Grandstream GRP2604 3-Line 6-SIP Carrier Grade IP Phone with Adapter

The Grandstream GRP2604 is a robust, three-line SIP phone built for enterprise and service provider deployments, offering six SIP accounts with up to three simultaneous call appearances. It delivers crystal-clear audio through a full-duplex speakerphone and HD voice quality, enhanced by noise-shield and AI noise-reduction technologies. The device supports 5-way voice conferencing and offers seamless compatibility with Plantronics, Jabra, and Sennheiser headsets via EHS support. Designed for large-scale rollout, it features zero-touch provisioning and integration with Grandstream’s GDMS cloud for centralized device management. Connectivity includes dual auto-sensing Gigabit Ethernet ports, and with the adapter included (in the non-PoE version), it provides flexible power deployment. Enterprise-level security is baked in, from secure boot and dual firmware images to encrypted storage, while swappable faceplates allow for customizable branding.