IP Phone Grandstream Networks GRP2603 Black

The Grandstream Networks GRP2603 is a carrier-grade IP phone with a compact black design, three programmable lines and a 2.48" LCD display. Designed for business environments, the GRP2603 supports standard SIP-based VoIP protocols and Fast Ethernet (10/100 Mbit/s). It offers easy deployment with zero-touch provisioning and flexible power options including PoE on models that support it, making it suitable for managed multi-phone installations.

Advantages

The GRP2603 provides full HD audio on both handset and speaker to improve voice clarity during calls. It supports five-way voice conferencing for small team meetings and includes EHS compatibility with Plantronics, Jabra and Sennheiser headsets. Built for large deployments, it features zero-touch provisioning and centralized management capabilities, while its Fast Ethernet interface and SIP compatibility ensure interoperability with common VoIP systems.

Suitable for

• Small and medium office desks
• Reception and shared workstations
• Multi-device deployments managed centrally
• Users requiring headset support for frequent calls

Key specifications

• Model: Grandstream GRP2603 (MPN: GRP2603, EAN: 6947273703181)
• Lines: 3 programmable lines
• Display: 2.48" LCD
• Network: Fast Ethernet 10/100 Mbit/s, SIP/TCP/IP support
• Audio: Full HD audio on handset and speaker
• Conferencing: 5-way voice conferencing
• Headset: EHS support for Plantronics, Jabra and Sennheiser
• Colour: Black

How to use

Connect the GRP2603 to your network using the Ethernet port and either power it via a compatible PoE switch or the appropriate AC adapter. Register the device to your SIP server or PBX following the zero-touch provisioning process provided by your administrator or service provider. Configure line accounts and handset/headset settings through the phone's menu or the web management interface, then test call quality and conferencing functions before regular use.

Recommendations

For large rollouts, use the GRP2603's zero-touch provisioning and centralized management to simplify configuration. If using headsets, verify EHS compatibility and update firmware to ensure optimal audio performance. Choose the PoE-capable model (GRP2603P) when centralized power delivery is preferred.