I had seen this earlier on a TP-Link CP210, but hadn't pursued it. This is on a NSM2. Both are running released firmware (3.16.1.0)
This is using Firefox 48.0.1 on Fedora Linux 24 / Plasma.
I believe I've seen screenshots where the slider has a marker you can grab and slide. I've verified it's there as I can change the distance setting; it's just not displaying.
![](image/png;base64,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)
This is using Firefox 48.0.1 on Fedora Linux 24 / Plasma.
I believe I've seen screenshots where the slider has a marker you can grab and slide. I've verified it's there as I can change the distance setting; it's just not displaying.
I think the documentation says/implies a distance of 0 (Zero) should work as "automatic" (?).
But the configuration will not save with it set to 0 (Zero).
The slider will not let me set it to anything less that 1000 Meters.
All seems to work, but is this correct behavior?
From the 3.16.1.0 help file:
The Distance setting adjusts the packet retry timer to account for stations that are very far away, presumably about 300 meters or more. The value should be set to the distance in meters to the farthest node that you expect to communicate with. Change the distance value by moving the slider. Distance values will be in multiples of 1000 meters (approximately 0.62 miles). A value of zero is not allowed.