Crash of UmTRX transceiver with dual TRX

Andreas Eversberg andreas at
Mon Jul 8 20:01:48 UTC 2013

Alexander Chemeris wrote:
> And this leads us to the question that POWEROFF in the umtrx_dual_test
> is not implemented at all.
> Thomas, could you please rebase the umtrx_dual_test onto the recent
> "fairwaves/master" branch? The DriveLoop/Transceiver split breaks a
> number of patches and it would be better if you do it yourself.
oops, i did a mistake. even single trx support never supported poweroff. 
the reason why it worked for me is that i send "SETTSC" and "SETBSIC" 
commands to the transceiver. (calypso-bts requires "SETBSIC" because it 
generates SCH itself). because one of these commands will fail, osmo-bts 
ignores the response, so it does for "SETTSC".

i think it is not a clean solution to send both commands and ignore the 
result. the "POWEROFF" should shutdown transmitter, stop receiving and 
allow "SETTSC" (even with different value) again.

More information about the UmTRX mailing list