Hello every, I recently set up the equipment and tried to communicate with the public PLMN and it worked well at that stage. Then I tried to camp on the OpenBTS after switching on the SIM card. When it progressed to location updating request step, the OpenBTS can not receive identity response from MS. The timer t3210 was fired as long as passing a certain period of time and location updating request was sending again iteratively. Anyway location updating was failed. I checked through wireshark from the mobile phone side, showing that MS did send the response however OpenBTS did not receive somehow. Also the timing advance (ta) during that process became 127 which was abnormal, out of the maximum value of 63. I suspected it was also caused by the failure of reception. Is there something wrong about the decoding at OpenBTS side or data packing error at MS side? Is there any way to fix it? Many thanks, Li ------------------------------------------------------------------------ If you reply to this email, your message will be added to the discussion below: http://baseband-devel.722152.n3.nabble.com/interact-osmocombb-with-OpenBTS-… To start a new topic under baseband-devel, email ml-node+722152-1468632564-419596(a)n3.nabble.com To unsubscribe from baseband-devel, click here <http://baseband-devel.722152.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=722152&code=bWFya3VzLm1hbm5pbmdlckBzdHVkZW50LnR1Z3Jhei5hdHw3MjIxNTJ8MTIyNDUzMjA5MQ==>.