Cisco CP-8861-K9 High-Capacity Executive Wideband VoIP Voice Desk Phone Full English Product Description

Listing Title

Cisco CP-8861-K9 Enterprise Top-Tier Gigabit Voice-Only IP Desk Phone (Charcoal Chassis), 5-inch WVGA 800×480 Color Touch LCD, Bluetooth 3.0 EDR Class 1, Cisco Intelligent Proximity Mobile Integration, Up To Three Key Expansion Module (KEM) Support, Dual Gigabit Ethernet Switch, IEEE 802.3af Class 4 PoE+, Dual USB Ports, Wideband G.722 HD Audio, Full-Duplex Echo-Canceling Speakerphone, RJ-9 Wired Headset Port, External Audio I/O Support, Replaceable Black/Silver Bezel, Wall-Mountable, Dual SCCP / MPP SIP Firmware, CUCM / Webex Calling / Third-Party Global SIP PBX Compatible, Designed For Enterprise Executives, Department Directors, High-Volume Call Center Supervisors, Multi-Branch Global Enterprise Voice Collaboration Deployments

Full Commercial Overview

The Cisco CP-8861-K9 is Cisco’s flagship high-capacity voice-only executive desk endpoint within the premium 8800 Series Unified IP Phone portfolio, built for top-tier enterprise leaders, multi-site supervisors, and heavy-call-volume operations teams across multinational global enterprise environments. It delivers the maximum multi-line scalability of the entire 8800 product line while retaining all premium enterprise voice collaboration features, wideband HD audio, wireless Bluetooth connectivity, and Cisco Intelligent Proximity mobile-desk call integration technology.

This voice-only executive desk phone supports two interchangeable firmware platforms for flexible worldwide cross-border deployment:

1. SCCP (Skinny Client Control Protocol): Native on-premises Cisco Unified Communications Manager (CUCM) multi-region enterprise deployments.
2. MPP Multiplatform Phone (MPP) SIP Firmware: Cloud UCaaS platforms including Webex Calling, plus third-party hosted global SIP PBX systems like Broadsoft.

Core Hardware & Feature Differentiators vs Other 8800 Series Models

1. Maximum Key Expansion Module (KEM) scalability in the 8800 series: Supports up to three separate Cisco 8800 Series Audio Key Expansion Modules; each KEM adds 28 programmable line/feature keys, expanding the base 5 line keys to a maximum of 109 total programmable buttons for supervisors managing dozens of cross-region extension lines, BLF presence monitoring, speed dial shortcuts, and call park monitoring. The CP-8851-K9 only supports up to two KEMs, while mid/lower-tier models (8811, 8841, 8845) have no KEM support at allCisco.
2. Voice-only design with no integrated HD video camera: Distinct from the video-enabled CP-8845-K9 and CP-8865-K9 models; optimized for pure high-volume executive voice workflows without desktop video conferencing requirementsCisco.
3. Built-in Bluetooth 3.0 EDR Class 1 (10m / 30ft range): Supports HFP hands-free calling, A2DP audio streaming, and PBAP mobile contact synchronization via Cisco Intelligent Proximity technology, which seamlessly transfers active mobile call audio between paired smartphones and the desk phone’s handset/speakerphone, and syncs mobile device contact lists to the desk phone’s local directory. This wireless Bluetooth feature is absent on entry-level non-Bluetooth 8800-series models (8811, 8841)Cisco.
4. Exclusive external audio input/output support: Unique to the CP-8861-K9; enables connection of external desktop microphones and amplified speakers for large executive office ad-hoc conference calls, a capability unavailable on all other 8800-series desk phonesCisco.
5. IEEE 802.3af Class 4 PoE+ higher-power rating: Delivers a sufficient power budget to fully operate three attached KEM modules, dual USB peripherals, Bluetooth radio, and external audio accessories simultaneously without external power adapters for PoE+-enabled switch infrastructures. Mid-tier CP-8851-K9 also uses Class 4 PoE, while lower-tier models rely on lower Class 2 PoE power budgets that cannot support multiple expansion modules and USB peripherals simultaneouslyCisco.
6. Dual USB 2.0 Type-A peripheral ports (front side + rear back panel): The rear USB port supports fast charging up to 2.1A / 10.5W for mobile devices and tablets, while the side USB port delivers standard 500mA charging and peripheral connectivity for USB headsets, diagnostic tools, and configuration backup accessories. The CP-8851-K9 also includes dual USB ports, while mid/lower-tier models carry only a single USB port or none at allWebex.
7. 5-inch full-color 800×480 WVGA touchscreen LCD: Identical high-resolution display specification to the CP-8845-K9 and CP-8851-K9 models, rendering full-color caller ID, real-time call timers, LDAP corporate directories, XML enterprise application dashboards, and customizable desktop wallpapers with multi-language global UI support including right-to-left Arabic/Hebrew rendering.
8. Dual-port Gigabit Ethernet integrated switch: 1Gbps uplink to corporate LAN access switches + secondary PC passthrough port, eliminating separate desktop Ethernet wall jacks for executive workstation deployments, shared across all 8800-series models.
9. Replaceable cosmetic bezels: Standard factory charcoal gray chassis finish (CP-8861-K9); optional silver bezel sold separately for matching light-toned executive office interior designs; white chassis variant available as CP-8861-W-K9.

