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What is SIP ALG and why do we recommend that I turn it off?

When discussing VoIP problems with our support team we may ask you whether SIP ALG is enabled on your router. This article intends to explain what it is, how it can affect VoIP and why we recommend you turn it off. What is SIP ALG? SIP ALG stands for Application Layer Gateway, and is common in many commercial routers. It intends to prevent some of the problems caused by router firewalls by inspe...
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