Auerswald COMpact 5200 Advanced Information page 628

SIP
Note: If Enabled is selected: If problems occur with single-sided call
connections, use Enabled with use of STUN instead.
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.
utilisier l'adresse IP publique statique
Requirements:
• Registered fixed IP address (see Settings)
NAT traversal is performed by the PBX. The VoIP provider requires a
connection via a static public IP address.
If the VoIP provider still requires this static IP address in a header, select
the appropriate option:
• Use static public ID address in VIA Header
utiliser l'adresse IP publique dans le Contact Header
•
Interval for NAT Keep-Alive enabled
After the time specified here has passed, NAT Keep-Alive packets are
sent to the Firewall to maintain the NAT mapping.
Note: Some VoIP providers block accounts if the Interval for NAT
Keep-Alive is too short. As a rule, this is reported with error message 503
during SIP registration. If you encounter this problem, we recommend you
set a higher value (e.g. 180).
Proxy sortant
COMpact 5200/5200R/5500R - Firmware V7.4A - Advanced Information V08 06/2019
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