Call One is a privately-held CLEC offering IP/Hosted Voice, UCaaS, Internet, WAN & business continuity products for mid-market firms, located in Chicago, IL. Working with over 60 leading carriers, their core network points overlap very well with the Sandler Partners footprint with IL, TX, and CA. Their direct relationship with leading device manufacturers grants the ability to provide customers with optimal pricing efforts, surrounded by the best possible service and support. Call One boasts a 97% retention rate since company inception in 1992, for which they credit their overall customer experience coupled with low-costs. Their average customers are mid-sized, multi-location businesses combining SIP/PRI, MPLS/VPLS, SD-WAN, and Internet.