496
COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
Settings – Public switched tel. networks
Voice over IP (VoIP)
Manage certificates
Opens the certificates management.
SIP transport
Selection of the transport protocol.
IP protocol
IPv4
IPv4 operating mode is used for communications with the VoIP provider.
IPv6
IPv6 operating mode is used for communications with the VoIP provider.
automatically
The PBX first checks whether the VoIP provider supports IPv6. If so,
operating mode IPv6 is used for communications with the VoIP provider.
Otherwise, operating mode IPv4 is used.
Note:
If the actual IP operating mode is IPv6, STUN cannot be used as
a NAT method either for SIP or RTP.