Hardware & Physical Design Architecture

1. Chassis, Mounting & Mechanical Specifications

• Form Factor: Ergonomic premium executive desk phone chassis with dual-position adjustable foot stand (35° / 50° viewing angles); foot stand removable for wall-mount conversion using optional separate wall-mount bracket accessory.
• Chassis Construction: Lead-free, RoHS-compliant textured ABS polycarbonate plastic (cosmetic Class A); standard factory charcoal gray chassis finish, optional silver replacement cosmetic bezel sold separately.
• Physical Dimensions (Chassis without foot stand): H × W × D = 229.1 × 257.34 × 40 mm (9.01 × 10.13 × 1.57 inches).
• Total Unit Weight (Including handset and coiled cord): ~1.81 kg (4 lbs).
• Physical Security: Integrated Kensington lock slot on rear chassis for anti-theft protection in shared open-plan global executive office spaces.
• Operating Environmental Limits (Indoor Commercial Global Office Use Only): Operating Temperature: 0°C ~ +40°C (32°F ~ 104°F) Storage Temperature Shock Tolerance: -10°C ~ +60°C (14°F ~ 140°F) Operating Humidity: 10% – 90% non-condensing Storage Humidity: 10% – 95% non-condensing.

2. Front Panel UI, Display & Key Layout

1. 5-inch widescreen backlit color WVGA LCD Touch Panel: Native resolution 800 × 480 pixels, touchscreen-capable graphical interface, adjustable backlight brightness and power-saving timeout profiles. Screen renders full-color caller ID, active multi-line call status icons, real-time call timers, missed call alert banners, voicemail MWI notification graphics, centralized LDAPv3 global corporate directory search results, persistent local call history logs, customizable desktop background wallpapers, XML enterprise business application dashboards, synchronized SNTP system clock, PoE+ power draw metrics and installed firmware version information. Supports over 35 global multi-language UI character sets including right-to-left Arabic/Hebrew rendering for international markets.
2. Four context-sensitive dynamic softkeys: Function labels update in real time on the color display for core call workflows including Hold, Redial, DND, Directory, Applications and multi-party conference bridge control shortcuts.
3. Five-way circular navigation cluster with central Select button: Primary control for scrolling LDAP directory entries, call history logs, device audio/network configuration menus and XML enterprise application interfaces.
4. Five vertical programmable line keys (left side of display): Each paired with tri-color LED status indicator (green = idle line, orange = incoming ringing, red = active/held call). Keys remotely configurable via CUCM/SIP PBX admin portal for multi-DN extensions, BLF presence monitoring, speed dial, call park, intercom auto-answer and custom XML application one-touch launch shortcuts, with multi-call-per-line functionality supporting multiple concurrent inbound/outbound calls per line key.
5. Dedicated fixed-function hard key bank (bottom UI panel):
   • Applications: One-touch access to XML enterprise apps, global phone settings, display wallpapers and UI preference configurations.
   • Messages: Direct portal shortcut to Cisco Unity / Unity Connection voicemail servers, visual MWI alert trigger.
   • Directory: Instant access to centralized global LDAP corporate employee contact lookup and local personal address book storage (supports Bluetooth-synced mobile phone contact lists).
   • Hold/Resume, Transfer, Conference: Core enterprise calling feature one-touch shortcuts.
   • Speakerphone, Mute: Audio path selection controls with integrated LED status indicators.
   • Volume rocker: Independent up/down adjustment for handset receiver audio gain during active calls and ringtone alert volume in idle standby mode.
   • Redial, End Call: Quick call termination and last-number automatic redial shortcuts.
6. Ergonomic handset & coiled replaceable cord: HAC hearing-aid compatible acoustic handset with adaptive background noise suppression; handset top LED strip provides visual incoming call ringing and unread voicemail MWI alert notifications when resting in the chassis cradle.

