COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
491
Settings – Public switched tel. networks
Voice over IP (VoIP)
NAT traversal
NAT (Network Address Translation) enables you to convert a particular IP
address that is used within a network (e.g. a local network) into a different
IP address that can be used by a different network (e.g. the public switched
phone network). If NAT traversal is switched on, and a query is sent from a
local IP address to the public network, the sending IP address is swapped
with the public IP address. This function is performed in the reverse direction
for the reply.
Disabled
NAT traversal is not performed by the PBX. The router which connects the
local area network with the Internet should be a properly functioning, SIP-
aware router which performs NAT traversal.
Enabled with use of STUN
NAT traversal is performed by the PBX. To achieve this, a STUN server
must also be specified for the VoIP provider.
Enabled
NAT traversal is performed by the PBX. To achieve this, the registrar for the
VoIP provider must be switched on. The SIP request also contains an "rport"
part in which the IP addresses used here (local, public) are transported.
Notes:
If
Enabled
is selected: If problems occur with single-sided call connec-
tions, use
Enabled with use of STUN
instead.
