How to Disable SIP ALG on TP-Link xDSL modem router

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Recent updates may have expanded access to feature(s) discussed in this FAQ. Visit your product's support page, select the correct hardware version for your device, and check either the Datasheet or the firmware section for the latest improvements added to your product. Please note that product availability varies by region, and certain models may not be available in your region.
For the VOIP application, sometimes the ISP will ask you to disable SIP ALG on your modem router. Please refer to the following steps to do the configuration.
Step 1 Refer to the link below to log in to the web management interface.
How to log into the web-based interface of the AC VDSL/ADSL Modem Router
Step 2 Go to Advanced > NAT Forwarding > ALG to turn off SIP ALG.
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