3. Wideband Audio Subsystem & Supported Voice Codecs

• Handset Receiver: Wideband acoustic driver with adaptive background noise suppression, fully TTY/TDD teletype device compatible for global accessibility compliance.
• Full-Duplex Desktop Speakerphone: Built-in omnidirectional microphone with advanced digital adaptive acoustic echo cancellation and dynamic ambient noise reduction, engineered for small-group desktop ad-hoc conference calls in noisy open-plan multinational executive office environments.
• Exclusive External Audio I/O Support (Unique To CP-8861-K9): Dedicated auxiliary audio input/output jacks enabling connection of external desktop microphones and amplified conference speakers for large executive office meeting audio deploymentsCisco.
• Headset Interfaces:
  1. Standard RJ-9 modular wired headset port on rear chassis; certified compatible with Cisco and third-party enterprise wired office headsets.
  2. Integrated Bluetooth 3.0 EDR wireless radio (Class 1, 10m range) for pairing with Bluetooth wireless headsets, Bluetooth earpieces, and user smartphones; supports HFP hands-free calling and A2DP audio streaming profiles.
• Supported VoIP Audio Codecs (SCCP / MPP SIP dual firmware): Wideband HD Voice Codecs: G.722 (16kHz sampling rate, TIA 920 wideband audio compliant), AMR-WB, Opus low-latency wideband codec optimized for cross-border hybrid remote conference links Narrowband Codecs: G.711a-law, G.711u-law, G.729a low-bitrate compression codec, G.729ab comfort noise optimized codec, G.726, iLBC internet low-bitrate speech codec for lossy remote cross-border WAN branch office links, iSAC adaptive wideband codecCisco.
• Audio Optimization Feature Suite: Voice Activity Detection (VAD), Comfort Noise Generation (CNG), silence suppression, adaptive full-duplex echo cancellation, dynamic automatic gain control, intelligent packet loss concealment to mitigate audio stuttering on unstable cross-border office LAN/WAN links, RF interference filtering to eliminate audio buzz from nearby mobile devices and wireless access points.

Network, Power & Rear Chassis Hardware Interfaces

1. Dual Gigabit Ethernet Integrated Switch Subsystem

Two independent auto-sensing Gigabit RJ45 ports (10/100/1000 Mbps full/half duplex):

1. Network Uplink Port: Connects to corporate LAN access switch, fully supports IEEE 802.3af Class 4 PoE+ power delivery over Ethernet cabling.
2. PC Passthrough Port: Secondary LAN output for direct connection to end-user desktop PC or laptop, eliminating the requirement for a separate wall-mounted Ethernet jack at each global branch executive workstation. Supported Network & QoS Standards: IPv4 only (IPv6 protocol unsupported), Cisco Discovery Protocol (CDP), LLDP-PoE power negotiation, 802.1Q tagged voice VLANs, IEEE 802.1p Layer 2 QoS traffic prioritization, DSCP differentiated services marking for voice media packets, STUN NAT traversal for remote cross-border worker home office deployments, SNTP synchronized network time, TFTP/HTTP/HTTPS zero-touch auto-provisioning for bulk multinational enterprise desk phone fleet deployments.

2. Power Supply Architecture (Two Global Deployment Modes)

1. Primary Power: IEEE 802.3af Class 4 PoE+ (Standard Global Enterprise Deployments)Regulated 48V DC power drawn over the uplink Ethernet cable from compliant PoE+ LAN switches; Class 4 higher-power rating delivers a sufficient power budget to fully operate three attached Key Expansion Module (KEM) units, dual USB peripherals, Bluetooth radio, and external audio I/O accessories simultaneously without external power adapters. Fully backward compatible with both 802.3af and 802.3at PoE+ switch hardware via CDP/LLDP-PoE automatic power negotiationCisco.
2. Secondary Backup Power Option: Optional External 48V DC Power Cube 4 AC AdapterFor non-PoE global network environments where PoE+-capable access switches are unavailable; power cube sold separately as an accessory (not included standard with base CP-8861-K9 unit). Universal regional AC wall power clip adapters (EU, UK, AU, CN, JP, etc.) sold separately for worldwide mains voltage compliance.

• Power Efficiency Compliance: Cisco EnergyWise energy management framework support, automatically reducing LCD backlight brightness and entering low-power idle sleep mode during off-hours to cut global office electricity consumption and carbon footprint; Energy Star certified low-power efficiency rating.

3. Rear Chassis Hardware Interface Layout

1. Gigabit Ethernet Network Uplink RJ45 Port (PoE+ capable)
2. Gigabit Ethernet PC Passthrough RJ45 Port
3. RJ-9 Modular Wired Headset Port
4. Handset Coiled Cord Modular Jack
5. DC Power Input Barrel Jack (for optional external 48V power cube adapter)
6. Dual USB 2.0 Type-A Ports: Front-side low-power USB (500mA standard charging/peripherals); Rear high-power USB (2.1A fast charging for mobile devices/tablets)
7. Exclusive External Audio Auxiliary Input/Output Jacks (Unique To CP-8861-K9)
8. Kensington Physical Security Anti-Theft Lock Slot
9. Wall-mount bracket mounting point screw holes
10. Passive ventilation cooling slots (fanless silent design for quiet global executive office environments).

