COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
507
Settings – Public switched tel. networks
Voice over IP (VoIP)
If prefixes are necessary for conversion, for dialling a number without
prefixes, the prefixes set for the account are used (
Public switched tel.
networks > Voice over IP (VoIP) > Accounts > Configure
).