IP Phone Grandstream Networks GRP2603P Black

The Grandstream Networks GRP2603P is a 3-line Carrier-Grade IP phone with a compact, black design and a 2.48" LCD display. Designed for mass deployments, the GRP2603P supports zero-touch provisioning and integrated Power over Ethernet (PoE) to simplify installation and management. It supports standard VoIP protocols and offers full HD audio on both the speaker and handset for clear voice communication.

Advantages

The GRP2603P provides easy centralized provisioning and management suitable for large-scale rollouts, integrated PoE for simplified cabling and power, and full HD audio on handset and speaker for improved call clarity. The phone also supports 5-way voice conferencing and electronic headset support (EHS) for Plantronics, Jabra, and Sennheiser headsets, while multi-language support aids international deployments.

Suitable for

• Small and medium business desks requiring a reliable 3-line IP phone
• Mass deployments in enterprises or service provider environments
• Conference rooms and shared workspaces needing 5-way conferencing
• Offices that prefer PoE-powered devices to reduce cabling

Key specifications

• Model: GRP2603P
• Lines: 3-line support
• Display: 2.48" LCD
• Audio: Full HD audio on handset and speaker
• Networking: Fast Ethernet 10/100 Mbit/s, SIP/TCP-IP support
• Power: Integrated PoE (GRP2603P) and AC adapter input 100–240 V
• Conferencing: 5-way voice conferencing
• Headset support: EHS for Plantronics, Jabra, Sennheiser
• Colour: Black

How to use

Connect the GRP2603P to your network via Ethernet; if using PoE, the phone will receive power and network connectivity over a single cable. For zero-touch deployments, register the device with your provisioning server so configuration is applied automatically. Use the handset, speakerphone or a supported headset for calls; access the menu via the LCD screen to configure accounts, network settings, and audio preferences. Follow the included quick start guide for initial setup and SIP account registration.

Recommendations

For large-scale rollouts, prepare a provisioning server with manufacturer-provided configuration templates and enable PoE to minimize on-site cabling. Use certified EHS headsets for reliable headset switching and ensure firmware is kept up to date to maintain compatibility and security.