GRP Series Professional Grandstream IP Phones in Dubai UAE. Grandstream GRP2600 series are built for widespread deployment. This new generation of IP phones has a robust feature set, a unified firmware, a sleek new design, and a reinvented user experience. The GRP series, which is intended for businesses, service providers, and other high-volume sectors, delivers a potent, user-friendly, and quickly deployable voice platform with cutting-edge features for premium users.