Cisco CP-7841-K9 (CP-7841-K9=) 4-Line Gigabit VoIP IP Phone with 3.5” Backlit Display, PoE | Brand New

The Cisco CP-7841-K9 is a 4-line, enterprise-grade Gigabit VoIP desk phone built for modern business communications. Featuring a 3.5” backlit grayscale display, dual-port 10/100/1000 Ethernet, and full-duplex speakerphone, this IP telephone delivers reliable, secure, and high-quality voice for offices, enterprises, education, healthcare, retail, and call centers. Designed for Cisco Unified Communications environments, it supports SIP and SCCP (Skinny) with CUCM/CME, providing seamless deployment and intuitive user experience. Elevate your desk with a business-class Cisco 7841—a proven, scalable IP endpoint for professionals and teams.

Key Features & Benefits

• 4 Programmable Lines/Keys: Manage multiple lines, extensions, and shared appearances
• 3.5” Backlit Display: Clear grayscale LCD for easy navigation and status visibility
• Dual-Port Gigabit Ethernet: 10/100/1000 Mbps with built-in switch for PC pass-through
• PoE (802.3af): Simplified cabling and power via network (external PSU optional, sold separately)
• Wideband Audio: HD voice with full-duplex speakerphone, handset, and headset
• Headset-Ready (RJ-9): Plug in a wired headset for hands-free productivity
• Secure Voice: TLS signaling and SRTP media encryption support
• Enterprise Integration: Optimized for Cisco Unified Communications Manager and Cisco Unified CME
• User-Friendly Controls: Dedicated keys for voicemail, mute, volume, transfer, hold, speaker, headset
• Flexible Placement: Two-position stand; wall-mount capable with optional Cisco
• Model: 7841
• Part Numbers: CP-7841-K9, CP-7841-K9=
• Lines: 4
• Display: 3.5” backlit grayscale LCD
• Networking: Dual-port 10/100/1000 Ethernet (integrated switch)
• Power: IEEE 802.3af PoE (optional external power adapter sold separately)
• Audio: Wideband (G.722), G.711a/u, G.729a; full-duplex speakerphone
• Interfaces: RJ-45 network, RJ-9 headset, RJ-9 handset
• Protocols: SIP and SCCP with Cisco UC platforms (version dependent)
• Security: 802.1X, TLS, SRTP
• Mounting: Desktop stand (two angles), wall-mount capable (kit optional)
• Condition: New

Typical Use Cases

• Enterprise and SMB offices: Reliable daily calling for executives, managers, and staff
• Reception and shared areas: Multiple lines and quick call handling
• Call centers and help desks: High-quality audio with headset support
• Education, healthcare, retail: Secure, manageable endpoints at scale

Compatibility Highlights

• Cisco Unified Communications Manager (CUCM): Enterprise firmware support (version dependent)
• Cisco Unified CME & SRST: Branch survivability and flexible deployments
• Note: This is the enterprise firmware model; for broad third‑party SIP providers, Cisco 3PCC/MPP variants are typically required

Frequently Asked Questions

• Does it include a power adapter?
  The CP-7841-K9 supports PoE (802.3af). If your network switch does not provide PoE, an external power adapter may be required (sold separately).
• Is this phone Gigabit?
  Yes, it features dual-port 10/100/1000 Ethernet with PC pass-through.
• Will it work with SIP?
  Yes, in Cisco UC environments (CUCM/CME). For non-Cisco third‑party SIP services, a 3PCC/MPP model is generally needed.
• Can I use a wired headset?
  Yes, the phone includes an RJ-9 headset port and supports wideband audio.
• Is wall mounting possible?
  Yes, with an optional wall-mount kit (not included).

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