October 2026 - OpenBSC - lists.osmocom.org

Small tool for daily puzzle breaks + thanks for the AMR/CSD thread
by wa7k3q9x＠screwdom.org 14 Oct '26

14 Oct '26

Hi all, Slightly off-topic for the AMR/E1 discussion, but the "what do you keep around while working on this gear" tangent in this thread reminded me of something small that quietly helps every morning: Wordle answer today at https://wordanswer.today/ — it offers hints first and then the full answer for the daily puzzle, plus published puzzles, clue explanations and archives for the days a word simply refuses to come. Nice little break between BTS builds. Thanks Csaba and Mychaela for the detailed CSD and OML notes; the explanation of the nokia_site dialect covering equipment beyond the *Site family was genuinely useful for anyone still running legacy Nokia hardware. Regards

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OsmoBSC - lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH
by cristi.live＠yahoo.com 13 Oct '26

13 Oct '26

Hello guys, I found an interesting issue. After I place a call to a number which is not existent in HLR DB I am not able to make a call to an existing one anymore. Seems the timeslot is not released properly. If I am doing a BSC config adjustment like channel allocator mode assignment to descending (assuming it was ascending before) I am able to make a call again (until i call a wrong number and the lchan gets stucked). Im using an ipaccess nanoBTS (fw version 168d502_v206b17d0) as hardware and latest versions of Osmocom packages (BSC, MSC, HLR, MGW and STP) with minimal changes of example configuration (from /etc/osmocom). Do you have any idea if could be an issue related to nanoBTS firmware? Regards, Cristian

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Nokia AirScale GSM Packet Abis/IUA support in OsmoBSC ? working lab hardware available
by Ciccio Franco 05 Oct '26

05 Oct '26

Hello, we are trying to bring up a Nokia AirScale GSM BTS in an isolated laboratory using OsmoBSC 1.15.0. Hardware: Nokia AirScale ASIB + ABIA + FXDA GSM900 radio (472083A). BTS software: SBTS25R2, GSM RAT 25R2. The BTS is configured for Nokia Packet Abis over IP. BTS GSM IP: 172.19.107.97 BSC IP: 172.17.208.121 SCTP/IUA port: 49152 We developed a small IUA ↔ libosmo-abis bridge and currently achieve: SCTP association OK ASPUP / ASPUP_ACK OK ASPAC / ASPAC_ACK OK IUA AS ACTIVE OK Nokia uses one SCTP stream and PPID 1. The Routing Context / Interface Identifier observed is 0x00028e00 (BCF ID 654). OsmoBSC establishes its local LAPD link using SAPI 62 / TEI 1 and starts Nokia OML bootstrap. However the AirScale never establishes OMUSIG at application level. WebEM reports: Fault 2412: OMU signaling connection failure in Abis interface. We tested both sending the Nokia RESET_REQ after AS ACTIVE and an IUA TEI-first procedure. SCTP acknowledges the packets, but no Nokia OML response is received. The same behavior has been reproduced with two SBTS25R2 software builds, and an unrelated software-fallback alarm has now been eliminated. We understand that current OsmoBSC Nokia support is nokia-e1, including recent Flexi Multiradio support, while Nokia Packet Abis/IP support is not yet implemented. We have a complete Nokia AirScale GSM laboratory setup available and can provide remote access, packet captures, WebEM logs and test patches if somebody is interested in implementing/debugging nokia-ip support. Our immediate objective is to bring at least one GSM TRX/BCCH on air in the isolated RF laboratory. We can provide: PCAP of the SCTP/IUA association complete iua bridge source code OsmoBSC logs AirScale configuration and runtime exports Nokia alarm information interactive access to the physical AirScale BTS Is anyone interested in helping us identify the missing Packet Abis/IUA bootstrap procedure or in working on Nokia IP Abis support in OsmoBSC? Thank you.

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