Cisco SPA504G 4-Line IP Phone with PoE and SIP Support

The Cisco SPA504G 4-Line IP Phone is a professional SIP-based VoIP desk phone designed for small and medium-sized businesses that require reliable, high-quality voice communication. Supporting up to four independent SIP accounts, this IP phone delivers secure, crystal-clear calls with wideband audio and full-duplex speakerphone functionality. With Power over Ethernet (PoE) capability, dual Ethernet ports, advanced security features, and compatibility with major IP PBX platforms, the Cisco SPA504G is ideal for office environments that demand performance, flexibility, and easy deployment.

Product Features

4-Line SIP Support for Multi-Account Management

The Cisco SPA504G supports up to four voice lines with independent SIP registrations, allowing users to manage multiple extensions or VoIP accounts from a single device. This makes it ideal for reception desks, managers, and shared office environments.

High-Definition Voice Quality

With support for wideband audio codecs such as G.722 in addition to G.711, G.726, and G.729, the phone delivers enhanced voice clarity for professional communication. The built-in full-duplex speakerphone ensures clear hands-free conversations without echo.

Power over Ethernet (PoE) Capability

Integrated IEEE 802.3af PoE support allows the phone to receive power directly from a compatible network switch, reducing cable clutter and eliminating the need for separate power adapters.

Dual Ethernet Ports with Integrated Switch

Equipped with two 10/100 Mbps Ethernet ports, the SPA504G enables connection of a desktop computer through the phone, helping reduce the need for additional network cabling.

Secure VoIP Communication

The phone supports secure provisioning via HTTPS, secure SIP signaling, and encrypted voice communication to protect business conversations and configuration data.

Intuitive Backlit Display

A 128 x 64 pixel monochrome backlit LCD screen provides easy navigation, caller information display, and access to phone features even in low-light environments.

Advanced Business Telephony Features

Includes call hold, call transfer, call waiting, three-way conferencing, caller ID, redial, call forwarding, speed dial, message waiting indicator, and corporate directory support.

Remote Provisioning and Web-Based Configuration

Administrators can configure and manage the phone remotely using a web-based interface or automated provisioning systems, making it suitable for multi-site deployments.

Headset and Expansion Module Support

The device includes a 2.5 mm headset port for wired headsets and supports optional SPA500S expansion modules for additional programmable keys.

Product Specifications

• Model: Cisco SPA504G
• Lines: 4 SIP lines
• Protocols: SIP, SPCP
• Display: 128 x 64 pixel monochrome backlit LCD
• Ethernet Ports: 2 x 10/100 Mbps switched ports
• Power: IEEE 802.3af PoE or optional external power adapter
• Audio Codecs: G.711 (a-law and mu-law), G.722, G.726, G.729
• Speakerphone: Full-duplex
• Headset Port: 2.5 mm jack
• Security: HTTPS provisioning, secure SIP, encryption support
• Conference Calling: 3-way local conferencing
• Expansion Support: Compatible with SPA500S attendant console
• Mounting Options: Desk stand and wall mountable
• Provisioning: Web GUI, remote provisioning support
• Dimensions: Approx. 8.3 x 7.3 x 1.8 inches
• Network Features: VLAN support, QoS support
• Operating Temperature: 0 to 40 degrees Celsius

The Cisco SPA504G IP Phone is an ideal solution for businesses seeking a dependable SIP desk phone with advanced telephony features, secure connectivity, and flexible deployment options for modern IP communication systems