Core Telephony, UC & Global Enterprise Feature Set

All voice calling, directory lookup and network configuration parameters are centrally provisioned via Cisco Unified Communications Manager (SCCP firmware) or third-party SIP PBX / Webex Calling cloud UC platforms (MPP multi-platform SIP firmware). Limited end-user customizable local settings (ringtones, display brightness, speaker volume presets, Bluetooth pairing management) are configurable via the on-device color LCD menu system without enterprise IT administrator intervention.

1. Multi-Line Multi-Call Voice Call Handling Supports up to five independent directory number (DN) line appearances, multi-call-per-line functionality enabling multiple concurrent active/incoming voice calls per line key plus native call waiting alerting for new inbound calls during existing active conversations. Supported core enterprise call handling functions: supervised consultative call transfer, blind unsupervised transfer, three-way ad-hoc audio conference calling, call hold/resume, one-touch mute, call park, directed/group call pickup, all-condition call forwarding (unconditional / busy line / no-answer timeout), Do Not Disturb (DND) mode, Caller ID name/number full-color display for all inbound ringing voice calls, automatic last-number redial, pre-dial number editing before call initiation, intercom auto-answer for internal cross-department peer communications across multi-region global enterprise networks. Supplementary advanced enterprise telephony features include MLPP multilevel precedence and preemption, barge/cbarge intrusive call monitoring, meet-me conference bridges, malicious caller ID logging, eight customizable speed-dial hotkeys mapped to line key programmable functions.
2. Directory & Call Log Productivity Features Wireless LAN network access to centralized LDAPv3 global corporate employee directory servers with real-time multi-language search functionality via the color LCD screen; local persistent flash memory storage for three distinct call log categories: all dialed outgoing voice calls, all received answered incoming calls, all missed/unanswered ringing calls. All log entries store full Caller ID metadata, precise synchronized cross-border call timestamps and total call duration data, with one-touch callback capability for every logged entry. Local personal address book storage for custom user speed dial conference bridge access numbers and internal cross-region extension contacts, Bluetooth-synced mobile device contact list synchronization, reverse number lookup for unknown inbound callers.
3. Voicemail Message Waiting Indicator (MWI) Integration Native SCCP/SIP MWI notification synchronization with Cisco Unity / Unity Connection voicemail servers or third-party hosted voice mail platforms for global multi-region enterprise deployments; persistent visual MWI alert banners displayed prominently on the color LCD screen, plus illuminated handset LED strip notification when unheard voicemail messages exist. Dedicated Messages hard key provides instant portal access to voicemail message playback, message deletion and personalized voicemail greeting configuration.
4. Bluetooth & Cisco Intelligent Proximity Exclusive Features

• Bluetooth 3.0 EDR pairing with wireless headsets, Bluetooth earpieces, and user smartphones; supports HFP hands-free calling and A2DP audio streaming profiles.
• Cisco Intelligent Proximity technology: Automatically detects paired mobile phones within proximity of the desk phone, seamlessly transfers active mobile call audio between the smartphone and the desk phone’s high-quality handset/speakerphone, and synchronizes mobile device contact lists to the desk phone’s local directory.

