SPA504G Cisco VOIP Phone 4 Lines Charcoal Display

Cisco SPA504G VoIP Phone 4-Line Business IP Telephone

The Cisco SPA504G VoIP Phone is a reliable business communication solution built for organizations that require dependable IP telephony with support for up to four phone lines. Designed with a crisp backlit display, intuitive navigation keys, and enterprise-grade voice quality, this professional desk phone helps improve workplace productivity. Its integrated Ethernet switch, Power over Ethernet (PoE) support, HD voice technology, and advanced call management capabilities make it an excellent choice for offices, customer service teams, and growing businesses seeking efficient and cost-effective VoIP communications.

General Information

• Brand: Cisco
• Part Number: SPA504G
• Series: 500
• Type: VoIP Phone

Technical Specifications

• Network Ports (RJ-45): 2
• Headset Port: Yes
• Color Options: Silver, Dark Gray
• Material: ABS Plastic

Advanced Calling Features

• 3-way conference calling support
• Built-in intercom functionality
• Digital full-duplex speakerphone
• Caller ID display
• Automatic redial feature
• Integrated voicemail support
• Call waiting, forwarding, transfer, and hold
• On-hook dialing capability
• Music on Hold support
• Built-in call timer and clock
• Pager call functionality
• Built-in web management interface

VoIP and Network Capabilities

• Supports SIP, SIP v2, and SPCP protocols
• Compatible with G.722, G.729a, G.711u, G.711a, and G.726 voice codecs
• HD Voice support for enhanced audio clarity
• Comfort Noise Generation (CNG)
• Voice Activity Detection (VAD)
• Dynamic IP assignment using DHCP
• IEEE 802.1Q VLAN support
• IEEE 802.1p Quality of Service (QoS)
• Differentiated Services (DiffServ)
• Type of Service (TOS) support
• 256-bit AES security encryption
• Supports IP, TCP, UDP, TFTP, HTTP, HTTPS, DNS, ICMP, and ARP protocols
• Network Address Translation (NAT) support

Memory and Display

• Directory stores up to 100 contacts
• Call history stores up to 60 records
• 128 × 64 pixel backlit LCD screen
• Easy-to-read display for call information and menu navigation

Compatibility

• Compatible with SIP-based IP PBX systems, hosted VoIP providers, open-source PBX platforms including Asterisk and FreePBX, and Cisco Unified Communications 300 (UC300) and 500 (UC500) Series Small Business systems using SPCP.

Cisco SPA504G VoIP Phone 4 Lines Charcoal Display

The Cisco SPA504G VoIP Phone 4 Lines Charcoal Display is a dependable business communication solution designed for organizations that require reliable voice connectivity, exceptional call clarity, and efficient call management. Built for modern office environments, this desktop IP phone combines advanced Voice over IP technology with a user-friendly interface, making it suitable for businesses of every size. Whether deployed in a small office, a growing enterprise, a customer support department, or a corporate headquarters, the Cisco SPA504G provides consistent communication performance that helps improve workplace productivity.

Supporting four independent phone lines, the Cisco SPA504G enables professionals to manage multiple calls without unnecessary complexity. Employees can switch between conversations, transfer calls, place callers on hold, initiate conference calls, and monitor active extensions while maintaining excellent voice quality. The charcoal display complements professional workspaces with a clean and sophisticated appearance that blends seamlessly into modern office furniture and communication environments.

The intuitive interface reduces the learning curve for new users while offering powerful functionality for experienced office professionals. Large navigation keys, programmable feature buttons, dedicated function keys, and a well-organized display allow users to perform daily communication tasks quickly and efficiently.

Modern IP Telephony Systems

Business communication continues to evolve as organizations migrate from traditional telephone systems toward flexible IP-based infrastructures. The Cisco SPA504G supports this transition by offering compatibility with numerous SIP-based VoIP systems. Organizations can implement scalable communication networks while reducing maintenance complexity and improving operational flexibility.

Internet Protocol telephony allows voice communication to travel over existing network infrastructure instead of relying exclusively on conventional analog telephone systems. This approach simplifies deployment, improves scalability, and enables organizations to integrate voice communication into broader business networks.

The Cisco SPA504G is engineered for stable long-term performance in professional environments where communication reliability remains a critical business requirement.

Multiple Line Support

Four independent line appearances provide flexibility for different communication workflows. Users may dedicate individual lines to separate departments, external clients, internal communication, executive contacts, or priority customer interactions. This organized structure simplifies call management and improves workplace efficiency.

High Quality Voice Performance

Clear communication is essential for productive business operations. The Cisco SPA504G delivers impressive audio quality designed to minimize misunderstandings during conversations. Enhanced voice processing technology contributes to natural sounding discussions whether communicating with colleagues across the office or customers located internationally.

Professional voice clarity becomes particularly valuable during lengthy discussions involving contracts, technical support, customer consultations, financial transactions, and executive meetings.

Enterprise Deployment Advantages

Large organizations often deploy standardized communication hardware across multiple departments. Standardization simplifies employee training, maintenance procedures, technical support, and inventory management.

The Cisco SPA504G integrates comfortably into enterprise communication environments where consistent user experiences and reliable performance remain important operational objectives.

Network Integration

The Cisco SPA504G integrates into business Ethernet networks while supporting VoIP communication infrastructure. Network-based deployment simplifies centralized management compared with many legacy telephone systems.

Organizations implementing structured network environments appreciate consistent communication performance alongside existing business applications.

Reliable Platform

Whether supporting customer engagement, executive collaboration, internal coordination, technical assistance, or administrative communication, the Cisco SPA504G provides dependable functionality suitable for demanding business environments. Organizations looking for a professional desktop VoIP solution continue to value this communication platform for its balance of performance, usability, flexibility, and operational efficiency.