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Settings – Public switched tel. networks
Voice over IP (VoIP)
You should only switch off the registrar if the VoIP provider requires you
to do so. No NAT Keep-Alive is performed if the registrar is disabled. An
internal network is usually protected from external manipulation by, for
example, a firewall integrated in the router. Without NAT Keep-Alive, the
firewall's security functions will defend you against attempted accesses
from the Internet. For this reason, you may need to implement port
forwarding for incoming SIP packets on the SIP port set up in the VoIP
provider's configuration.
Caution: Each time a port is opened on the router, this
creates a potential source of danger.
Time limit for registration (1 to 60 min.)
The registration time specifies how many minutes the PBX waits before
reregistering itself with the VoIP provider.
Note: In the test phase, after configuring the VoIP provider, we
recommend you enter a low value (e.g. three minutes). After completing
the test phase, you can enter a much higher value, since some VoIP
providers also reject calls if too many attempts are made to register.
SIP registration in accordance with RFC 6140
The PBX complies with the SIPconnect 1.1 SIP protocol.
490
• It is essential you put additional protective measures in
place.
COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
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