COMpact 5200/5200R/5500R - Firmware V7.2 - Advanced Information V04 07/2018
505
Settings – Réseaux publics
Voix sur IP (VoIP)
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.
Signalisation DTMF
Requirements:
•
Inband signalling: uncompressed codec (G.711)
Caution:
Each time a port is opened on the NAT router, this
creates a potential source of danger.
•
It is essential you put additional protective measures in
place.
