NB-IoT Uplink

If I am using Uplink messages only, it is safe to disable eDRX? I only need to wait for the server to acknowledge my message after sending a message.

Moreover, how can downlink messages be used in NB-IoT with CoAP protocol? How can the Server push a message to the device?

submitted by /u/redbagy
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Original article: NB-IoT Uplink
Author: /u/redbagy