Cisco IP Phone 6800 Series MPP | Business VoIP & SIP Phones

The Cisco IP Phone 6800 Series with Multiplatform Firmware (MPP) is a professional business IP phone family designed for organizations that need reliable voice communication, flexible deployment, and compatibility with cloud-based calling services. The series includes several models to suit different business requirements, from basic office extensions to advanced multi-line users.

The phones support SIP-based communications and are designed to work with platforms such as Cisco Webex Calling, Webex Calling Carrier, Cisco BroadWorks, and supported third-party UCaaS environments. Depending on the model, users can benefit from multiple SIP registrations, programmable line keys, full-duplex speakerphone capability, headset connectivity, Gigabit Ethernet, Power over Ethernet, Wi-Fi, and color display options.

The Cisco 6800 Series also includes essential business calling functions such as call hold, call transfer, call forwarding, conference calling, caller ID, call waiting, call pickup, call park, voicemail notification, shared lines, and Busy Lamp Field support. Security features include encrypted provisioning, TLS, SRTP media encryption, authentication, and password protection.

Different models offer different levels of functionality. The Cisco 6821 is suited for standard office users, while the 6841 and 6851 provide larger displays and additional line capability. The 6861 adds built-in dual-band Wi-Fi for more flexible installations, while the 6871 provides a color display, Gigabit Ethernet, USB headset connectivity, and support for additional SIP registrations.

The Cisco IP Phone 6851 can also be used with the optional Cisco 6800 Key Expansion Module, making it suitable for receptionists, administrative staff, assistants, and other users who manage a large number of calls.

Overall, the Cisco IP Phone 6800 Series provides businesses with a scalable and secure IP telephony solution suitable for offices, corporate environments, remote workspaces, reception areas, and organizations transitioning from traditional telephone systems to modern cloud-based communications.

Main Features

• SIP-based business IP phones
• Multiple SIP registrations depending on model
• Full-duplex speakerphone
• Programmable line keys
• Call transfer, forwarding, hold, and conferencing
• Caller ID and call history
• Voicemail notification
• Headset support
• Secure voice communications
• Auto-provisioning support
• Wall-mountable design
• Cloud calling compatibility
• Selected models support PoE
• Cisco 6861 includes built-in Wi-Fi
• Cisco 6871 includes a color display and USB connectivity

Cisco 6821

• 2 SIP registrations
• 2.5-inch grayscale display
• 240 × 120 resolution
• 10/100 Ethernet
• Two RJ-45 Ethernet ports
• IEEE 802.3af PoE Class 2

Cisco 6841

• 4 SIP registrations
• 3.5-inch grayscale display
• 396 × 162 resolution
• Gigabit Ethernet
• Two RJ-45 Ethernet ports
• External power adapter

Cisco 6851

• 4 SIP registrations
• 3.5-inch grayscale display
• 396 × 162 resolution
• Gigabit Ethernet
• IEEE 802.3af PoE Class 2
• Electronic Hook Switch headset support
• Supports one Cisco 6800 Key Expansion Module

Cisco 6861

• 4 SIP registrations
• 3.2-inch grayscale display
• 320 × 120 resolution
• 10/100 Ethernet
• Built-in dual-band Wi-Fi
• 2.4 GHz and 5 GHz support
• IEEE 802.11a/b/g/n
• Electronic Hook Switch headset support
• External power adapter

Cisco 6871

• 6 SIP registrations
• 3.5-inch color display
• 480 × 272 resolution
• Gigabit Ethernet
• USB-A port
• IEEE 802.3af PoE Class 3
• Electronic Hook Switch headset support

Audio Features

• Full-duplex speakerphone
• Adjustable handset, headset, speaker, and ringer volume
• Wideband audio support on applicable models
• G.711 A-law and μ-law
• G.722
• G.722.2
• G.729ab
• iLBC
• OPUS
• DTMF support

Calling Features

• Call hold and resume
• Call transfer
• Call forwarding
• Three-way conference calling
• Call waiting
• Caller ID
• Call history
• Do Not Disturb
• Call pickup
• Call park
• Shared lines
• Busy Lamp Field
• Intercom
• Multicast paging
• Music on hold
• Programmable line keys
• Voicemail indication

Connectivity

• SIP protocol
• Ethernet
• DHCP
• IPv4
• Cisco Discovery Protocol
• LLDP
• DNS
• SNTP
• TCP/UDP
• VLAN support
• Zero Touch Provisioning

Security

• 802.1X authentication
• Device authentication
• Password protection
• HTTPS provisioning
• TLS 1.2
• SRTP media encryption
• AES encryption
• Encrypted configuration files
• Certificate-based security features

Supported Platforms

• Cisco Webex Calling
• Webex Calling Carrier
• Cisco BroadWorks
• Supported UCaaS and SIP-based platforms

Cisco 6800 Key Expansion Module

Compatible with the Cisco IP Phone 6851.

Key features include:

• 14 physical buttons
• Up to 28 programmable positions using page controls
• Two 3.5-inch grayscale LCD displays
• Programmable line keys
• Status indicators

Ideal For

• Corporate offices
• Small and medium businesses
• Reception desks
• Administrative staff
• Remote offices
• Home offices
• Call-intensive environments
• Businesses using Webex Calling
• SIP-based communication systems

Key Selling Point

A flexible Cisco business IP phone family combining secure SIP communications, cloud calling compatibility, professional voice features, and multiple hardware options for different workplace requirements.