1. Maximum Key Expansion Module (KEM) Global Scalability Exclusive Feature Supports connection of up to three Cisco IP Phone 8800 Series Key Expansion Modules (KEMs); each KEM adds up to 28 programmable line/feature keys, expanding the base 5 line keys to a maximum of 109 total programmable buttons for high-volume global supervisors managing dozens of cross-region extension lines, BLF presence monitoring, speed dial shortcuts, and call park monitoring. This three-KEM scalability is the highest available within the entire Cisco 8800 Series IP Phone product lineupCisco.
2. User-Customizable Local Device Settings Multiple pre-built user operation profiles enabling instant one-touch switching of ringtone sets, ring volume alert levels, notification tone schemes, LCD backlight timeout durations, and audio volume presets optimized for different global workplace environments (quiet private executive offices, busy open-plan cross-regional workspaces). End users can adjust display contrast, font size, screen wallpaper backgrounds, keypad lock PIN security codes, LDAP directory search filter preferences, Bluetooth device pairing and unpairing management, USB peripheral power management, external audio I/O configuration, and local audio settings directly via the on-device menu system without CUCM/PBX administrator privileges. Full accessibility configuration menu including voice feedback navigation, adjustable audio pitch, TTY/TDD teletype support, and HAC handset audio tuning for hearing-impaired global users.
3. Enterprise-Grade Global Security Feature Suite End-to-end encrypted voice communications stack: TLS transport layer encryption for all SCCP/SIP call setup, control and configuration signaling traffic between the desk phone and CUCM/SIP PBX global server infrastructure; SRTP AES encrypted RTP wideband/narrowband voice media streams to prevent unauthorized cross-border office LAN packet sniffing and confidential executive boardroom voice conference conversation interception. CAPF certificate authority proxy automatic device certificate provisioning for TLS/SRTP security enforcement; secure boot firmware integrity validation, SHA-256 cryptographic certificate signature verification; all local device configuration files, stored Bluetooth device pairing credentials and contact directory data stored encrypted at rest in internal flash memory to prevent sensitive credential exposure if the desk phone is physically compromised. Dual-tier access restriction architecture: administrator-level locked network provisioning and CUCM registration configuration menus (protected by admin PIN code, editable only by global enterprise IT staff), and end-user-accessible local device setting menus configurable by office workers without administrator credentials. Password-locked factory reset function prevents unauthorized full device configuration erasure if the phone is lost or stolen, requiring the administrator PIN code to execute a complete factory default wipe.
4. XML Extensible Markup Language Enterprise Application Support The color TFT LCD touchscreen renders custom XML enterprise web applications hosted on corporate internal global TFTP/HTTP/HTTPS servers, enabling global office executives and department supervisors to access real-time business data directly on their voice desk phone without a separate PC or tablet device. Supported XML global enterprise use cases: corporate cross-region meeting room booking schedules, building facility emergency contact lists for worldwide campus locations, internal company multi-language cross-border announcement feeds, multi-location conference bridge access code directories, healthcare facility patient care team cross-region contact lists, campus maintenance global work order dashboards and real-time manufacturing multi-site production line status dashboards. Cisco Compatible Extensions (CCX) compliance ensures standardized XML application interoperability across Cisco global enterprise unified communications infrastructure.

Remote Device Management & Centralized Global Administration Tools

1. Zero-Touch Centralized TFTP Auto-Provisioning & Unattended Firmware Upgrades Fully automated remote bulk device configuration deployment and firmware image upgrade management via standard TFTP/HTTP/HTTPS server infrastructure integrated with CUCM or third-party SIP PBX global platform deployments. The CP-8861-K9 automatically retrieves its unique device configuration file, network VLAN profiles, LDAP directory multi-region server addresses, XML application definitions and latest firmware version upon every power-on boot cycle without manual on-site global IT intervention. Two interchangeable firmware load variants supported via centralized global upgrade workflows: SCCP firmware for CUCM on-premises multi-region deployments, and Multiplatform Phone (MPP) SIP firmware for Webex Calling and third-party hosted SIP PBX worldwide cloud environments.
2. Centralized Enterprise Global Device Real-Time Monitoring & Call Session Audit Logging Full device real-time status tracking available within the CUCM administrative management console or third-party SIP PBX global management dashboards, including desk phone online/offline registration state, active line voice call status, LAN switch access point association information, PoE+ power draw metrics, remaining flash memory storage capacity, installed firmware version number, Bluetooth paired device count, attached KEM module quantity, external audio I/O connection status, and historical cross-border conference call session audit logging for complete enterprise voice communications traceability and global IT troubleshooting. Built-in on-device network diagnostic tools include LAN wired signal strength scanning and ping utility testing to validate global office LAN/WAN connectivity and CUCM/SIP PBX global server reachability for on-site regional IT troubleshooting teams. An embedded local HTTPS web server on the desk phone enables remote off-site cross-region access to device status statistics and read-only configuration data for centralized global monitoring without physical on-site access to the desk phone unit.
3. Mass Global Fleet Configuration & Troubleshooting Utilities Centralized bulk configuration export/import functionality for consistent standardized phone settings deployment across hundreds or thousands of global enterprise meeting room desk phone fleets distributed across EMEA, APAC, Latin America and North America; remote packet capture diagnostic tool for capturing local LAN voice/media and signaling packets to diagnose audio quality and cross-border registration connectivity issues; problem reporting tool (PRT) for generating standardized device diagnostic log bundles to submit to Cisco global TAC technical support for hardware/firmware fault resolution.

