IP Phone Grandstream Networks GRP2604 Black

The Grandstream Networks GRP2604 is a 3-line carrier-grade IP phone in a sleek black design, built for easy mass deployment and centralized management. It offers a 2.48-inch LCD (132 x 64) display, support for common voice codecs (including G.722, G.729 and OPUS), a 2000-entry phonebook and Gigabit Ethernet connectivity. The GRP2604 supports zero-touch provisioning and integrates with Grandstream’s GDMS for cloud provisioning and monitoring, making it suitable for enterprise, service provider and high-volume deployments.

Advantages

The GRP2604 provides carrier-grade security features such as secure boot, dual firmware images and encrypted data storage. It delivers full HD audio on both handset and speaker, supports 5-way voice conferencing and EHS compatibility with Plantronics, Jabra and Sennheiser headsets. Integrated PoE is available on the GRP2604P model, and the phone’s touchscreen LCD and large phonebook simplify daily use for on-site and remote desktop workers.

Suitable for

• Enterprise desktop telephony
• Service provider deployments and hotels
• Contact centers and shared workspaces
• Remote office workers requiring managed endpoints

Key specifications

• Model: Grandstream GRP2604 (MPN: GRP2604, EAN: 6947273703198)
• Lines: 3 lines
• Display: 2.48" LCD, 132 x 64 pixels, touchscreen
• Audio codecs: G.722, G.723, G.726, G.729A/B, OPUS
• Phonebook capacity: 2000 entries
• Ethernet: Gigabit Ethernet
• Speakerphone: Full HD speaker and handset
• Headset support: EHS for Plantronics, Jabra, Sennheiser
• Security: Secure boot, dual firmware images, encrypted storage
• Provisioning & management: Zero-touch provisioning, GDMS support
• Colour: Black

How to use

Connect the GRP2604 to your network using the Gigabit Ethernet port or PoE (on GRP2604P). Power on the device and enroll it into your provisioning system; for large deployments use Grandstream Device Management System (GDMS) or your preferred provisioning server for zero-touch configuration. Use the touchscreen LCD to navigate menus, add contacts to the 2000-entry phonebook, configure SIP accounts and set audio preferences. For headset use, enable EHS support and pair the compatible headset according to the headset manufacturer’s instructions.

Recommendations

For secure and scalable deployments, register devices through GDMS and keep firmware updated. Use PoE where possible to simplify cabling, and select the GRP2604P if integrated PoE is required. For best audio quality, use supported wideband codecs (G.722 or OPUS) and ensure sufficient network bandwidth.