https://devzone.nordicsemi.com/f/nordic-q-a/120204/connection-to-r-s-cmw500-using-at-command-onlyOur device is set up to provide AT Commands directly to nRF9160 using a USB UART connection and control using a VT100 Terminal simulator. When attempting to connect to the R&amp;S CMW500 Call Box, our device sees the Call Box, but there is no connection establisheden-USTelligent Community 13Fri, 28 Mar 2025 07:54:03 GMThttps://devzone.nordicsemi.com/thread/529447?ContentTypeID=1Fri, 28 Mar 2025 07:54:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8209b8c0-cd98-40da-b5af-ed20bd0c1318Charlie<p>Hi Jeff,</p> <p>Thanks for reaching out for your questions.</p> <p>For the <a href="https://docs.nordicsemi.com/bundle/ref_at_commands/page/REF/at_commands/nw_service/cops_test.html">AT+COP=?</a> command result, do you know which one is your CMW500? It shows several LTE-M network avaliable, make sure you have enabled <span>LTE_M_support with&nbsp;<a href="https://docs.nordicsemi.com/bundle/ref_at_commands/page/REF/at_commands/mob_termination_ctrl_status/xsystemmode.html">System mode %XSYSTEMMODE</a>.</span></p> <p>Could you explain more about your &quot;<span>golden sample using nRF9160</span>&quot;? Is this an nRF9160DK? How have you make it connect to CMW500?&nbsp;Any logs would be appariacatied.</p> <p>Best regards,</p> <p>Charlie</p><div style="clear:both;"></div>