Does anyone know what the maximum loop length for a typical voip FXS ATA like a SPA2012 is?
Could it provide the same voltage / milliamps as a telecom exchange and serve a line 5km in length with 3 phones attached on the single FXS port

or are they just a single phone, device with a 100m loop length limit?

Am wondering because I have a project where a farmer wants to put up some telephone wire to connect his house to a couple of farm sheds around the property up to 1km away. We already have voip systems in the office building using the 3CX pbx system so this would just be another extension, and its easier to run an analog telephone signal (in theory from an ATA) than ethernet with its limit of 100m.


Thanks