2012/3/30 Peter C. Wallace <[email protected]>:
>
> Is your RJ45 pin 3 high? (high than pin 6) if not you likely have the +/-
> swapped on both RX and TX
>

Just to make sure that I correctly understand, what do You mean:

Pin 3 is Txa for 8i20, so I have connected to non-inverted input of
SN75179 chip. I really tried to extra careful to make them right - Tx
from my converter to Rx of 8i20 and vice versa.

I measured - pin 3 is 3,93 V above GND, pin 6 is 0,96 V above GND.

Viesturs

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