SIP Trunking (Burstable · Multi-Site Shared)
Cox Business SIP Trunking provides PSTN connectivity for IP PBX and UCaaS systems — with burstable capacity that allows usage to exceed provisioned channels during peak periods, billing only for actual burst usage rather than maximum theoretical capacity. Multi-site shared trunking pools call capacity across multiple business locations under one trunk group, reducing total channel provisioning. Includes number porting, E911, and direct connectivity to Cox
Free Advisory
Fibi sources Cox SIP Trunking (Burstable · Multi-Site Shared) at no cost to you. Our advisory is funded by the carrier.
Side-by-Side Comparison
We compare Cox against 300+ carriers so you know you're getting the best solution for your needs.
Post-Sale Support
Dedicated advisor for the life of your contract — Fibi escalates issues on your behalf so you're never dealing with carrier support alone.
More from Cox
Related Services
Business Internet (DOCSIS 3.1, up to 1 Gbps)
Cox Business Internet is delivered over Cox
Optical Internet / Dedicated Fiber (up to 100 Gbps)
Cox Optical Internet delivers fully symmetric dedicated fiber connectivity — equal upload and download speeds from 10 Mbps to 100 Gbps on Cox
VoiceManager Unlimited (UCaaS)
VoiceManager Unlimited is Cox
Managed WiFi & Managed Router
Cox Business Managed WiFi provides enterprise-grade wireless coverage for commercial spaces — with access point deployment, configuration, monitoring, and troubleshooting handled by Cox rather than internal IT staff. Managed Router provides fully managed edge routing, with Cox responsible for hardware, firmware, configuration, and ongoing support. Both services reduce the internal IT burden of managing network infrastructure, particularly for multi-location retail, hospitality, and healthcare organizations without dedicated network teams at each site.