Cisco CP-7861-K9 Full English Product Description

Listing Title

Cisco CP-7861-K9 Unified 16-Line IP Desk Phone (Dual CUCM SCCP / MPP 3PCC Open SIP Dual Firmware), 3.5-inch White-Backlit Monochrome 396×162 LCD Display, Dual 10/100BASE-TX Fast Ethernet Switched Ports with PC Pass-Through, IEEE 802.3af Class 1 PoE Powered, G.722 HD Wideband Full-Duplex Echo-Canceling Speakerphone, 16 Programmable Tricolor BLF Line Keys, Dedicated Hold / Transfer / Conference Fixed Hard Keys, RJ9 Analog Headset Port, HAC Hearing-Aid Compatible Handset, EnergyWise Eco Power-Saving Operation, Textured Charcoal Black ABS Chassis, Interchangeable Silver Decorative Bezel Optional Upgrade, Two-Position Adjustable Desktop Stand, Wall Mountable (Wall Kit Sold Separately), Ideal for Corporate Receptionists, Executive Assistants, Call Center Supervisors, Multi-Line Office Managers, Hotel Front Desk Attendants and High-Density 16-Line Heavy-Traffic Enterprise VoIP DeploymentsCisco

Full Commercial Overview

The Cisco CP-7861-K9 is the flagship high-density 16-line VoIP endpoint within the Cisco IP Phone 7800 Series, purpose-built for front desk receptionists, executive assistants and call center supervisors who require massive multi-line capacity, BLF presence monitoring for dozens of internal extensions, and enterprise-grade unified communications functionality. The phone supports dual native firmware modes: proprietary SCCP (Skinny Client Control Protocol) for on-prem Cisco Unified Communications Manager (CUCM)/CUCM Express, and Multiplatform (MPP) 3PCC open SIP firmware fully compatible with Webex Calling, BroadWorks, Zoom Phone and all third-party hosted SIP PBX/UCaaS platforms.

Core Differentiators vs Mid-Tier 7800 Series Models

1. 16 programmable tricolor BLF line keys(the largest line capacity in the 7800 series; CP-7841 only supports 4 lines, CP-7821 supports 2 lines, CP-7811 supports 1 line)Cisco.
2. Wider chassis footprint (207mm × 265mm vs 206mm width for 7821/7841) to accommodate the vertical bank of 16 BLF keys on the right side of the unitCisco.
3. Dual 10/100 Fast Ethernet ports (not Gigabit like CP-7841), optimized for standard office desktop PC daisy-chaining without high-bandwidth workstation requirements.
4. Retains all shared premium features of the 7821/7841: identical 3.5-inch high-resolution monochrome backlit LCD, G.722 HD wideband audio, full-duplex echo-canceling speakerphone, HAC handset, EnergyWise power-saving modes and interchangeable silver decorative front bezel as a cosmetic upgrade accessory.

The unit is constructed from durable, recyclable textured polycarbonate ABS plastic, with ultra-low Class 1 PoE power consumption (max typical power draw of only 3.84W) and configurable LCD backlight timeout / EnergyWise sleep modes to cut off-hours energy costs and meet corporate green IT sustainability standards. It ships with a two-angle adjustable foldable desktop foot stand for ergonomic screen viewing; vertical wall installation requires a separate optional wall-mount accessory kit, with pre-designed rear chassis cutouts for secure mounting.

Cisco announced End-of-Sale (EoS) for the entire 7800 Series on May 8, 2026, with the final hardware order cutoff set for October 28, 2026. Limited critical security and bug maintenance support will continue through the published hardware lifecycle timeline, with no new feature firmware development planned. All remote mass provisioning, unattended bulk firmware upgrades and centralized device monitoring are supported via TFTP/HTTP/HTTPS secure auto-provisioning servers and an embedded HTTPS web administration portal, fully integrated with CUCM and cloud third-party UCaaS voice platformsCisco.

