Enterprise SIP Trunking, PSTN, Numbering and 911 Services

The government authority in Stamford, CT requires a vendor to provide enterprise-grade Session Initiation Protocol (SIP) trunking, Public Switched Telephone Network (PSTN) connectivity, telephone numbering, and 911 services. The selected vendor must deliver base services including inbound and outbound calling, DID number management, E911 provisioning, caller ID administration, fraud controls, call logs, 24/7 technical support, and project management for implementation and porting. The buyer also accepts optional services such as cloud-hosted SBC, Microsoft Teams Direct Routing, contact-center carrier services, Fax-over-IP, messaging campaigns, robocall mitigation, disaster recovery routing, and professional configuration services. Only US organizations are eligible to bid for this opportunity. The buyer permits onsite or offsite performance and accepts digital proposal submissions via email or online. The authority seeks proposals for a three-year contract period. Bidders must submit all questions no later than September 24, 2026.