wifirab wrote

1. Does the serial number above tell us? Is it CPE220?

2. What does CPE mean?  

3. And the main question.  We've had some unreliability in conenction (85m line of sight with a dodgy hedge...);

4. what tool(s) is receommended to check the link etc

1. Does not look like a TP-Link S/N to me. You can find out the model by either looking at the label under the cover for the Ethernet ports or by logging into the web UI.

2. CPE stands for Customer Premises Equipment.

3. The hedge should not cause major issues for a 2.4 GHz link over 85m. But antenna alignment, interferences etc. can do so.

4. The Status page gives plenty of information about the quality of the wireless link. Several tools in the Tools menu can assist in testing the link quality (antenna alignment, speed test, spectrum analysis etc.).

wifirab wrote

Thanks. I've got the credentials and determined that we've got a pair of CPE510s.

I'll have a look at Tools.   A couple of pages of AP details attached.  Anything obviously wrong?  Thanks.

A 5 GHz device is much more sensitive to obstacles like hedges compared to 2.4 GHz.

If possible, try to mount them at a height above the hedge.

Settings are fine, but I would set 802.11n-only WiFi mode and fixed 40 MHz channel width.

To see the signal quality (Signal strength, noise strength, SNR, CCQ) you need to look at the client CPE (an AP will always show 100% CCQ).

To find out the WiFi throughput, use the built-in speed test, see the Tools menu. Start a speed test with one CPE as the server and run the test on the other CPE by specifying the IP of the server (it doesn't matter which CPE is server/client for the speed test).

@wifirab, yes, this is a pretty good signal. Last idea I have is that the disconnects happen due to weather radar activity which forces RLAN devices to release the channel if DFS is required (as is for channel 136). Unfortunately, you can't do much in this case.