Hardware & Physical Design Architecture

1. Ergonomic Wide Chassis & Mounting Options

• Form factor: Wide low-profile desktop body equipped with a two-position adjustable foldable foot stand delivering optimized LCD viewing angles for receptionist front-desk workspaces. The foot stand can be fully detached; wall mounting requires separate optional wall-mount kit with dedicated rear chassis mounting cutouts.
• Chassis material: Textured matte black recyclable polycarbonate ABS plastic; interchangeable silver decorative front bezel available as a separate cosmetic upgrade accessory for modern office aesthetic customizationCisco.
• Physical Dimensions (H × W × D, excluding foot stand and handset): 207mm × 265mm × 28mmCisco.
• Total Unit Weight (including standard coiled handset): 1053 grams.
• Operating Environment (Indoor Use Only): Operating Temperature: 0°C ~ +40°C (32°F ~ 104°F) Storage Temperature: -10°C ~ +60°C (14°F ~ 140°F) Operating Humidity: 10% – 90% non-condensing Storage Humidity: 10% – 95% non-condensing

2. Key Layout, LCD Display & Control Hardware

The CP-7861 features a large high-resolution backlit monochrome LCD paired with a vertical bank of 16 programmable BLF line keys on the right chassis edge, plus standard fixed-function hard keys optimized for high-density multi-line reception workflows:

1. Backlit monochrome LCD display: 3.5-inch diagonal screen, 396 × 162 pixel resolution, adjustable screen contrast and backlight brightness; supports multi-language and right-to-left on-screen text rendering for global enterprise deployments. The screen displays color-coded Caller ID name/number, real-time call timers, local call history logs, personal/corporate directory entries, system menu navigation, date/time clock, multi-line status indicators and voicemail MWI alerts.
2. Sixteen vertical tricolor LED illuminated programmable BLF line keys: The flagship defining feature of the CP-7861; each key supports independent directory number (DN) registration and visual real-time line state signaling (solid green = idle line; solid red = active/held call; flashing red = incoming ringing call). All 16 keys support BLF presence monitoring for shared extensions, colleague line status tracking, speed dial assignment and call park line mapping.
3. Three dedicated one-touch fixed function hard keys: Hold, Transfer, Conference for instant call control without multi-layer menu navigation.
4. Standard 12-key tactile backlit numeric dial pad (0–9, *, #) with high-contrast backlit keys for low-light reception area visibility.
5. Three context-sensitive softkeys positioned directly below the LCD screen, dynamically mapped to on-screen menu options.
6. Central five-way directional navigation rocker with integrated select button for scrolling contact directories, call logs and device configuration menus.
7. Auxiliary dedicated shortcut hard keys: Mute, Headset, Volume Up/Down rocker, Redial, End Call, Messages, Applications, Directory one-touch shortcut keys.
8. Vertical red Message Waiting Indicator (MWI) LED on the top chassis edge to notify users of unheard voicemail messages.

3. HD Wideband Audio Subsystem & Supported Codecs

• Ergonomic analog coiled handset with noise-isolating receiver, certified HAC (Hearing-Aid Compatible) to meet global accessibility standards for users wearing hearing assistive devices.
• Built-in full-duplex echo-canceling hands-free speakerphone optimized for G.722 HD wideband voice clarity, with automatic DTMF tone masking during speakerphone operation for call privacy in busy reception lobbies.
• Dedicated RJ9 modular analog headset port supporting all standard wired office headsets for long-duration private reception calls.
• Supported voice audio encode/decode codecs: G.722 HD wideband audio, G.711a / G.711u narrowband, G.729a, G.729ab, iLBC low-bitrate codec.
• Voice quality optimization features: Voice Activity Detection (VAD), Comfort Noise Generation (CNG) to eliminate artificial silent line background noise during idle call periods.

Network, Power & Hardware Interfaces

1. Dual 10/100BASE-TX Fast Ethernet Switched RJ45 Ports

Two auto-sensing Fast Ethernet ports with integrated mini internal network switch, enabling seamless daisy-chaining of standard desktop PCs without additional wall-mounted Fast Ethernet network jacks, reducing front-desk cabling infrastructure costs:

• Primary WAN Network Port: Connects the IP phone to corporate LAN switches, VoIP gateways or SIP PBX servers for SIP/SCCP call control signaling and RTP voice media data streams.
• Secondary PC Pass-Through Port: Provides direct Fast Ethernet wired network connectivity for attached laptops, desktop workstations or POS terminals routed through the phone’s integrated switch.

Supported networking standards: IPv4 addressing only (DHCP dynamic IP assignment or static manual IP configuration), Cisco Discovery Protocol (CDP), LLDP-MED device discovery, 802.1Q voice VLAN tagging, 802.1p Layer 2 QoS traffic prioritization, STUN NAT traversal for remote worker deployments, SNTP network time synchronization, IEEE 802.1X port-based network authentication for enterprise LAN security enforcement.

