For Grandstream GXP1780, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our Grandstream GXP1780 has been well received by many customers and enjoyed a good reputation in many countries. Importgm International limited Grandstream GXP1780 have characteristic design & practical performance & competitive price, for more information on the Grandstream GXP1780, please feel free to contact us.