Cambium Newbie Question PTP

I am trying to design a campground wifi it will be fairly rural and the 2.4ghz spectum is uncrowded and I want to use the E501S sector AP. This project will be done in phases and this will be phase one. I am having problems deciding which PTP solution I want to use for backhaul  in the 5GHZ. The first phase  jump will be really short only about 250 feet I would like for there to be room to grow bandwith wise as the customer increases their bandwith right now they are looking at 30/30 fiber moving from 6MB DSL. Is there a PTP solution that could provide the room to grow if they later move to 200 to 300 MB. This PTP link will have probably 75% clear line of site mounted at around 18 to 20 FT to clear the RVs. This is Florida so it's flat.  I am sure I have left out some needed info so ask away. Thanks in advance.

Hello and welcome!  There is an abundance of information available on this community, as well as, the KB, webinar archive, Cambium College and YouTube channel.  I'll post some links at the end of this post that may help in the future.

As for your specific question, I would highly recommend using our free LINKPlanner design tool (overview video) to estimate out performance using various products.  In general, you are probably looking at an ePMP PTP design (bridge in a box, Force180/190/200/300).  Throughput is going to be heavily dependent on channel size and SNR.  A 40MHz wide channel will give you ~250Mbps of aggregate (downlink and uplink) capacity, whereas an 80MHz wide channel will be closer to 600Mbps).  These numbers assume a clean channel and the Force180/190/200 support up to 40MHz wide channels (Force300 up to 80MHz).

Another low cost option is the PTP550.  It actually has 2 radios inside of it, capable of 80MHz wide channels each, for a total headline rate of 1.3Gbps+.  With the asymmetrically, non-contiguous channel bonding feature, you can select any combination of channel sizes for the two radios (e.g. 2x20MHz, 1x20MHz and 1x80MHz, etc.).  This gives you flexibility in channel and frequency band selection.  You can use two 20MHz wide channels now and increase the channel size as your throughput requirements change.  Also, the multiple channels will give you better interference mitigation should the spectrum become congested (the radio will change channels to avoid interference).

Here are some useful links:

Corporate Page:

Main Support Site:

Support Community:

cnMaestro Network Management:

Webinar Archive:

YouTube Page:

Cambium College:

Technical Training:

LINKPlanner webinar:

You could try Cambium's Bridge-in-a-Box solution.. it's a low cost, turn key PtP for speeds up to 200mbps. Should work fine for this application. Just make sure that you configure the 5GHz interface on the E501s to avoid whatever channel you'll be using for the PtP so they don't conflict.

1 Like

the bridge in a box will work well.  

if you plan on installing many of these, very close together you may want to consider using a GPS lite AP instead of the force 180 setup.   the GPS is useful in the means of controlling your own interference and letting you re-use your channels.  

BUT if your only planning on using 3 or 4 bridges in the same location, and that's largely it, no need to switch to gps.