All: The link looks fine for a few minutes after a reboot. After some time, the '/status' ;Signal/Noise/Ratio' shows 'N/A' and the link is down. Yet the '/signal' page still shows the normal S/N/R of about 14 dB. I have downgraded both ends to 3.16.1.1 and all seems as before the firmware upgrade. LQ/NLQ 100%/100%, TxMpbs 13 to 26 . Chuck