2. Dual Power Supply Options (Class 1 PoE Primary Power)

1. Native IEEE 802.3af Class 1 Power over Ethernet support (primary power source): Maximum typical power consumption: Only 3.84 watts for ultra-low idle energy draw, configurable screen backlight timeout and Cisco EnergyWise sleep mode to further reduce power usage during off-hours, weekends and non-business shiftsCisco. Input rating: 48V DC PoE power input from all compliant IEEE 802.3af PoE network switches.
2. Optional auxiliary external 48V DC universal AC-to-DC power cube (part number CP-PWR-CUBE-3=, sold separately) for non-PoE network environments lacking PoE-enabled switches.

3. Rear Panel Physical Interfaces

1. RJ9 modular handset jack for connecting the coiled handset cord
2. Dual RJ45 10/100 Fast Ethernet PoE switched ports (Network uplink + PC pass-through)
3. RJ9 analog headset audio jack
4. DC 48V auxiliary power input jack for optional external power adapter
5. Recessed pinhole password-protected factory reset button to restore all device firmware and configuration settings to factory default values

Core Telephony Feature Set

All calling and device configuration functions are provisioned via CUCM / third-party SIP PBX auto-provisioning templates; routine call operations are triggered via dedicated physical hard keys or LCD softkey menu navigation:

1. 16-Line Multi-Call Handling Supports sixteen independent directory number (DN) line registrations with multi-call-per-line appearance, allowing multiple concurrent active calls on each line plus native call waiting functionality. Dedicated Hold key for call park, dedicated Transfer and Conference hard keys for one-touch consultative transfer and three-way ad-hoc audio conference calls. Supports call swap between multiple active calls, automatic last-number redial via dedicated Redial key. All 16 vertical line keys support BLF presence monitoring for shared extensions or co-worker line status tracking, a critical feature for receptionists managing dozens of internal staff lines.
2. Caller ID & Personalization Features Visual Caller ID name and number display on the backlit LCD screen; adjustable ringtone volume and multiple selectable distinct ringtone tones, customizable unique ring alert patterns for incoming internal vs external calls. On-device local directory storage with search functionality, plus XML framework support for corporate LDAP enterprise directory lookup and XML hosted application rendering.
3. Utility Workplace Calling Functions One-touch redial, mute hard key for confidential private conversations, dedicated headset mode toggle, shared line appearance monitoring support for multi-user shared reception lines, call forward all/busy/no answer, call park and call pickup functionality, intercom auto-answer calling for internal facility staff communication, Extension Mobility (EM) and Cross Cluster Extension Mobility (EMCC) support for roaming receptionist user profiles across multi-branch enterprise campuses.
4. Local Call Log Storage Onboard persistent flash memory storage for dialed outgoing calls, received answered calls and missed incoming calls, complete with timestamp, call duration and full Caller ID details; all logs fully viewable directly on the phone’s LCD screen or embedded web management portal. The device stores up to 24 entries each for dialed, received and missed call records.
5. Voicemail MWI Integration Native Message Waiting Indicator (MWI) notification delivered via SIP/SCCP SUBSCRIBE/NOTIFY messaging; steady red chassis MWI LED illumination plus on-screen LCD pop-up visual alerts to notify users of unheard voicemail messages, with dedicated Messages shortcut key for one-touch voicemail retrieval.
6. Supported Security Call Features Anonymous incoming call rejection, outbound caller ID blocking configurable via PBX/server-side settings, end-to-end encrypted SIP/SCCP call control signaling (TLS 1.2) and encrypted voice media streams (SRTP AES 128/256 encryption) for secure communications on shared corporate LAN networks.

Security & Remote Device Management Capabilities

1. End-to-End Encrypted Voice & Signaling Communications TLS transport layer encryption for all SCCP/SIP call setup and control signaling; SRTP AES encrypted RTP voice media data streams to prevent unauthorized wireless or wired call audio interception on shared office network infrastructures. The platform supports AES-128 and AES-256 encryption algorithms for both signaling and media traffic.
2. Multi-Tier Access Permission Controls Separate administrator and end-user access privilege levels protected by unique alphanumeric authentication passwords; password-locked factory reset function to block unauthorized wiping of device line registrations, directory contacts and critical reception BLF key configuration data.
3. Centralized Auto-Provisioning & Unattended Firmware Upgrades Fully unattended remote bulk firmware upgrades pushed via TFTP/HTTP/HTTPS secure auto-provisioning servers, fully compatible with CUCM, CUCM Express and third-party SIP/UCaaS platforms including Webex Calling, BroadWorks and Zoom Phone. Embedded HTTPS web-based local administration portal for on-site device configuration and real-time status monitoring of all 16 line registrations.
4. System Monitoring & Built-In Network Diagnostics Real-time device status tracking available via CUCM / third-party SIP PBX management consoles, including online/offline LAN connectivity status, all 16 SIP/SCCP line registration states, active call session auditing and centralized syslog event logging for complete network telephony audit trails; integrated built-in ping and traceroute diagnostic tools for front-desk network connectivity troubleshooting.

