Grandstream GRP2604 3-line Essential IP Phone

The Grandstream GRP2604 is an essential 3-line IP phone designed for streamlined voice communication and optimized for mass deployment. With built-in support for 5-way voice conferencing, HD audio, and Electronic Hook Switch (EHS) compatibility, it provides reliable and high-quality performance for on-site or remote workers. The GRP2604 features zero-touch provisioning, dual Gigabit ports, and enterprise-level security—making it ideal for service providers and large-scale enterprise use.

Product Features

3-line support with up to 6 SIP accounts Efficiently manage up to 6 SIP accounts and 3 simultaneous call appearances, ideal for multitasking professionals. Full HD audio with noise shield technology Enjoy clear communication through wideband HD audio on both speakerphone and handset, enhanced with built-in noise reduction. EHS headset compatibility Supports Electronic Hook Switch with Plantronics, Jabra, and Sennheiser headsets for hands-free convenience. 5-way audio conferencing Enable high-productivity team collaboration with integrated 5-way conferencing support. Gigabit Ethernet connectivity Dual auto-sensing 10/100/1000 Mbps ports ensure fast and reliable network performance. Secure and customizable Features enterprise-grade protection, including secure boot, encrypted configuration, and swappable faceplates for custom branding. Cloud provisioning via GDMS Fully compatible with Grandstream’s Device Management System for remote configuration, provisioning, and monitoring.

Product Specifications

• Display: 2.48-inch backlit graphical LCD (132 x 64 resolution)
• SIP accounts: 6
• Lines: 3 with dual-color LED line keys
• BLF keys: 10 programmable keys
• Feature keys:
  • 4 XML programmable softkeys
  • 5 navigation/menu keys
  • 8 dedicated function keys: MESSAGE (with LED), TRANSFER, HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE, VOL+, VOL–
• Voice codecs supported: G.729A/B, G.711µ/a-law, G.726, G.722 (wideband), G.723, iLBC, Opus
• Audio enhancements: VAD, AEC, CNG, PLC, AGC
• Telephony features:
  • Hold, transfer, forward
  • 5-way conference
  • Call park, call pickup
  • SCA/BLA support
  • XML/LDAP phonebook (up to 2000 entries)
  • Call log (up to 800 records)
  • Off-hook auto dial, auto answer
  • Click-to-dial, flexible dial plan, hot-desking
  • Custom music ringtones, music on hold
  • Server redundancy and failover
• Network interfaces: Dual Gigabit Ethernet ports (non-PoE model)
• Auxiliary port: RJ9 headset jack with EHS support for Plantronics, Jabra, and Sennheiser
• QoS support: 802.1Q, 802.1P, ToS, DiffServ, MPLS
• Security:
  • User/admin password access
  • 256-bit AES encrypted configuration
  • MD5/MD5-sess authentication
  • Secure boot, SRTP, TLS, 802.1x
• Provisioning & upgrade: FTP/TFTP/HTTP/HTTPS, TR-069, GDMS, AES encrypted XML
• Languages supported: English, Chinese, Korean, Japanese, German, Italian, French, Spanish, Portuguese, Russian, Croatian, and more
• Power:
  • Adapter: Input 100–240VAC, Output +5VDC, 600mA
• Operating environment:
  • Temperature: 0°C to 40°C (operation), -10°C to 60°C (storage)
  • Humidity: 10% to 90% non-condensing
• Base stand: 2-position (39° & 45°), wall-mountable (bracket sold separately)
• Physical dimensions: 214mm (L) x 206mm (W) x 68mm (H) (with handset)
• Weight: 790g (unit), 1100g (package)