I would like to use this module for a VoLTE/VoWifi/GSM - SIP gateway/LTE router. I found this line in the specification:
“Digital Audio and VoLTE (Voice over LTE)(Optional)”
Could you please tell me what does this mean?
I would like to use it in Hungary (DIGI provider) with a Raspberry Pi (Zero, 3, 4,…). Have someone any experience with this setup?
Thank you in advance!