Cisco Desk Phone 9800 Series | Enterprise IP Phones & Webex Calling

The Cisco Desk Phone 9800 Series is a modern enterprise communications portfolio designed for today’s office, hybrid-work, and shared-workspace environments. The series combines secure business calling, meetings, desk reservation, hot desking, emergency notifications, advanced audio, and workplace collaboration features within a unified desk phone platform powered by Cisco PhoneOS.

The portfolio consists of five phone models: Cisco 9811, 9841, 9851, 9861, and 9871, allowing organizations to select a device according to user requirements and workspace needs. The 9811 provides a straightforward 2.6-inch grayscale display, while the 9841 offers a larger 3.5-inch grayscale backlit display. The 9851 introduces a 3.7-inch color screen, while the advanced 9861 and 9871 feature 5-inch color displays, with the 9871 offering a high-resolution touchscreen.

The 9800 Series supports Cisco Unified Communications Manager, Webex Calling, Webex Dedicated Instance, Cisco BroadWorks, Microsoft SIP Gateway, Asterisk, and other supported cloud calling platforms. A single PhoneOS platform allows organizations to simplify deployment and management across different communication environments.

Advanced audio capabilities include full-duplex speakerphone operation, acoustic echo cancellation, automatic gain control, packet-loss concealment, wideband audio, and Cisco smart audio features. The 9841, 9851, 9861, and 9871 support AI-based background noise reduction for outgoing audio, while the 9861 and 9871 add incoming noise reduction and technology that can enhance narrowband voice to provide a wider-band listening experience.

The series also includes a customizable Action Button, providing rapid access to functions such as emergency alerts, paging, security workflows, or customized applications. Selected models support desk reservation, hot desking, One Button to Push meeting access, Webex Companion functionality, meeting transcription, and Webex meeting summaries.

Security capabilities include Secure Boot, device and image authentication, encrypted configuration files, TLS 1.3, SRTP media encryption, secure credential storage, HTTPS, 802.1X authentication, and Trusted Platform Module 2.0 on applicable models.

The Cisco Desk Phone 9800 Series is suitable for organizations seeking a scalable business communications platform for individual workstations, shared desks, executive offices, customer-service teams, hybrid workplaces, and enterprise deployments.

Main Features

• Cisco PhoneOS operating platform
• Enterprise-grade SIP calling
• Webex Calling compatibility
• Cisco Unified Communications Manager support
• Cisco BroadWorks support
• Microsoft SIP Gateway compatibility
• Secure enterprise communications
• Full-duplex speakerphone
• Cisco HD audio
• AI-based background noise removal on selected models
• Programmable line keys
• Customizable Action Button
• Caller ID and call history
• Call hold, transfer, forwarding, and conferencing
• Desk reservation and hot desking on supported models
• One Button to Push meeting access on supported models
• Webex Companion support
• Emergency notification capabilities
• USB connectivity on supported models
• Bluetooth and Wi-Fi on selected models
• Key Expansion Module support on selected models
• PoE support
• Accessibility features
• Advanced security architecture

Cisco Desk Phone 9811

• 2.6-inch grayscale LCD
• Resolution: 256 × 132
• 2 physical line keys
• Maximum 2 programmable/line keys
• 10/100BASE-T Ethernet
• RJ-9 headset port
• Full-duplex speakerphone
• Narrowband handset included
• Compatible with optional wideband handset
• Front Arc LED status indicator
• IEEE PoE Class 2
• Dimensions: 209 × 200 × 49.4 mm
• Weight: 849 g

Cisco Desk Phone 9841

• 3.5-inch grayscale backlit LCD
• Resolution: 384 × 160
• 4 physical line keys
• Maximum 4 programmable/line keys
• Gigabit Ethernet
• USB-A port
• Wideband handset
• AI-based outgoing background noise removal
• Front Arc LED
• Top 360 LED
• Full-duplex speakerphone
• IEEE PoE Class 2
• Dimensions: 214 × 214 × 49.4 mm
• Weight: 954 g

Cisco Desk Phone 9851

• 3.7-inch color backlit LCD
• Resolution: 480 × 240
• 6 physical line keys
• Supports up to 46 programmable/line keys
• Gigabit Ethernet
• USB-A port
• USB-C port
• Wideband handset
• AI-based outgoing background noise removal
• Calendar button
• Front Arc LED
• Top 360 LED
• Supports Cisco 9800 Key Expansion Module
• IEEE PoE Class 3
• Dimensions: 226 × 214 × 49.4 mm
• Weight: 968 g

