I just wonder if it would be possible to use open BTS with one DBSRX (receive only, 0.8-2.4GHz) and  one RFX1800 daughterboard ?

I don't have a second RFX daughterboard but I guess that only one is making the downlink (transmitting), the other one getting the uplink from the mobile phone (receiving).
Or is it because it is not possible to have the BCCH + TCH channels on the same board ?

If it is impossible than I will have to consider to make the investment for a second RFX1800 daughterboard.

Thank you for your answer