⚙️ SIP Trunking & Configuration
Technical guides for SIP trunk setup, SIP ALG troubleshooting, codec configuration and firewall settings for VoIP.
What Is SIP Trunking? A Complete Business Guide
Everything you need to know about SIP trunking — what it is, how it works, and why businesses use SIP trunks for their phone systems.
Read article →What Is SIP ALG and Why You Should Disable It
SIP ALG causes most VoIP problems on business routers. Learn what it is, why it breaks VoIP, and how to disable it on common routers.
Read article →Firewall and Network Configuration for SIP Trunks
How to configure your firewall and network for SIP trunks — ports, protocols, NAT traversal and QoS settings for reliable VoIP.
Read article →VoIP Audio Codecs Explained: G.711, G.722 and Opus
Understanding VoIP audio codecs — which codecs to use for the best call quality and bandwidth efficiency on your SIP trunks.
Read article →SIP Registration and Authentication: How It Works
How SIP registration and authentication works for VoIP phones and trunks, and how to troubleshoot registration failures.
Read article →What Is SIP? Session Initiation Protocol Explained
SIP (Session Initiation Protocol) is the technology behind VoIP calls. Here is what it does.
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