Environmental & Global Regulatory Compliance Certifications

• Electromagnetic Interference Compliance: FCC Part 15 Class B, CE EMC Directive, AS/NZS CISPR22 Class B, ICES-003 Class B, VCCI Class B, KN22 Class B, CNS13438 Class B (full global multi-region EMC certification suite)
• Electrical Safety Certifications: UL / C-UL 60950 Second Edition, EN 60950 Second Edition (A11 amendment), IEC 60950 Second Edition, CSA C22.2 No. 60950, AS/NZS 60950, GB4943 China national electrical safety standard (universal worldwide safety certification)
• Telecommunications Regulatory Approvals: FCC Part 68 telephony terminal device certification, TIA 810A HAC hearing-aid compatibility standard, TIA 920 wideband HD audio compliance
• Bluetooth Radio Compliance: FCC Part 15 Subpart C, CE RED Directive, IC RSS-247
• Material Compliance: Lead-free construction materials, RoHS hazardous substance compliance for commercial enterprise worldwide deployments
• Lifecycle Status: Actively supported global enterprise voice collaboration product (not EOL as of 2026); Cisco continues to release periodic critical security vulnerability and severe bug-fix maintenance firmware updates; limited new feature firmware development prioritized for upper-tier global executive collaboration platforms.
• Standard Warranty: One-year limited Cisco hardware warranty covering manufacturing defects in the desk phone chassis, internal audio components, LCD display panel, Bluetooth radio module, external audio I/O circuitry and internal electronic components, valid for commercial enterprise worldwide global deployments across all international regions.

