WELLTECH ATA-171 - V1.4 User Manual page 16

3.5.5 DDNS Setting: You can configure the DDNS setting in this page. You need to have the DDNS
account and input the informations properly. You can have a DDNS account with a public IP
address then others can call you via the DDNS account. But now most of the VoIP
applications are work with a SIP Proxy Server. When you finished the setting, please click the
Submit button. If there is nothing need to change, please click the Save Change Item in the
left side, then click the Save button. The change you made will save into the system and the
system will Reboot automatically.
3.5.6 VLAN Setting: You can set the VLAN setting in this page. There are two parts in this page.
First one is to set the packets related to the TA, and the second parts is if you use the VLAN
setting in the NAT Mode.
-1- There are two kind of destination packets will come from the TA's WAN port, one kind of
packets will go to the TA, the other will go through the LAN port to the PC.
-2- VLAN Packets: if you enable the first VLAN Packets and set the VID, User Priority, and
CFI, then all the incoming packets will be check with the IP Address and the VID.
-3- VID: You can follow your service provider to set your VID.
-4- User Priority: Defines user priority, giving eight (2^3) priority levels. IEEE 802.1P defines
the operation for these 3 user priority bits. Usually this will be defined by your service
provider.
-5- CFI: Canonical Format Indicator is always set to zero for Ethernet switches. CFI is used
for compatibility reason between Ethernet type network and Token Ring type network. If a
frame received at an Ethernet port has a CFI set to 1, then that frame should not be
forwarded as it is to an untagged port.
-6- When you enable the first VLAN Packets and set the VID, User Priority, and CFI, then all
the incoming packets with the TA's IP address and the same VID will be accept by the TA.
If the incoming packets with the TA's IP address but the different VID then the packets will
be discard by the TA. The Other incoming packets with different IP address will go through
the LAN port to the PC.
-7- NAT VLAN Setting: When you set your device in NAT mode, the TA can help you to filter
the wrong incoming packets. You can separate the other device connectd behind the TA
into 4 VLAN group. You can set different VID for these 4 groups. When the incoming
packets go through the TA's WAN port then the TA will check the VID, if the packets is not
ATA-171/172/171P (ATA-S1/S2/P)
Figure 16. DDNS Setting
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User's Guide