AVT MAGIC AC1 Go Configuration Manual page 78

▪ STUN SERVER PARAMETERS: The use of a STUN
server may be required by the AoIP/SIP provider.
Only one STUN server is required, even if the
device connects to multiple providers. Enable
STUN for each SIP server individually on the LINE
INTERFACE configuration page in AoIP/SIP mode.
STUN SERVER: IP address or host name of the STUN
▪
server.
▪ NAT KEEP ALIVE MESSAGE TIME: Set the time
interval at which the device periodically sends
keep-alive packets to the SIP server. This allows
routers and firewalls to keep the SIP
communication ports open. This allows the SIP
server to inform the unit of incoming calls. Keep
alive packets are only sent if STUN is enabled for
the respective SIP account. (Default: 20 seconds)
LAN Interface (3)
▪ LINK TYPE: Set how the unit's Ethernet
connection to the network switch is established.
AUTO: The device automatically detects the link
▪
type. The System Monitor should display the status
of the LAN interface at 100 Mbps, full.
TYPE 1/2: If the status of the LAN interface in the
▪
System Monitor is not 100 Mbps, full, even though
the switch supports this mode, test whether Type 1
or Type 2 solves the problem.
▪ DISABLE INSUFFICIENT LAN ALARM: For audio
transmission, the LAN interface should be operated
in 100 Mbps, full mode to prevent audio
interference. Therefore, the unit raises the
Insufficient LAN alarm if this mode is not
established.