Try Serial Port Splitter - https://www.eltima.com/products/serialsplitter/

I used THESE
<https://www.amazon.com/HUACAM-Ethernet-Injector-Connector-Simultaneously/dp/B077GMTVCN/ref=sr_1_5?s=electronics&ie=UTF8&qid=1520952193&sr=1-5&keywords=rj45+splitter>
to send PowerFlarm portable outputs to my ClearNav and to my K6BTs (to
feed Dell Streak/XCSoar) and to send position/vario data from the
ClearNav XC vario to the ClearNav and to the Streak.Â* Note that I set
the streak as a one-way interface, in only.

On 3/13/2018 6:46 AM, wrote:
> Try Serial Port Splitter - https://www.eltima.com/products/serialsplitter/

--
Dan, 5J