IP Access nanobts dropping OML link to OpenBSC

Hi All, I'm very new to OpenBSC and nanoBTS (but have quite a bit of experience in telecoms in general). I recently acquired a brand new ip.access nanoBTS (nanoGSM) for a project I'm working on and I promptly installed OpenBSC on Ubuntu 11.04 successfully without any headaches. So far I've managed to do an "ipaccess-find" and found the BTS, and also set the Unit ID of the nanoBTS + OML address using the "ipaccess-config" utility. My problem is, when I startup osmo-nitb, I can see the BTS trying to connect and then it sends a NACK and OpenBSC drops the links. Below is the output I get on the screen when I startup osmo-nitb: /home/beta/libosmocore/openbsc/openbsc/src/osmo-nitb# ./osmo-nitb -debug=DRLL:DCC:DMM:DRR:DRSL:DNM:DSMS:DMNSMS:DDB:DMEAS -c openbsc.cfg DB: Database initialized. DB: Database prepared. <0007> sms_queue.c:232 Attempting to send 20 SMS <0007> sms_queue.c:292 SMSqueue added 0 messages in 0 rounds <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=BTS(01) INST=(00,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,00) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,01) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,02) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,03) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,04) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,05) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,06) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,07) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=RADIO-CARRIER(02) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSE(f0) INST=(00,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-CELL(f1) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSVC(f2) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSVC(f2) INST=(00,01,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Software Activated Report <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Off line(03) <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Sending OPSTART <0005> abis_nm.c:419 OC=BTS(01) INST=(00,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=GPRS-NSE(f0) INST=(00,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Enabled <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Sending OPSTART <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) OPSTART NACK CAUSE=Message cannot be performed <0005> bsc_init.c:54 Got a NACK going to drop the OML links. <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=BTS(01) INST=(00,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,00) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,01) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,02) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,03) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,04) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,05) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,06) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=CHANNEL(03) INST=(00,00,07) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=RADIO-CARRIER(02) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSE(f0) INST=(00,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-CELL(f1) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSVC(f2) INST=(00,00,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=GPRS-NSVC(f2) INST=(00,01,ff) STATE CHG: OP_STATE=Disabled AVAIL=Not installed(07) <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Software Activated Report <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Disabled AVAIL=Off line(03) <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Sending OPSTART <0005> abis_nm.c:419 OC=BTS(01) INST=(00,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=GPRS-NSE(f0) INST=(00,ff,ff) SW Activate Request: <0005> abis_nm.c:418 Software Activate Request, ACKing and Activating <0005> abis_nm.c:439 Found SW config: 42 12 00 08 31 31 39 61 30 30 32 00 13 00 0a 76 31 32 37 62 31 34 64 30 00 <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) STATE CHG: OP_STATE=Enabled <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) Sending OPSTART <0005> abis_nm.c:419 OC=SITE-MANAGER(00) INST=(ff,ff,ff) OPSTART NACK CAUSE=Message cannot be performed <0005> bsc_init.c:54 Got a NACK going to drop the OML links. And the config file: cat openbsc.cfg ! ! OpenBSC configuration saved from vty ! ! password foo ! line vty no login ! e1_input e1_line 0 driver ipa network network country code 1 mobile network code 1 short name OpenBSC long name OpenBSC auth policy closed location updating reject cause 13 encryption a5 0 neci 1 rrlp mode none mm info 1 handover 0 handover window rxlev averaging 10 handover window rxqual averaging 1 handover window rxlev neighbor averaging 10 handover power budget interval 6 handover power budget hysteresis 3 handover maximum distance 9999 timer t3101 10 timer t3103 0 timer t3105 0 timer t3107 0 timer t3109 0 timer t3111 0 timer t3113 60 timer t3115 0 timer t3117 0 timer t3119 0 timer t3141 0 bts 0 type nanobts band DCS1800 cell_identity 0 location_area_code 1 training_sequence_code 7 base_station_id_code 63 ms max power 15 cell reselection hysteresis 4 rxlev access min 0 channel allocator ascending rach tx integer 9 rach max transmission 7 ip.access unit_id 1801 0 oml ip.access stream_id 255 line 0 gprs mode none trx 0 rf_locked 0 arfcn 514 nominal power 23 max_power_red 20 rsl e1 tei 0 timeslot 0 phys_chan_config CCCH+SDCCH4 timeslot 1 phys_chan_config SDCCH8 timeslot 2 phys_chan_config TCH/F timeslot 3 phys_chan_config TCH/F timeslot 4 phys_chan_config TCH/F timeslot 5 phys_chan_config TCH/F timeslot 6 phys_chan_config TCH/F timeslot 7 phys_chan_config TCH/F Thanks in advance. -- Dee