Cisco IP Phone 7800 Series | Enterprise VoIP & SIP Business Phones

The Cisco IP Phone 7800 Series is a professional business IP phone family designed to deliver reliable, secure, and high-quality voice communications for small, medium, and large organizations. It combines an ergonomic design with advanced IP telephony features, wideband audio support, programmable line keys, secure encrypted communications, and flexible deployment options.

The series includes four models for different user requirements. The Cisco 7811 supports one line and is suitable for basic office users. The Cisco 7821 supports two lines, while the Cisco 7841 supports four lines and adds Gigabit Ethernet connectivity. For users who manage a high number of calls, the Cisco 7861 supports up to sixteen lines.

The 7821, 7841, and 7861 feature a 3.5-inch grayscale backlit display with 396 × 162 resolution, while the 7811 includes a 3.28-inch grayscale display. Programmable line keys can be configured for phone lines, directory numbers, speed dialing, and other calling features. Fixed function keys provide convenient access to messaging, directories, hold/resume, transfer, conference, and other frequently used functions.

The Cisco IP Phone 7800 Series supports SIP-based communications, full-duplex speakerphone capability, call forwarding, conference calling, call waiting, caller ID, call pickup, call park, shared lines, voicemail, corporate directories, and multiple productivity features. Security capabilities include device and signaling authentication, encrypted configuration files, TLS signaling encryption, SRTP media encryption, and 802.1X authentication.

All four models support IEEE 802.3af Power over Ethernet Class 1, while an optional Cisco power adapter can be used for non-PoE environments. The series is suitable for organizations deploying or expanding Cisco Unified Communications solutions as well as supported hosted calling environments.

Main Features

• SIP-based IP telephony
• Secure encrypted voice communications
• Full-duplex speakerphone
• Programmable line keys
• Wideband audio support on applicable models
• Call hold, transfer, forwarding, and conferencing
• Caller ID and call history
• Corporate and personal directories
• Voicemail support
• Multiple adjustable ring tones
• Power over Ethernet
• Wall-mountable design
• Multi-call per-line support
• Localized language support including Arabic and Hebrew
• Energy-efficient operation

Cisco IP Phone 7811

• 1 line
• 3.28-inch grayscale display
• Resolution: 384 × 106 pixels
• Non-backlit display
• 10/100BASE-T Ethernet
• Two RJ-45 Ethernet ports
• IEEE 802.3af PoE Class 1
• Available in charcoal
• Standard narrowband handset
• Optional wideband handset available
• Weight: 806 g
• Dimensions: 207 × 195 × 33 mm

Cisco IP Phone 7821

• 2 lines
• 3.5-inch grayscale display
• Resolution: 396 × 162 pixels
• White backlighting
• 10/100BASE-T Ethernet
• Two RJ-45 Ethernet ports
• IEEE 802.3af PoE Class 1
• Wideband-capable handset
• Analog RJ-9 headset port
• Electronic Hook Switch support
• Available in charcoal and white
• Weight: 867 g
• Dimensions: 207 × 206 × 28 mm

Cisco IP Phone 7841

• 4 lines
• 3.5-inch grayscale display
• Resolution: 396 × 162 pixels
• White backlighting
• 10/100/1000BASE-T Gigabit Ethernet
• Two RJ-45 Ethernet ports
• IEEE 802.3af PoE Class 1
• Wideband-capable handset
• Analog RJ-9 headset port
• Electronic Hook Switch support
• Available in charcoal and white
• Weight: 868 g
• Dimensions: 207 × 206 × 28 mm

Cisco IP Phone 7861

• 16 lines
• 3.5-inch grayscale display
• Resolution: 396 × 162 pixels
• White backlighting
• 10/100BASE-T Ethernet
• Two RJ-45 Ethernet ports
• IEEE 802.3af PoE Class 1
• Wideband-capable handset
• Analog RJ-9 headset port
• Electronic Hook Switch support
• Available in charcoal and white
• Weight: 1053 g
• Dimensions: 207 × 265 × 28 mm

