just to complexicate things, Alvarion sells a similar system, where the RG-6/u coaxes feed RF at about 70Mhz(?) and up/down convert to/from the desired 2.4GHz channel in the antenna. However, they use much nicer looking and larger sector antenna.
I found this DAS (distributed antenna system) install that looks somewhat like the San Jose photo: The antenna radome is the same color and about the same size: and the battery pile looks something like the one in the San Jose photo: but with only 2 coax cables and a much neater installation.
PG&E has two types of smartmeter (meter reading) systems. The electric meter system runs on 900MHz FHSS (frequency hopping spread spectrum) in the form of a mesh network. There are a few pole top access points which transition the data from RF to a wire line or fiber backhaul. The San Jose photo might be one of these systems as
60 degree sectors would allow for considerable frequency reuse, which would be very useful as the traffic tends to increase substantially near the wired access points. The natural gas system runs on about 162Mhz(?) as NBFM (narrow band FM) and is also a mesh. The antennas on the pole top access points look like larger vertical fiberglass base station antennas.That's also my question. All 6 coaxes appear to transition from the upper long pipe, to a pipe going into the ground. There's no below ground equipment vault, so where do they go?
I can't tell which of these signs is in the Google street view photo: This one looks like a possible match:
-- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
Diversity works best when the antennas are separated by at least one wavelength. More is better. The radome isn't big enough. Same with MIMO unless they're using polarization diversity.
Sorry, but I don't see that.
I don't think so. Carbon fiber makes a great RF absorber. Find some CF and put it in your microwave oven. Here's a preview:
That's easy. It's a sloppy installation. I don't see a rams head on the top pipe, or any manner of water protection on the lower pipe. Water will just slither down the coax cables, into the pipe, and fill it full of water.
-- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
There is a stick of lumber (8x8 inch?) stubbed atop the pole that supports the antenna assembly. The 2 pegs look like foot pegs for a service tech?s boots.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.