DAG1000/2000 Series FXS Voice Gateway User Manual
37
Note
：
* private services are open by default
4.8.7 System Parameter
System parameters include: STUN
、
NTP
、
Provision
、
WEB parameter
、
Telnet.
1
）
STUN
：
STUN
（
Simple Traversal of UDP over NATs
）
is a network protocol. It allows users back
of NAT find their own public network address, NAT type and internet end port have been bound
by NAT for a local port. Two back of NAT router devices established UDP communication
through this information.
STUN doesn’t support TCP connection and H.323.
2
）
NTP
：
Network Time Protocol
（
NTP
）
is a computer time synchronization protocol.
3
）
Provision
：
Auto Provisioning can be used to provide general and specific configuration
parameters ("Settings") to the DAGs and to manage firmware actualization.
System parameter configuration interface as follow:
Figure 4.8-11System Configuration Interface