Cisco Desk Phone 9861

• 5-inch color backlit LCD
• Resolution: 800 × 480
• 10 physical line keys
• Supports up to 130 programmable/line keys
• Gigabit Ethernet
• USB-A
• USB-C
• Bluetooth 5.2 on radio-enabled models
• Dual-band Wi-Fi on radio-enabled models
• AI outgoing and incoming noise reduction
• Narrowband-to-wideband audio enhancement
• ThousandEyes Endpoint Agent
• Calendar button
• Front Arc LED
• Top 360 LED
• Supports up to three KEMs with appropriate local power
• IEEE PoE Class 3
• Dimensions: 226 × 230 × 49.4 mm
• Weight: 1095 g

Cisco Desk Phone 9871

• 5-inch color touchscreen
• Resolution: 1280 × 720
• Up to 128 programmable/line keys
• Gigabit Ethernet
• USB-A
• USB-C
• Bluetooth 5.2 on radio-enabled models
• Dual-band Wi-Fi on radio-enabled models
• AI outgoing and incoming background noise removal
• Narrowband-to-wideband audio enhancement
• ThousandEyes Endpoint Agent
• Webex meeting transcription support
• Webex meeting summary support
• Front Arc LED
• Top 360 LED
• Supports Cisco 9800 Key Expansion Module
• IEEE PoE Class 3
• Dimensions: 226 × 214 × 49.4 mm
• Weight: 1055 g

Display

Audio Features

• Cisco HD audio
• Full-duplex speakerphone
• Acoustic Echo Cancellation
• Automatic Gain Control
• Comfort Noise Generation
• Voice Activity Detection
• Packet Loss Concealment
• Adaptive jitter buffer
• Acoustic shock protection
• Forward Error Correction
• DTMF support
• Hearing Aid Compatible handset
• AI-based background noise removal on supported models
• AI-enhanced incoming audio on 9861 and 9871

Supported Audio Codecs

• OPUS
• G.722
• G.722.2
• iSAC
• G.711 A-law
• G.711 μ-law
• G.729a/b
• iLBC

Calling Features

• Caller ID
• Call waiting
• Hold and resume
• Call forwarding
• Call transfer
• Conference calling
• Call park
• Call pickup
• Do Not Disturb
• Call back
• Speed dial
• Redial
• Busy Lamp Field
• Shared lines
• Voicemail
• Call recording support
• Paging
• Intercom
• Hunt groups
• Directory search
• Local and remote call history
• Adjustable ringtones and volume
• E.911 functionality
• Hot desking on supported models
• Flexible seating
• Webex unified call history
• Webex directory
• Webex meetings on supported models
• One Button to Push meeting access
• Webex Companion
• Desk Phone Control through Webex App

AI & Smart Collaboration Features

AI Background Noise Removal

Supported on 9841, 9851, 9861, and 9871 for outgoing audio.

Incoming Noise Removal

Supported on 9861 and 9871.

Audio Enhancement

The 9861 and 9871 can enhance lower-fidelity narrowband audio toward wideband audio during supported calls.

Language AI

Supported functionality can include:

• Live captions
• Real-time dialogue transcription
• Webex in-meeting summaries
• Highlighted meeting action items

Availability depends on model, platform, and deployment.

Action Button

Every Cisco Desk Phone 9800 Series model includes a customizable Action Button.

Possible uses include:

• Emergency alerts
• Security notifications
• Broadcasts
• Paging
• Calling predefined destinations
• Triggering web applications
• Launching multiple configured actions from one button

Cisco supports configuration of up to three scenarios on the Action Button.

Wi-Fi

Available on radio-enabled Cisco 9861 and 9871 models.

• Dual-band 2.4 GHz / 5 GHz
• IEEE 802.11a/b/g/n/ac
• WPA
• WPA2
• WPA3
• Enterprise authentication support
• EAP-FAST
• PEAP
• EAP-TLS
• Wi-Fi Multimedia support

Bluetooth

Available on radio-enabled Cisco 9861 and 9871 models.

