Just ignore replies by rextended, he believes that for every question he always needs lots of information and posts the same reply to everything.
To the point: signal of -92dBm is too weak for a reliable connection, and when you get that over 700m it means (when there is no obstruction between the endpoints or the dishes are not pointed correctly), maybe the transmit power is very low.
What is the gain set to (in advanced mode for the wireless interface)?
What is the TxPower set to?