confused by osmo-bts rsl.c:bts_supports_cm()

Hi All. posting to the list here rather than going down the line of a ticket as I'm using the nitb to configure my bts and so this may not be a bug, but rather a missing back port to legacy. (which may not be appreciated here, I'm aware!) Anyway, this is the scenario: I noticed a lack of audio with latest osmo-bts, and this log message: <0000> rsl.c:1503 invalid mode/codec instructed by BSC, check BSC configuration.  I added some logging in osmo-bts to check what was being passed into this line in rsl.c: if (bts_supports_cm(lchan->ts->trx->bts, lchan->ts->pchan, lchan->tch_mode) != 1) and the values are 0 (zero), GSM_PCHAN_TCH_F_TCH_H_PDCH  and GSM48_CMODE_SPEECH_AMR but bts_supports_cm() only checks against GSM_PCHAN_TCH_F and GSM_PCHAN_TCH_H Is it that osmo-bsc is sending the actual current channel mode now, whereas the osmo-nitb is sending the configured mode, i.e. TCH_F_TCH_H_PDCH ?? in which case, sorry to bother you, but I will ask: should we try to keep basic functionality between BTS and nitb for a little while longer :) Or are we missing checks for all possible modes in rsl.c:bts_supports_cm() Related commit: http://git.osmocom.org/osmo-bts/commit/src?id=a4bca1155 Thanks!! k/