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TD-W8980 N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide
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• H323 ALG: To allow H323 clients and servers to transfer data across NAT, click
Enable.
• SIP ALG: To allow SIP clients and servers to transfer data across NAT, click Enable.
Click the Save button to save your settings.
4.5.7 DSL Settings
Choose “Advanced Setup”Æ“DSL Settings”, you can select the DSL Modulation Type and
Annex Type in the next screen. The DSL feature can be selected when you meet the physical
connection problem. Please check the proper settings with your Internet service provider.
Figure 4-20
¾ DSL Modulation Type: Select the DSL operation Modulation Type which your DSL
connection uses.
¾ Annex Type: Select the DSL operation Annex Type which your DSL connection uses.
Click the Save button to save your settings.
4.5.8 IPSec VPN
Choose “Network”Æ“IPSec VPN”, you can Add/Remove or Enable/Disable the IPSec tunnel
connections on the screen as shown in Figure 4-21.
Figure 4-21
This section will guide you to configure a VPN tunnel between two TD-W8980s. The topology is as
follows.