Environmental & Regulatory Compliance Certifications

• Regulatory EMI/EMC: FCC Part 15 Class B electromagnetic interference compliance, CE marking for European Union market compliance, AS/NZS CISPR22 Class B certification.
• Safety certifications: UL / C-UL 60950 Second Edition electrical safety certification, EN 60950 Second Edition (including A11 and A12), IEC 60950 Second Edition (including A11 and A12), AS/NZS 60950, GB4943 China national safety standard.
• Telecom regulatory approvals: FCC Part 68 telecom terminal device certification, TIA 810A HAC hearing aid compatibility standard.
• Memory architecture: 8MB flash memory for persistent firmware, directory and configuration storage; 32MB SDRAM runtime memory for SCCP/SIP call processing, LCD screen rendering and network stack operation.
• Lifecycle Status: Announced End-of-Sale (EoS) May 8, 2026, final hardware order deadline October 28, 2026; limited critical security/bug maintenance support only, no new feature firmware development.
• Warranty: Standard one-year limited Cisco hardware warranty for commercial business end-user deployments.

Key Specification Bullet Points

• Model Number: Cisco CP-7861-K9 (Charcoal Black 16-Line Unified IP Phone; Silver decorative bezel sold separately as upgrade accessory)
• Device Type: Flagship High-Density 16-Line Unified IP VoIP Desk Phone (Dual Native CUCM SCCP / MPP 3PCC Open SIP Dual Firmware), Backlit Monochrome LCD Display, Dual Switched Fast Ethernet Ports with PC Pass-Through
• Supported Telephony Protocols: SCCP (Skinny Client Control Protocol) for Cisco CUCM / UCME; MPP Multiplatform 3PCC SIP v2 open standard for third-party SIP PBX / Webex Calling / Zoom Phone / BroadWorks UCaaS platforms
• Supported Voice Audio Codecs: G.722 HD Wideband Audio, G.711a / G.711u, G.729a, G.729ab, iLBC Low Bitrate Codec
• Display: Backlit Monochrome LCD Screen, 3.5-inch diagonal, 396 × 162 Pixel Resolution, Adjustable Contrast & Backlight Brightness, Multi-Language & Right-to-Left Text Support
• Fixed Hardware Function Keys: 16 Vertical Programmable Tricolor BLF Line Keys, Dedicated Hold, Redial, Transfer, Conference, Mute, Headset Hard Keys; Three Dynamic LCD Softkeys, Five-Way Navigation Rocker, One-Touch Shortcut Keys for Messages, Applications, Directory
• Audio Features: HAC Hearing-Aid Compatible Handset Receiver, Full-Duplex Echo-Canceling HD Wideband Hands-Free Speakerphone, VAD Voice Activity Detection, CNG Comfort Noise Generation, RJ9 Analog Headset Port
• Physical Interfaces: 1 x RJ9 Handset Port, Dual 10/100BASE-TX RJ45 Fast Ethernet Switched PoE Ports (Network Uplink + PC Pass-Through), RJ9 Headset Jack, 48V DC Aux Power Input Jack, Password-Protected Factory Reset Pinhole
• Power Specifications: IEEE 802.3af Class 1 PoE Primary Power, Max Typical Power Consumption 3.84W, Configurable Backlight Timeout + Cisco EnergyWise Energy-Saving Mode; Optional Separate 48V DC Universal AC Power Cube (CP-PWR-CUBE-3=, Sold Separately)
• Mounting Method: Adjustable two-position foldable desktop foot stand as standard; Wall mountable via separate optional wall-mount accessory kit
• Supported QoS & Networking Features: IPv4 DHCP/Static IP Assignment, CDP/LLDP-MED Device Discovery, 802.1Q Voice VLAN Tagging, 802.1p Layer 2 QoS Prioritization, STUN NAT Traversal, SNTP Network Time Synchronization, IEEE 802.1X Port-Based Network Authentication
• Security Features: TLS 1.2 Encrypted SCCP/SIP Call Signaling, SRTP AES 128/256 Encrypted Voice Media Streams, Dual-Level Admin/User Password Access Control, Password-Locked Factory Reset, Embedded HTTPS Web Administration Interface
• Core Telephony Call Features: 16 Independent SIP/SCCP Line Registrations with BLF Presence Monitoring, Multi-Call-Per-Line Appearance, Supports Multiple Concurrent Calls + Call Waiting, Dedicated Hold / Redial / Transfer / Conference Hard Keys, Full-Duplex HD Wideband Speakerphone, Visual LCD Caller ID Display, MWI Voicemail Message Waiting LED Alert, Anonymous Call Rejection, Outbound Caller ID Blocking, Shared Line Appearance Support, Call Forward, Call Park & Call Pickup, Extension Mobility (EM) / EMCC Cross Cluster Mobility, Local Stored Call Logs (24 entries each for dialed/received/missed), XML LDAP Corporate Directory Lookup, XML Hosted Application Rendering, Intercom Auto-Answer Calling
• Management Tools: TFTP/HTTP/HTTPS Secure Remote Auto-Provisioning, Unattended Bulk Remote Firmware Upgrades, Embedded Web-Based Local Admin Portal, CUCM / Third-Party SIP PBX Centralized Device Monitoring, Syslog Event Logging, Built-In Ping/Traceroute Network Diagnostic Tools
• Target Deployment Scenarios: Corporate front desk receptionist workstations, executive assistant multi-line desks, call center supervisory stations, hotel and resort front desk attendant telephony, multi-branch enterprise campus high-density multi-line voice deployments, medical clinic multi-line reception counters, all heavy-traffic enterprise VoIP environments requiring up to 16 independent multi-call lines, visual LCD call management and dedicated physical transfer/conference hard keys for high-volume reception workflows
• Lifecycle Status: Announced End-of-Sale (EoS) May 8, 2026, final hardware order deadline October 28, 2026
• Warranty: One-year limited Cisco hardware warranty

