TP Link WR840N - Switching off SIP ALG


Please note: this guide is for the Archer WR840N hardware version 1,2,3,4,5 router.
The later hardware versions of this router have a different colour scheme but the below guide follows the same steps

This guide will walk you through switching off SIP ALG on your TP Link router.
SIP ALG is known to cause a number of issues with Cool Ideas VoIP and switching it off is always recommended.

  1. Open your web browser and navigate to or

  2. You will be greeted by the page below:

  3. Enter the following:

    Username: admin
    Password: admin or coolideas1

  4. The following status page will appear once you have logged in.

  5. Navigate to Security > Basic Security on the left-hand menu.
  6. Select Disable in line with SIP ALG.

  7. Click on Save.

Your router now has SIP ALG disabled.

If you have any trouble with the above, please don't hesitate to contact our support team on 010-593-2665 or via mail

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