NexVortex offers high-quality, high-touch SIP trunking for VoIP systems and videoconferencing systems.  They have superior service plans, superior redundancy and automatic disaster recovery programs.  If you’re looking for very cost-effective SIP connections, service to formerly hard-to-reach sites, and guaranteed disaster recovery service, NexVortex is a good choice.  They pair well with Mitel VoIP systems.