Model Quick Reference

• CP-7861-K9 is the flagship high-density 16-line IP phone of the Cisco IP Phone 7800 Series, supporting dual CUCM SCCP/SIP and open MPP 3PCC third-party SIP firmware, purpose-built for corporate receptionists, executive assistants and call center supervisors managing up to 16 independent multi-call lines with BLF extension presence monitoring.
• Core positioning: High-capacity reception-focused business VoIP endpoint with large high-resolution backlit monochrome graphical LCD display, differentiated from all lower-tier 7800 series models by its exclusive 16 vertical programmable BLF line keys (the maximum line capacity of the entire 7800 portfolio), wider chassis footprint to accommodate the dense vertical key bank, dual Fast Ethernet PC passthrough switch (non-Gigabit), while retaining all premium HD wideband audio, enterprise telephony and energy-saving features shared across the 7821/7841 platforms.
• Key internal series differentiation vs other 7800 series models:
  1. CP-7811-K9: Single independent line only, no BLF line key bank, smaller low-resolution LCD screen, basic shortcut key layout, dual Fast Ethernet ports only
  2. CP-7821-K9: Dual independent multi-call lines with BLF presence monitoring, large high-res 396×162 LCD screen, expanded dedicated shortcut keys for directory, messages and applications, dual Fast Ethernet ports only
  3. CP-7841-K9: Four independent multi-call lines with BLF presence monitoring, identical large high-res LCD screen specification as 7821, upgraded dual Gigabit Ethernet ports for high-bandwidth PC passthrough, expanded dedicated shortcut keys for directory, messages and applications
  4. CP-7861-K9: Sixteen independent multi-call lines with vertical bank of 16 BLF presence monitoring keys (flagship unique feature), identical large high-res LCD screen, dual Fast Ethernet ports (no Gigabit), full suite of enterprise reception-focused telephony features including Extension Mobility and bulk BLF extension mapping
• Primary deployment advantage: Industry-leading 16-line multi-call capacity and dense vertical BLF presence monitoring key bank optimized exclusively for high-volume front-desk receptionist workflows, combining massive multi-line management capability, sharp high-resolution LCD visual Caller ID and directory management, dual Fast Ethernet switch eliminating extra wall jacks for attached office PCs, dedicated physical Transfer/Conference hard keys to simplify daily multi-call reception workflows, ultra-low Class 1 PoE power consumption with configurable backlight EnergyWise sleep mode, flexible desktop or optional wall mounting, and dual firmware compatibility supporting both on-prem CUCM and cloud third-party UCaaS voice platforms for multi-branch enterprise reception deployments.

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