https://devzone.nordicsemi.com/f/nordic-q-a/93684/xepco-configuration-with-nb-iot-and-lte-m-enabled-mfw1-3-xWe are migrating from Modem firmware version 1.2.x to 1.3.x. Since it is now possible to enable LTE and NBIOT both using the following XSYSTEMMODE configuraton: How does this affect other configuration? Especially PCO configuration, should PCO been-USTelligent Community 13Wed, 09 Nov 2022 09:37:57 GMThttps://devzone.nordicsemi.com/thread/394854?ContentTypeID=1Wed, 09 Nov 2022 09:37:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:523459e2-79b1-4006-98b7-7d264a4202bd&#216;yvind<p>This is difficult to tell. It might be easier to use legacy PCO however I&#39;m not certain what features are not included.&nbsp;</p> <blockquote> <p>The 3GPP standard (standard specification for mobile networks globally) specifies that NB-IoT networks support ePCO (extended protocol configuration options).</p> <p>Many networks globally instead offer PCO. When a device attempts to connect expecting ePCO, it will not be able to get online. The two messages are different, so the device and the network don’t understand each other properly.</p> <p>(<a href="https://www.digitalmatter.com/nb-iot-update-pco-support/">https://www.digitalmatter.com/nb-iot-update-pco-support/</a>)</p> </blockquote> <p>You can find more information on ePCO from the <a href="https://www.etsi.org/deliver/etsi_ts/129200_129299/129274/13.09.00_60/ts_129274v130900p.pdf">technical specification&nbsp;3GPP TS 29.274 version 13.9.0 Release 13</a>.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/394841?ContentTypeID=1Wed, 09 Nov 2022 08:32:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e45f49c7-1079-4cbd-bc7e-761864aed924Umer Mahmood<p>Hello!&nbsp;<br />Thank you for your quick reply. I understand that some networks might not support ePCO, but can I assume all&nbsp;networks support atleast lagacy pco?&nbsp;<br />What I am really trying to understand from the point of view of application development, is, do I need to implement a mechanisim to toggle between lagacy and ePCO every now and then using the relevant at command, whenever my device fails to connect to the network?&nbsp;<br />Or should I simply use lagacy PCO and not worry about anything? Because from what I understand, for example just in Europe, I cannot be sure if all the networks my device will try to connect to, home network or when roaming, support ePCO or not.&nbsp;The goal is that the device should be able to make a connection successfully,&nbsp;not just in&nbsp;Europe but in USA/Canada and Asia as well.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/394832?ContentTypeID=1Wed, 09 Nov 2022 07:28:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62bdc5bf-7e32-48ea-9f81-27612b40576b&#216;yvind<p>Hello,&nbsp;<br /><br />This depends on the network.&nbsp;<span>If you are connecting over NB-IoT and your operator does not support extended Protocol Configuration Options (e</span><span>PCO</span><span>), select the option which enabled legacy Protocol Configuration Options (PCO) mode, i.e.&nbsp;</span><code>AT%XEPCO=0</code></p> <p><code></code>You can also set this in the application configuration (prj.conf) with <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#CONFIG_PDN_LEGACY_PCO">CONFIG_PDN_LEGACY_PCO</a>.</p> <p>Kind regards,<br />Øyvind</p><div style="clear:both;"></div>