Key Specification Bullet Points

• Model Number: Cisco CP-8861-K9 (Worldwide Global Premium Executive Voice-Only Gigabit IP Desk Phone, Charcoal Chassis, Bluetooth Radio, Maximum 3-KEM Scalability, Exclusive External Audio I/O)
• Alternate White Chassis Variant: CP-8861-W-K9
• Equivalent Lower-Scalability Bluetooth Model: CP-8851-K9 (Max 2 KEMs, No External Audio I/O)
• Video-Enabled Equivalent Model: CP-8865-K9 (Integrated HD Video Camera, Same KEM/Bluetooth Specs)
• Device Type: Global Enterprise Top-Tier Gigabit SIP/SCCP Unified HD Wideband VoIP Voice-Only Executive Desk Phone (8800 Series Premium Flagship Model, No Integrated Video Camera)
• Supported Telephony Firmware Protocols:
  1. SCCP (Skinny Client Control Protocol): Native CUCM On-Premises Global Multi-Region Deployment
  2. MPP Multiplatform SIP: Webex Calling, Broadsoft, Third-Party Hosted Global SIP PBX Cloud Platforms
• Display: 5-inch Backlit Color Widescreen WVGA Touch LCD, Native 800 × 480 Resolution, Adjustable Backlight Timeout Power-Saving Modes, Multi-Language Right-to-Left Global UI Rendering, XML Enterprise Application Full-Color Rendering Support
• Wireless Connectivity: Built-In Bluetooth 3.0 EDR Class 1 (10m / 30ft Range), HFP / A2DP / PBAP Profiles For Wireless Headsets & Mobile Device Contact Sync; Cisco Intelligent Proximity Mobile Call Audio Transfer Technology
• Unique Exclusive Hardware Feature: Dedicated External Audio Auxiliary Input/Output Jacks For External Conference Microphones & Amplified Speakers (Only Available On CP-8861-K9 Within The 8800 Series)
• Scalability Hardware Support: Compatible With Up To Three Optional Cisco 8800 Series Key Expansion Modules (KEM), Maximum 109 Total Programmable Line/Feature Keys (Highest KEM Capacity In The Entire 8800 Series Product Line)
• Line & Programmable Key Layout: 5 Independent Directory Number Base Line Keys (Tri-Color LED Status Indicators), 4 Context-Sensitive Softkeys, Five-Way Navigation Cluster with Central Select Button, Dedicated Fixed-Function UC Hard Keys (Messages, Directory, Applications, Hold, Transfer, Conference, Speakerphone, Mute, Volume, Redial, End Call)
• Audio Subsystem: Wideband G.722 HD Voice Support, Full-Duplex Digital Echo-Canceling Desktop Speakerphone, HAC Hearing-Aid Compatible Handset, TTY/TDD Teletype Accessibility Support, RJ-9 Modular Wired Headset Port + Bluetooth Wireless Headset Pairing Support + Exclusive External Aux Audio I/O Ports
• Ethernet Network Interfaces: Dual Independent 10/100/1000 Mbps Gigabit RJ45 Ports (LAN Uplink PoE+ Capable + PC Passthrough Secondary Port), Auto-Sensing Full/Half Duplex
• PoE Power Specification: IEEE 802.3af Class 4 PoE+ (Primary Power Source, Standard Global Enterprise Deployments), Compatible with 802.3af / 802.3at PoE+ LAN Switches via CDP/LLDP-PoE Power Negotiation
• Secondary Power Option: Optional Separate 48V DC Power Cube 4 AC Adapter (Not Included Standard with CP-8861-K9 Unit); Universal Regional AC Wall Power Clip Accessories Sold Separately For Worldwide Mains Voltage Compliance
• Power Efficiency: Cisco EnergyWise Energy Management Framework, Energy Star Certified Low-Power Idle Mode
• Physical Mounting Options: Standard Desktop Dual-Position Adjustable Tilt Base Stand, Optional Separate Wall-Mount Conversion Bracket Accessory Sold Separately
• Physical Security: Integrated Kensington Anti-Theft Lock Slot on Rear Chassis
• Peripheral Interfaces: Dual USB 2.0 Type-A Ports (Front-Side Low-Power 500mA Standard Charging/Peripherals; Rear High-Power 2.1A Fast Charging For Mobile Devices & Tablets)
• Supported QoS & Networking Standards: IPv4 Only, CDP, LLDP-PoE, 802.1Q Voice VLAN Tagging, 802.1p Layer 2 QoS Prioritization, DSCP Differentiated Services Marking, QBSS Load Balancing, STUN NAT Traversal, SNTP Network Time Synchronization, TFTP/HTTP/HTTPS Zero-Touch Auto-Provisioning & Bulk Global Firmware Upgrades
• Enterprise Global Security Features: TLS Transport Layer Encryption For SCCP/SIP Call Signaling, SRTP AES Encrypted Wideband/Narrowband Voice Media Streams, Secure Boot Firmware Integrity Validation, SHA-256 Cryptographic Certificate Validation, CAPF Automatic Device Certificate Provisioning, Encrypted Local Stored Credentials & Configuration Data, Dual-Tier Admin/User PIN Access Restrictions, Password-Locked Factory Reset Function
• Core Unified Communications Global Voice Call Features: Up to 5 Independent DN Base Line Appearances, Multi-Call-Per-Line with Call Waiting, Blind/Consultative Call Transfer, Three-Way Wideband Audio Conference Bridge, Hold/Resume, One-Touch Global Mute, Call Park, Directed/Group Call Pickup, All-Condition Call Forward (Unconditional/Busy/No Answer), DND Do Not Disturb Mode, Caller ID Name/Number Full-Color Global Display, Auto Redial, Pre-Dial Number Editing, Intercom Auto-Answer, 8 Custom Speed-Dial Hotkeys, MLPP Multilevel Precedence & Preemption, Barge/CBarge Intrusive Call, Meet-Me Conference Bridges, Malicious Caller ID Logging, Cisco Intelligent Proximity Mobile Phone Call Audio Transfer & Contact Sync, Bluetooth Wireless Headset Pairing Management, Multiple Customizable User Ringtone/Alert Profiles, Keypad Lock PIN Security, XML Custom Enterprise Global Business Application Rendering (CCX Compliant), Up To Three Key Expansion Module (KEM) Support For Maximum 109 Programmable Feature/Line Keys, Exclusive External Auxiliary Audio I/O Support For External Conference Microphones & Amplified Speakers (No Wireless DECT Microphone Support)
• Productivity & Directory Global Features: Network LDAPv3 Corporate Multi-Region Employee Directory Real-Time Multi-Language Search, Local Persistent Flash Memory Call Log Storage (Dialed Outgoing / Received Answered / Missed Incoming Global Conference Calls), Bluetooth-Synced Mobile Contact List Storage, One-Touch Voicemail MWI Access Portal
• Centralized Global Management & Admin Tools: TFTP Zero-Touch Auto-Provisioning & Remote Bulk Global Firmware Upgrades, CUCM / SIP PBX Central Real-Time Device Status Monitoring & Call Session Syslog Global Audit Logging, On-Board LAN Ping Diagnostic Utility, Embedded Local HTTPS Web Administration Server, Remote Packet Capture Diagnostic Tool, PRT Problem Reporting Log Generation Utility
• Target Global Deployment Scenarios: Multinational enterprise department directors, global executive managers, cross-region multi-branch supervisors, high-volume global call center team leaders, small-to-medium business (SMB) open-plan and private executive office deployments across EMEA, APAC, Latin America and North America, distributed multi-region branch office voice desk phone fleets, organizations running Cisco CUCM on-premises unified communications infrastructure, Webex Calling cloud UC subscribers, third-party hosted SIP PBX global cloud platforms (Broadsoft), network environments standardized on IEEE 802.3af Class 4 PoE+ LAN switches, global IT teams prioritizing flagship high-capacity executive voice-only VoIP desk phones with maximum three-KEM multi-line scalability, built-in Bluetooth radio for wireless headsets and Cisco Intelligent Proximity mobile-desk call integration, exclusive external auxiliary audio I/O for large executive office conference audio setups, color touch LCD wideband HD audio, dual-protocol SCCP/SIP flexibility, dual USB peripheral ports and robust enterprise TLS/AES encrypted voice communications security for worldwide cross-border enterprise executive and high-volume supervisor office fleets.
• Lifecycle Status: Actively Supported Commercial Enterprise Global Voice Collaboration Hardware, Regular Critical Security & Bug-Fix Maintenance Firmware Releases Available
• Standard Warranty: One-Year Limited Cisco Worldwide Commercial Enterprise Hardware Warranty Valid Across All Global International Regions

Model Quick Reference

The Cisco CP-8861-K9 is Cisco’s flagship premium high-capacity voice-only executive desk phone within Cisco’s 8800 Series Unified IP Phone portfolio, supporting dual SCCP/SIP firmware for both on-prem CUCM multi-region global deployments and cloud Webex Calling / third-party SIP PBX worldwide cloud platforms.

