SIP What is SIP? SIP stands for Session Initiation Protocol. Related Posts:How to troubleshoot common SIP problems?Is SIP the Same as VoIP? Debunking the ConfusionNavigating the Future of Business Communications:…Related Articles: VoIP Industry to grow to $76.1 billion in 2015Microsoft Skype for Business SIP TrunkspricingSIPTrunk ProviderConfigure Free Switch with DID For Sale« Back to Glossary Index