CP-7841-K9 Cisco VoIP Phone

Cisco CP-7841-K9 - IP Phone 7841 Overview

The Cisco IP Phone 7841 is part of the Cisco 7800 Series, which provides cost-effective, secure, and reliable VoIP communications. The 7841 sits in the middle of the lineup, offering more functionality than the 7811 (1 line) and 7821 (2 lines), but below the 7861 (16 lines).

🔧 Key Specifications

• Lines Supported: 4 programmable lines
• Display:
  • 3.5-inch (384x106 pixel) grayscale display
  • Backlit for visibility in all lighting conditions
• Audio:
  • Wideband audio (G.722 codec support)
  • Full-duplex speakerphone
  • Headset support (RJ-9 and EHS options)
• Connectivity:
  • 2x 10/100/1000 Gigabit Ethernet ports (switch + PC passthrough)
  • Power over Ethernet (PoE) Class 1 support
  • Optional external power adapter if PoE not available
• User Interface:
  • Four programmable line/feature keys
  • Fixed feature keys (hold, transfer, conference, voicemail, etc.)
  • Four-way navigation cluster
• Security:
  • Secure boot and image authentication
  • TLS/SRTP for signaling and media encryption
• Deployment Options:
  • Cisco Unified Communications Manager (CUCM)
  • Cisco Hosted Collaboration Solution (HCS)
  • Cisco Webex Calling (with appropriate firmware)

🧩 Ideal Use Cases

• Knowledge workers and managers with moderate call volumes
• Shared workspaces where multiple lines or extensions are needed
• Cost-sensitive deployments requiring enterprise-grade reliability
• Organizations standardizing on Cisco Unified Communications