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Technical Benefits Granite Business SIP Trunking uses Voice over Internet Protocol (VoIP) and a state-of-the-art voice-optimized network. - IP Business Trunking is available as digital trunks or as emulated (Analog Handoff) PRI lines. - Granite SIP Trunking is compatible with existing analog phones, key systems, legacy enabled PBX’s, and with select IP PBX equipment. - SIP helps save money compared to current local, long-distance and Internet service rates. - Testing available prior to deployment/installation. Capabilities With Granite SIP Trunking your business receives a cost-effective converged, nationwide service with a scalable capacity that increases productivity and smoothly integrates with your IP communications network. - Network Diversity - Disaster Recovery - Free Interoperability Testing Prior To Deployment - Individual & Bulk DID Fail Over Capabilities - Public/Private IP Address - Fraud Prevention