Display

Audio Features

• Automatic Gain Control
• Comfort Noise Generation
• Silence Suppression
• Voice Activity Detection
• Acoustic Echo Cancellation
• Dynamic Noise Reduction
• Full-duplex speakerphone
• Adjustable handset and ringer volume

Supported Audio Codecs

• G.711 A-law
• G.711 μ-law
• G.722
• G.722.2
• G.729ab
• iLBC
• OPUS

Calling Features

• Call hold and resume
• Call forwarding
• Call transfer
• Conference calling
• Call waiting
• Caller ID
• Call history
• Call park
• Call pickup
• Auto-answer
• Speed dial
• Redial
• Do Not Disturb
• Shared lines
• Corporate directory
• Personal directory
• Music on hold
• Message waiting indicator
• Voicemail
• Intercom on supported models
• Busy Lamp Field on supported models
• Extension Mobility
• Group call pickup
• Multi-call per-line support

Programmable Controls

• Programmable line keys
• Soft keys
• Navigation and select controls
• Hold/Resume key
• Transfer key
• Conference key
• Messaging key
• Services key
• Directory key
• Volume controls
• Speakerphone key
• Headset key on applicable models
• Mute key

Connectivity

• Signaling Protocol: SIP
• DHCP
• Static IP configuration
• Ethernet connectivity
• Cisco Discovery Protocol
• IEEE 802.1Q VLAN support
• Quality of Service support
• Two Ethernet RJ-45 ports
• Downstream Ethernet connection for devices such as PCs

Ethernet Speed

• Cisco 7811: 10/100BASE-T
• Cisco 7821: 10/100BASE-T
• Cisco 7841: 10/100/1000BASE-T
• Cisco 7861: 10/100BASE-T

Security

• Device authentication
• Image authentication
• File authentication
• Signaling authentication
• Certificate support
• 802.1X authentication
• Secure Real-Time Transport Protocol
• SRTP with AES-128
• TLS signaling encryption
• AES-128 and AES-256 support
• Encrypted configuration files

Power

• IEEE 802.3af Power over Ethernet
• PoE Class 1
• Maximum PoE power consumption: 3.84 W
• Optional Cisco Power Adapter 3 for non-PoE installations
• Power input rating: 0.42 A, 48 V DC

Supported Cisco Platforms

• Cisco Unified Communications Manager 12.5 and above
• Cisco Hosted Collaboration Solution
• Cisco Unified Survivable Remote Site Telephony

Language Support

The series supports multiple languages, including:

• Arabic
• English
• Hebrew
• French
• German
• Spanish
• Italian
• Turkish
• Russian
• Portuguese
• Chinese
• Japanese
• Korean
• And additional localized languages

Right-to-left onscreen text is also supported.

Installation

• Desktop installation
• Wall mounting with optional wall-mount kit
• Adjustable foot stand
• 30° and 45° viewing positions on the 7821, 7841, and 7861
• 45° foot-stand position on the 7811

Operating Conditions

• Operating temperature: 0°C to 40°C
• Non-operating temperature: -10°C to 60°C
• Operating humidity: 10% to 90%, non-condensing
• Non-operating humidity: 10% to 95%, non-condensing

Available Product Numbers

• CP-7811-K9= – Cisco IP Phone 7811
• CP-7821-K9= – Cisco IP Phone 7821
• CP-7841-K9= – Cisco IP Phone 7841
• CP-7861-K9= – Cisco IP Phone 7861
• CP-7821-W-K9= – Cisco IP Phone 7821 White
• CP-7841-W-K9= – Cisco IP Phone 7841 White
• CP-7861-W-K9= – Cisco IP Phone 7861 White

Warranty

Cisco standard 1-year replacement warranty.

Ideal For

• Medium and large enterprises
• Small businesses
• Corporate offices
• Reception and administrative desks
• Call-intensive employees
• Organizations migrating from analog phones
• Cisco Unified Communications deployments
• Hosted business telephony environments

Key Selling Point

A scalable and secure Cisco IP phone family offering professional voice quality, programmable calling features, PoE support, and options ranging from a simple one-line desk phone to a sixteen-line business communications device.