Defining Hardware & Feature Differences Between CP-8861-K9 and Other 8800 Series Models

1. Maximum Key Expansion Module (KEM) scalability – primary flagship differentiator: The CP-8861-K9 supports up to three separate 8800-series KEM expansion modules (max 109 programmable line/feature keys). The CP-8851-K9 only supports two KEMs (max 77 keys), while all mid/lower-tier models (8811, 8841, 8845) have no KEM expansion support at allCisco.
2. Exclusive external auxiliary audio input/output jacks: Unique hardware feature only available on the CP-8861-K9, enabling connection of external desktop conference microphones and amplified speakers for large executive office meeting audio deployments; all other 8800-series desk phones lack this external audio I/O capabilityCisco.
3. Voice-only design with no integrated HD video camera: Distinguished from the video-enabled CP-8845-K9 and CP-8865-K9 flagship models, optimized for pure high-volume executive voice workflows without desktop video conferencing requirements.
4. Built-in Bluetooth 3.0 EDR Class 1 wireless radio: Supports wireless headsets and Cisco Intelligent Proximity mobile-phone call integration technology that syncs smartphone contact lists and transfers active mobile call audio between paired mobile devices and the desk phone’s handset/speakerphone. This Bluetooth wireless functionality is absent on non-Bluetooth entry-level models (8811, 8841).
5. IEEE 802.3af Class 4 PoE+ higher-power rating: Delivers a sufficient power budget to fully operate three attached KEM expansion modules, dual USB peripherals, Bluetooth radio, and external auxiliary audio I/O accessories simultaneously without external power adapters for PoE+-enabled switch infrastructures. The CP-8851-K9 also uses Class 4 PoE, while lower-tier models rely on lower Class 2 PoE power budgets that cannot support multiple expansion modules and USB peripherals simultaneously.
6. Dual USB 2.0 peripheral ports (front-side low-power + rear high-power fast charging): The CP-8851-K9 also includes dual USB ports, while mid/lower-tier models carry only a single USB port or none at all.
7. 5-inch high-resolution color touchscreen WVGA LCD display: Identical high-resolution display specification to the CP-8845-K9 and CP-8851-K9 models, rendering full-color caller ID, real-time call timers, LDAP corporate directories, XML enterprise application dashboards, and customizable desktop wallpapers with multi-language global UI support including right-to-left Arabic/Hebrew rendering.

Unlike Cisco’s entry-level voice-only 8811-K9 and mid-tier voice-only 8841-K9 desk IP phones, the CP-8861-K9 is purpose-built for multinational executives, cross-region department directors, and high-volume global call center supervisors requiring maximum multi-line scalability via three Key Expansion Modules (KEMs), built-in Bluetooth wireless headset freedom, Cisco Intelligent Proximity mobile-desk call unification technology, and exclusive external auxiliary audio I/O support for large executive office conference audio setups, while retaining all core enterprise voice collaboration features of the broader 8800-series line. Compared to the CP-8851-K9 mid-tier executive voice model, the CP-8861-K9 delivers expanded three-KEM multi-line scalability and unique external auxiliary audio I/O conference audio hardware support for top-tier global executive and high-volume supervisor deployments, while sharing identical Bluetooth, PoE+, dual USB, color touch LCD and dual-protocol SCCP/SIP firmware flexibility.

Primary global deployment value proposition: Delivers flagship maximum three-KEM multi-line executive voice collaboration scalability for high-volume cross-border enterprise supervisors, exclusive external auxiliary audio I/O for large executive office conference audio deployments, built-in Bluetooth wireless headset support and Cisco Intelligent Proximity mobile-desk call integration technology, studio-class HD wideband voice audio clarity, dual USB peripheral port connectivity, and unrestricted worldwide non-regional firmware compatibility for cross-border multinational enterprise deployments, compatible with standardized IEEE 802.3af Class 4 PoE+ corporate LAN infrastructures across all international regions, centrally manageable via zero-touch TFTP auto-provisioning to minimize global enterprise IT operational overhead, engineered with industry-leading TLS/AES encrypted voice media security to fully protect confidential cross-border executive office voice conference conversations, and built with a streamlined ergonomic touchscreen design that balances premium flagship executive voice collaboration functionality, maximum multi-line KEM scalability, exclusive external conference audio hardware support, and mass global deployment cost efficiency for multinational enterprise management and high-volume cross-region supervisor office fleets.