Thanks for choosing Columbia Business Phone Systems! We are proud to be an authorized dealer of Grandstream IP phones, known for their innovation and high quality. Our selection includes new and refurbished models that offer more features than some of their competitors, all at an affordable price. If you have any questions or concerns about your purchase, our expert team is happy to answer them and help you find the right product for your business. From the latest telecommunication technology to lightly pre-owned devices, Columbia Business Phone Systems is here to provide great customer service while offering unbeatable prices!