System Parameter - Planet Networking & Communication VGW 20FS Series User Manual

4-/8-/16-/24-/32-Port SIP Internet Telephony Gateway

System Parameter

3.8.7
System parameters include: STUN, NTP, Provision, EB parameter and Telnet.
1） STUN: STUN （Simple Traversal of UDP over NATs） is a lightweight protocol that allows applications to discover
the presence and types of NATs and firewalls between them and the public Internet. It also provides the ability
for applications to determine the IP addresses allocated to them by the NAT. STUN works with many existing
NATs, and does not require any special behavior from them. STUN doesn't support TCP connection and
H.323.
2）NTP: Network Time Protocol (NTP）is a computer time synchronization protocol.
3）Provision: Provision is used to make the gateway automatically upgrade with the latest firmware stored on an
http server an ftp server or a tftp server.
Figure 3.10-7 Configuration Interface for System Parameters
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