MERA VoIP Transit Softswitch (MVTS) is a carrier-grade softswitch with the gatekeeper and proxy functionality that dramatically simplifies VoIP peering on small and medium-grade networks (up to 5 mln minutes per month). MVTS is a non-vendor-specific single platform solution with simple static routing and network protection capabilities. MVTS intrinsic border control mechanisms provide a single entry point into carrier's VoIP infrastructure to enable centralized authentication and billing by third-party billing systems, facilitate interconnection with peering partners and enhance network security.