Grandstream GRP2603 3-line Essential IP Phone

The Grandstream GRP2603 is a professional-grade 3-line IP phone designed for high-volume deployments with zero-touch provisioning for easy setup and centralized management. It features advanced capabilities including 5-way audio conferencing, full HD audio on both speaker and handset, dual Gigabit ports, and EHS headset compatibility. Ideal for remote workers and business professionals, the GRP2603 delivers enterprise-level security, seamless provisioning via GDMS, and exceptional audio clarity in every call.

Product Features

3 lines and 6 SIP accounts Supports up to 3 call appearances and 6 SIP accounts, offering flexibility for multi-line users. HD audio with noise shield technology Full-duplex speakerphone and HD handset audio ensure clear communication with reduced background noise. Gigabit Ethernet connectivity Dual auto-sensing 10/100/1000 Mbps ports deliver high-speed networking with integrated security. EHS headset support Compatible with Plantronics, Jabra, and Sennheiser headsets for hands-free functionality. 5-way voice conferencing Allows easy collaboration with multiple parties directly from the phone. Enterprise-grade security Includes secure boot, dual firmware images, encrypted data storage, and TLS/SRTP protocols for safe deployments. Easy logo customization Swappable faceplate enables brand personalization for service providers and enterprises. GDMS support Grandstream Device Management System enables centralized provisioning, monitoring, and management.

Product Specifications

• Display: 2.48″ backlit graphical LCD (132 x 64 pixels)
• Lines/SIP accounts: 3 lines, 6 SIP accounts
• Network ports: Dual auto-sensing 10/100/1000 Mbps Gigabit Ethernet ports
• Audio: Wideband HD audio on speaker and handset, full-duplex, noise shield
• Conferencing: 5-way voice conferencing
• Feature keys:
  • 3 line keys with dual-color LEDs
  • 4 XML programmable context-sensitive soft keys
  • 5 navigation/menu keys
  • 9 function keys: MESSAGE (LED), TRANSFER, HOLD, HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE, VOL+, VOL–
• Headset port: RJ9 with EHS support
• Voice codecs: G.729A/B, G.711μ/a-law, G.726, G.722 (wideband), G.723, iLBC, OPUS
• Audio features: VAD, AEC, CNG, PLC, AGC
• Telephony features: Hold, transfer, forward Call park/pickup SCA/BLA Call waiting/log (up to 800 records) Auto dial, auto answer LDAP/XML phonebook (up to 2000 entries) Hot-desking, click-to-dial Server redundancy and fail-over Custom ringtones and music on hold
• Security: MD5/MD5-sess authentication SRTP, TLS, 802.1x media access control 256-bit AES encrypted config files Secure boot
• Provisioning: GDMS, TR-069, FTP/TFTP/HTTP/HTTPS AES encrypted XML configuration
• QoS: Layer 2 (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS)
• Multi-language support: English, Chinese, French, Spanish, Portuguese, Italian, German, Russian, Japanese, Korean, Croatian, and more
• Base stand: 2 adjustable angles (39° & 45°); wall mountable (*bracket sold separately)
• Power:
  • Universal adapter: 100–240VAC, 50–60Hz; output +5VDC, 600mA
  • PoE not available in GRP2603 base model
• Temperature & humidity:
  • Operating: 0°C to 40°C
  • Storage: -10°C to 60°C
  • Humidity: 10% to 90% non-condensing
• Physical dimensions: 214mm (L) × 206mm (W) × 68mm (H)
• Unit weight: 780g
• Package weight: 1140g (GRP2603), 1090g (GRP2603P)
• Package contents: GRP2603 phone, handset with cord, base stand, universal power supply, network cable, quick installation guide