At Skyfence Technologies, we often assist clients facing issues with VoIP systems — poor audio, dropped calls, or trouble registering phones. One common cause of these problems is a router setting called SIP ALG (Session Initiation Protocol Application Layer Gateway).

What Is SIP ALG?

SIP ALG is a feature on many routers that tries to help VoIP traffic pass through NAT (Network Address Translation) by rewriting packet headers. While this might sound helpful, it often causes more harm than good — especially with modern VoIP systems.

Common Problems Caused by SIP ALG:

• One-way or no audio during calls

• Inability to receive or make calls

• Frequent call drops

• Registration failures with VoIP providers

Our Recommendation

Turn SIP ALG OFF on your router to ensure smooth and reliable VoIP service. This simple change can drastically improve performance and eliminate many frustrating problems.

If you're unsure how to disable SIP ALG on your router, Skyfence Technologies is here to help. We offer expert VoIP support, router configuration, and full system optimization to ensure your communication setup runs smoothly and securely.

Need Help with VoIP Setup or Troubleshooting?

📞 Contact us today at +27 67 072 8838
🌐 Visit: www.skyfencetechnologies.co.za
📧 Email: info@skyfencetechnologies.co.za

Your network should just work. Let us make sure it does.