Grandstream provides affordable, professional VoIP solutions — IP phones, IP PBXs and much more. Grandstream IP phones bring high end features to your desk at incredible price points. Find wireless IP phones for mobile convenience in the office and IP conference phones for crystal clear group communications. Grandstream IP intercoms give you top tier access control solutions. Grandstream UCM Series IP PBXs are among the most widely used on premise VoIP phone systems in the world — for good reason.