Gartner's Magic Quadrant for North American managed and professional network service (MPNS) vendors is a guide for midsize businesses and large companies to identify and evaluate vendors that deliver IT services in support of connectivity and communications infrastructure (for example, Internet Protocol [IP] telephony hardware and software). All the vendors in this Magic Quadrant provide network IT services, but their competencies and offerings vary. Base your selection on a detailed evaluation of your communications requirements and sourcing goals against a vendor's capability to execute against those expectations.