What is the Difference between Call Filter and Data Filter?

Hello,

I have confused between Call Filter and Data Filter in Vigor Draytek configuration.

I search officially document and googled relatively link. Finally I see what I need in i-helpdesk.com.au

Now I show you that hope it can help reduce your time. Hope you see this post in the top result of google :))

IP filter architecture categorizes traffic into two types: Call Filter and Data Filter. This is based on whether the Internet connection is up or down (WAN link status is up or down).

Call Filter – applies when there is no existing Internet connection.The Call Filter is applied to all outgoing traffic. It will check packets according to the filter rules. If legal, the packet will be allowed to pass. Then the router shall “initiate a call” to start the Internet connection and send the packet out to Internet.

Data Filter – applies when there is an existing Internet connection. The Data Filter is applied to incoming and outgoing traffic. It will check packets according to the filter rules. If legal, the packet will be allowed to pass through the router.

The following illustrations are flow charts explaining how router will treat incoming traffic and outgoing traffic respectively.

 

Thank you :)

Source:  http://www.i-helpdesk.com.au/index.php?/Knowledgebase/Article/View/277/0/what-is-the-difference-between-call-filter-and-data-filter

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