Please note: this guide is for the Archer C5 hardware version 4 router.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.
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Open your web browser and navigate to 192.168.0.1 or http://tplinkwifi.net/
- You will be greeted by the page below:
- Enter the following and Log in:
Username: admin
Password: admin or coolideas1
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The following status page will appear once you have logged in.
- Select the Advanced tab.
- Navigate to NAT Forwarding > ALG on the left-hand menu.
- Untick the Enable box in line with with SIP ALG.
- 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