Hello,

> Command : ./osmocon -m c123xor -p /dev/ttyUSB1 -s /tmp/osmocom l2 -c target/firmware/board/compal_e88/trx.highram.bin

Before running a base station, please at least learn how to access the
filesystem in UNIX based operating systems. Apparently, there is
directory 'target' in 'src/host/osmocon'. It's in 'src/', so either
run osmocon from 'src', or use
'../../target/firmware/board/compal_e88/trx.highram.bin'.

For more details, see: https://osmocom.org/projects/baseband/wiki/CalypsoBTS.

With best regards,
Vadim Yanitskiy.