CINTWR is an privately held company that provides VoIP Telephony and IT Services for small to medium business. We are a: – Certified Reseller, Installer, and Support Provider for Grandstream Enterprise Phone Systems – Session Initiation Protocol (SIP) Trunk Reseller – Reselling Partner for Lenovo, Acer, ASUS, and HP Computers and Networking Equipment Call (224) 634-4820 for a Better Phone System, Lower Monthly Phone Bill, and 24/7 Support!