Introduction

  • VoLTE (Voice over LTE) is a voice call technology that works only in a 4G networks. 
  • The data voice is transmitted through data network (not GSM as 2G/3G). 
  • To use VoLTE the SIM provider must be enable this service. 
  • VoLTE calls are charged as voice calls, not data. 
  • The devices that don’t have VoLTE service (due to coverage / SIM authorization / Other problems) will use fallback to 2G/3G for voice through GSM and return to 4G for GPRS data. 
  • The APN and its authentication settings must be configured correctly. 
  • Roaming or international SIM's will likely not have access to VoLTE. Please check the availability with your SIM provider. 


Configure the DCP for VoLTE calls 

  1. Set the APN with P060. 
  2. Set your USER if is required with P061. 
  3. Set your PASS if is required with P062. 


These parameters are provided by the mobile network operator of your SIM card. 

How to check if it works correctly 

  • Configure the DCP to 4G only GSM mode using the SMS command: Pin1234,P094N281. This command forces the DCP to only use the 4G network. Try to send and receive a call. If doesn’t work revise the configuration and mobile services. 
  • After this configure P094 with P094N251 for return to automatic mode (is the default mode with 2G/3G/4G). 
  • Only do this if you have your DCP in front you because if your zone/MNO don’t have 4G is possible lost the connection. The version 1.60L will have an improvement for this.