Grandstream GXP2135 HD IP Phone

Grandstream: Powering Unified Communications & Networking

Since 2002, Grandstream has connected businesses worldwide with reliable, open‑standard SIP-based communication and networking solutions. Headquartered in Boston, the company serves over 150 countries, offering a one-stop portfolio across unified communications, networking, collaboration, and physical security.

Innovation Rooted in Quality & Reliability

Grandstream consistently delivers award-winning products by integrating customer feedback into its research and development process. Moreover, its devices undergo rigorous internal testing to ensure top quality and dependability. As a result, users trust Grandstream to maximize productivity while reducing communication costs and enhancing security.

Diverse Product Portfolio & Comprehensive Solutions

Grandstream offers a broad range of products, including IP voice and video phones, ATAs, IP PBXs, intercoms, access systems, Wi‑Fi routers, switches, and conferencing solutions. It also pioneers convergence with its GCC Series, which combines PBX, firewall, network switch, and router in one appliance. Plus, the company provides free cloud and on-premise management tools like GDMS for seamless provisioning and monitoring.

Global Presence & Support Ecosystem

Operating from its Boston headquarters and multiple global offices, Grandstream employs around 500 staff and maintains a global distribution network. In addition, it supports partners with extensive training, strong technical help, and flexible programs—including OEM and white-label options.

Future-Ready Vision & Market Leadership

Looking forward, Grandstream emphasizes next-gen technology, including Wi‑Fi 7 access points and full unified communications/cloud integration. Consequently, it empowers small and medium businesses with scalable, secure, and cost-effective communication platforms. By maintaining its focus on quality, innovation, and value, Grandstream stays at the forefront of UC and networking solutions.