• Bluetooth 5.2
• Bluetooth Low Energy
• Bluetooth Class 1
• HFP
• A2DP
• HID
• PBAP
• Wideband and narrowband codec support

Connectivity

Cisco 9811

• 10/100BASE-T Ethernet
• Internal 2-port Ethernet switch

Cisco 9841 / 9851 / 9861 / 9871

• 10/100/1000BASE-T Gigabit Ethernet
• Internal 2-port Ethernet switch

A computer can share the phone’s network connection through the integrated Ethernet switch, while separate VLANs can be configured for voice and data traffic.

Network Features

• SIP
• SDP
• IPv4
• IPv6
• DHCP
• Static IP configuration
• DNS
• HTTPS
• TFTP
• RTP
• RTCP
• VLAN
• Cisco Discovery Protocol
• LLDP
• LLDP-MED
• 802.1X
• ICE
• NAT
• STUN

Security

• Secure Boot
• Device authentication
• Image authentication
• Configuration-file authentication
• Configuration-file encryption
• Secure credential storage
• Secure Unique Device Identifier
• TLS signaling encryption
• TLS 1.3
• SRTP media encryption
• HTTPS
• 802.1X
• Secure erase
• On-device firewall support
• Security-Enhanced Linux
• Trusted Platform Module 2.0 on applicable models
• FIPS compliance support

Power

• Cisco 9811: IEEE PoE Class 2
• Cisco 9841: IEEE PoE Class 2
• Cisco 9851: IEEE PoE Class 3
• Cisco 9861: IEEE PoE Class 3
• Cisco 9871: IEEE PoE Class 3
• Input rating: 0.42 A, 48 V DC
• Optional Cisco Power Adapter 3 supported for applicable configurations

Cisco 9800 Key Expansion Module

The optional Cisco Desk Phone 9800 Key Expansion Module (KEM) provides additional programmable controls for users who manage a high volume of calls.

Key Specifications

• 5-inch color LCD
• Resolution: 480 × 800
• 20 physical line keys
• Two pages
• USB connectivity
• Dimensions: 226 × 126 × 48.5 mm
• Weight: 483 g

Compatibility

• Cisco 9851: supports one KEM
• Cisco 9861: supports KEM expansion
• Cisco 9871: supports KEM expansion
• The 9861 and 9871 can support up to three KEMs when powered using the appropriate Cisco Power Adapter configuration.

Supported Platforms

• Cisco Webex Calling
• Cisco Unified Communications Manager
• Webex Dedicated Instance
• Cisco BroadWorks
• Microsoft SIP Gateway
• Asterisk

Cisco lists these platforms as tested, certified, or compatible depending on the platform. The 9811 requires UCM 14 or above, while the other 9800 Series models support UCM 12.5 or above, subject to Cisco’s device-package requirements.

Sustainability

• More than 77% post-consumer recycled material on the 9811
• More than 74% post-consumer recycled material on the 9841, 9851, 9861, and 9871
• 100% recyclable packaging
• Display-off functionality
• Deep-sleep modes
• Smart power features
• Carbon-emission insights and reporting support
• Cisco equipment takeback program

Accessibility

• Hearing Aid Compatible handset
• Voice Feedback
• Adjustable font sizes
• Adjustable volume
• Visual status indicators
• Voice navigation assistance
• ADA-compliant dial pad

Voice Feedback is supported in selected languages including English, French, Italian, German, and Spanish.

Language Support

The Cisco Desk Phone 9800 Series supports numerous localized languages, including:

• Arabic
• English
• Hebrew
• French
• German
• Spanish
• Italian
• Turkish
• Portuguese
• Russian
• Chinese
• Japanese
• Korean
• Dutch
• Greek
• Polish
• Ukrainian
• And additional languages

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

Product Numbers

• DP-9811-K9= – Cisco Desk Phone 9811, Carbon Black
• DP-9841-K9= – Cisco Desk Phone 9841, Carbon Black
• DP-9841-L-K9= – Cisco Desk Phone 9841, First Light

Additional configurations and regional SKUs are available depending on the selected model and deployment.

Ideal For

• Corporate offices
• Enterprise workplaces
• Hybrid work environments
• Shared desks
• Hot-desking environments
• Executive offices
• Customer-service teams
• Reception and administration
• Call-intensive users
• Webex Calling deployments
• Cisco Unified Communications environments
• Organizations modernizing legacy desk-phone deployments

Key Selling Point

A modern enterprise desk-phone family combining secure business calling, advanced Cisco audio, Webex collaboration, workplace reservation capabilities, AI-powered communication features, and flexible deployment across cloud and on-premises calling platforms.