BTS using osmocombb trx

Hello dear osmocom team first off, thanks for all the work you have put into this project. Its great to have a starting point for toying with this new/old technology. ;) I got myself a C155 and have used osmocom-bb on it to read some traffic with wireshark. So far everything works nicely. Now i wanted to communicate with a second phone and have tried setting up a BTS following this guide http://openbsc.osmocom.org/trac/wiki/network_from_scratch (using a single phone) My problem is that the phone doesnt transmit anything. Yes i have enabled the transmitter flag in the Makefile. ;) When i use osmocon to load the TRX into the phone and start the osmocom-transceiver i get this debug output from osmocon. ... Synchronize_TDMA =>FB @ FNR 26585 fn_offset=2002505 qbits=4924 LOST 1910! BTS MODE: 255 65535 {0,0,0,0,0,0,0,0} TX 0..7 RX 0..7 After taking a look at the code the values seem weird and they come from the transceiver function l1ctl_tx_bts_mode() like that. /host/layer23/src/transceiver/l1ctl.c:120 As a test i got the phone to transmit something by overwriting the values on the TRX side. I havent gone further yet but wanted to ask if someone could maybe point me to an obvious mistake i did before i spend more hours on this issue. A hint as to how i enable the different logging settings would be great as well. thanks, best regards, Christian