How to Solve SIP ALG Problems in 2026: A Practical VoIP Guide for SMBs and MSPs
If your VoIP phones are dropping calls, registering intermittently, or producing one-way audio, you’re likely facing one of the most common — and misunderstood — network issues of 2026: SIP ALG problems. Session Initiation Protocol Application Layer Gateway (SIP ALG) was originally designed to simplify SIP traffic through NAT. But as modern VoIP systems moved to encrypted signaling (TLS) and SRTP media, SIP ALG started doing more harm than good.
