Best 4-Line VoIP Phones of 2026

The Grandstream GRP2613 Phone is designed to handle multiple calls efficiently, supporting up to six lines and four SIP accounts, which lets you manage different numbers or extensions with ease. It features built-in Power over Ethernet (PoE), so you can power the phone through your network cable without needing a separate power adapter, simplifying your setup. The phone also offers customizable faceplates, allowing you to add your own logo or branding, making it perfect for businesses. Additionally, it includes noise shield technology that reduces background sounds, so your conversations stay clear and professional. These features make the GRP2613 a reliable and user-friendly choice for busy office environments.

The Poly VVX 411 12-Line VOIP Business Phone provides clear audio quality with Poly HD voice technology and Poly Acoustic fence technology, and ensures a noise-free environment. The phone has 12 line keys, 4 context-sensitive soft keys, and a backlit 3.5" color display. It features two high-speed 10/100/1000 Ethernet ports with an integrated switch and a USB port, which allows LAN connection for your phone with a passthrough connection to your PC. The phone supports the use of headsets for additional call, mute and volume controls.

The Cisco SPA504G IP Phone is a SIP-based device designed for Small Business Pro Unified Communications 320. It has been tested for interoperability with equipment from voice over IP (VoIP) infrastructure leaders, ensuring service providers can offer competitive and feature-rich services. With hundreds of features and configurable service parameters, the phone caters to traditional business users while building on the advantages of IP telephony. The phone includes easy station moves and shared line appearances, along with standard encryption protocols for secure remote provisioning and unobtrusive in-service software upgrades.

The Grandstream GRP2612P Phone is a reliable VoIP device designed for efficient communication. It supports up to four lines and SIP accounts, letting you manage multiple calls or extensions easily. The 2.4-inch color screen provides a clear and simple interface, helping you navigate calls and settings without hassle. With dual 10/100 Ethernet ports and built-in Power over Ethernet (PoE), you can connect to your network and power the device with a single cable, reducing clutter. This phone is a practical choice if you want a straightforward, multi-line communication tool for your office or home setup.