2013/8/24 Alexander Chemeris <alexander.chemeris@gmail.com>

Your log doesn't show any user activity, so you either (1) haven't
enabled enough logging or (2) your phone is not attached to the
OsmoNITB network.

<0004> abis_rsl.c:1438 (bts=0,trx=0,ts=0,ss=0) Activating ARFCN(869) SS(0) lctype SDCCH r=OTHER ra=0x13 ta=1
<0004> abis_rsl.c:1166 (bts=0,trx=0,ts=0,ss=0) CHANNEL ACTIVATE ACK
<0000> abis_rsl.c:1628 (bts=0,trx=0,ts=0,ss=0) SAPI=0 ESTABLISH INDICATION
<0002> gsm_04_08.c:910 <- CM SERVICE REQUEST serv_type=0x08 mi_type=0x04 M(1622723192)
<0002> gsm_04_08.c:832 -> CM SERVICE ACK
<0001> gsm_04_08.c:142 (bts 0 trx 0 ts 0 pd 05) Sending 0x21 to MS.
<0000> abis_rsl.c:1628 (bts=0,trx=0,ts=0,ss=0) SAPI=0 DATA INDICATION
<0003> bsc_api.c:498 CLASSMARK CHANGE CM2(len=3) CM3(len=5)
<0000> abis_rsl.c:1628 (bts=0,trx=0,ts=0,ss=0) SAPI=0 DATA INDICATION
<0002> ussd.c:58 USSD: Own number requested
<0000> chan_alloc.c:406 (bts=0,trx=0,ts=0,ss=0) starting release sequence
<0003> gsm_04_08_utils.c:231 Sending Channel Release: Chan: Number: 0 Type: 1
<0004> abis_rsl.c:634 (bts=0,trx=0,ts=0,ss=0) DEACTivate SACCH CMD

I call that an USSD request.