SIP
To help SIP trunking buyers Nemertes has created a check-list of key product differentiators to look at when evaluating SIP trunking service offerings. These include:
· Size of markets targeted
· Verticals targeted
· Value added features (virtual numbers, 800 call routing, contact center support, etc.)
· Geographies served
· Key partners
· Service types
· Cost
· SIPconnect certification
· VOIP system support
· Security guarantees
· Performance guarantees
· Spam over Internet Telephony (SPIT) protection
Among SIP trunking providers we’ve found that the primary differentiators include service availability, bundled features, service level guarantees, and SIPconnect certification.




