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Pau Espin Pedrol pespin at sysmocom.deHi, the problem is not in osmo-bts-trx <-> osmo-trx, that's working fine so far on your setup (sending a POWEROFF at startup is fine since then it makes sure the osmo-trx is powered off before configuring it and finally running POWERON on it). It won't be configured until the BSC (in your case osmo-nitb) instructs osmo-bts-trx on how to do it through Abis OML connection. The problem is here: On 5/9/20 3:15 AM, cruise wrote: > *_/About one minutes later, the osmo-bts-trx will exit automatically, > and the following messages was printed./_* > > <0012> e1_input.c:243 abis_sendmsg: msg->dst == NULL: 0c 12 01 90 0f 00 c8 > <0012> e1_input.c:243 abis_sendmsg: msg->dst == NULL: 0c 12 01 88 12 06 > 00 00 00 00 00 00 > <000d> abis.c:143 Signalling link down > <0001> bts.c:293 Shutting down BTS 0, Reason Abis close > Shutdown timer expired The Abis connection, be it OML or RSL, between the BTS and the BSC (in your case osmo-nitb) fails at some point. Unfortunately unless you provide config files, complete logs and pcap files it's difficult to tell you more. Please next time provide those while reporting. > > *3. osmo-nitb* FYI, osmo-ntib is deprecated and not maintained since years ago. Please better use new software stack: https://osmocom.org/projects/cellular-infrastructure/wiki -- - Pau Espin Pedrol <pespin at sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte