Cisco CP-6911-K9 Full English Product Description

Listing Title

Cisco CP-6911-K9 Unified Single-Line IP Desk Phone (Dual SCCP/SIP Protocol), No LCD Display, Dual 10/100 Fast Ethernet Switched Ports with PC Pass-Through, IEEE 802.3af Class 2 PoE Powered, Full-Duplex Echo-Canceling Speakerphone, Dedicated Transfer, Conference, Hold, Redial & Call Waiting Hard Keys, Paper Speed Dial Label Strip, Desktop Two-Position Adjustable Stand or Wall Mountable, Eco-Friendly Recyclable Chassis, Charcoal Black Standard Handset Variant, Ideal for Small Office Staff, Retail Back Offices, Clinic Reception Desks, General Light-to-Medium Volume Single-Line Business VoIP Deployments

Full Commercial Overview

The Cisco CP-6911-K9 belongs to the Cisco Unified IP Phone 6900 Series, an entry-level cost-effective single-line VoIP endpoint built for routine business voice usage. It supports dual native telephony protocols: proprietary SCCP (Skinny Client Control Protocol) for Cisco Unified Communications Manager (CUCM)/UCME, and open SIP v2 for interoperability with third-party SIP PBX and UCaaS platformsCisco.

As the upgraded counterpart to the simpler CP-6901 model, the CP-6911 delivers key functional improvements: dual Fast Ethernet ports with built-in switch for PC daisy-chaining, dedicated physical Transfer and Conference keys (the 6901 relies on handset hookswitch for these functions), full-duplex speakerphone, and enhanced call handling capacity while retaining the cost-saving no-LCD compact trimline chassis design.

Multiple variant SKUs are available for flexible deployment:

1. CP-6911-K9: Base charcoal black chassis with standard curved handset
2. CP-6911-W-K9: Arctic white chassis variant
3. CP-6911-CL-K9: Charcoal black chassis with slimline lightweight handsetCisco

The phone features energy-efficient low-power operation, recyclable ABS plastic construction, and multi-language localised voice prompts for global enterprise deployments. All configuration, mass provisioning and unattended firmware upgrades are managed via TFTP/HTTP/HTTPS auto-provisioning servers and embedded HTTPS web administration portalCisco.

Hardware & Physical Design Architecture

1. Compact Trimline Chassis & Mounting Flexibility

• Form factor: Low-profile flat desktop body equipped with a two-position adjustable foldable foot stand for ergonomic desk placement. The stand can be fully detached to enable direct wall mounting without extra wall-mount accessory kits, with pre-drilled standardized mounting holes on the rear panel.
• Chassis material: Reground recyclable ABS plastic; base CP-6911-K9 ships in matte charcoal black finish.
• Handset options: Standard ergonomic coiled handset included as default; slimline lightweight handset available via separate SKU CP-6911-CL-K9.
• Physical Dimensions (H × W × D, excluding handset): 205mm × 188mm × 38.2mm
• Unit Weight (charcoal standard handset version): 917gCisco
• Operating Environment (Indoor Only): Operating Temperature: 0°C ~ +40°C (32°F ~ 104°F) Storage Temperature: -10°C ~ +60°C (14°F ~ 140°F) Operating Humidity: 10% – 95% non-condensing

2. Key Layout & Control Hardware (No LCD Screen)

The CP-6911 omits an LCD graphical display to reduce cost and simplify maintenance; all call status is indicated via tricolor LED line indicators and dedicated fixed function hard keys:

1. Single tricolor illuminated line key: Visual state signalling (solid green = idle line; solid red = active/held call; flashing red = incoming ringing call)
2. Six dedicated one-touch fixed function hard keys: Hold, Redial, Call Waiting, Transfer, Conference, Mute
3. Standard 12-key tactile numeric dial pad (0–9, *, #)
4. Large blank paper label strip above the dial pad for manually writing speed dial names and numbers
5. Handset cradle integrated hookswitch sensor for auxiliary call control operations
6. Vertical red Message Waiting Indicator (MWI) LED on the top edge of the chassis to alert users of unheard voicemail messages

3. Premium HD Audio Subsystem & Supported Codecs

• Ergonomic analog handset with noise isolation receiver, HAC (Hearing-Aid Compatible) certified for compliance with accessibility standards for users with hearing assistive devices
• Built-in full-duplex echo-canceling speakerphone (major upgrade over CP-6901 which only supports ringtone speaker) for hands-free conference calls
• Supported voice audio encode/decode codecs: G.711a / G.711u, G.729a, G.729ab, iLBC low-bitrate codec
• Voice quality optimisation features: Voice Activity Detection (VAD), Comfort Noise Generation (CNG) to eliminate silent line background noise during idle calls

Network, Power & Hardware Interfaces

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

Two auto-sensing Fast Ethernet ports with integrated mini network switch, a core deployment advantage for workstations with attached PCs:

• Primary WAN Network Port: Connects the IP phone to corporate LAN switches, VoIP gateways or SIP PBX appliances for SIP/SCCP control signaling and RTP voice media traffic
• Secondary PC Pass-Through Port: Enables direct connection of desktop PCs, laptops or POS terminals to the corporate network through the phone, eliminating the requirement for extra wall-mounted network jacks

Supported networking standards: IPv4 only addressing (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, SNTP network time synchronization.

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

1. Native IEEE 802.3af Class 2 Power over Ethernet support (primary power source): Maximum typical power consumption: Only 3.29 watts, ultra-low energy efficient operation Input rating: 48V DC PoE input from compliant PoE network switches
2. Optional external 48V DC universal AC-to-DC power cube (sold separately, part number CP-PWR-CUBE-3=) for non-PoE network environmentsCisco

3. Rear Panel Physical Interfaces

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

Core Telephony Feature Set

All calling and configuration functions are provisioned via CUCM / third-party SIP PBX auto-provisioning templates; routine operations are triggered via dedicated physical hard keys:

1. Single-Line Multi-Call Handling Supports up to two concurrent active calls with native call waiting service; dedicated Hold key for call park, dedicated Transfer and Conference hard keys for one-touch consultation transfer and three-way ad-hoc audio conference calls (no reliance on handset hookswitch unlike CP-6901). Supports call swap between multiple active calls, automatic last-number redial via dedicated Redial key.
2. Caller ID & Personalization Features Incoming Caller ID name/number delivered via distinct ringtone cadence and MWI LED alert (no screen visual text display); adjustable ringtone volume and multiple selectable ringtone tones; customizable unique ring alert patterns per line. Blank paper label strip for manual speed dial recording.
3. Utility Workplace Calling Functions One-touch redial, call waiting toggle, mute for confidential conversations, shared line appearance monitoring support for multi-user shared reception lines, call forward, call park and call pickup functionality.
4. Voicemail MWI Integration Native Message Waiting Indicator (MWI) notification via SIP/SCCP SUBSCRIBE/NOTIFY messaging; steady red chassis LED illumination to notify users of unheard voicemail messages.
5. Supported Security Call Features Anonymous incoming call rejection, outbound caller ID blocking via server-side configuration, encrypted SIP/SCCP call control signaling (TLS) and encrypted voice media streams (SRTP) for enterprise secure communications deployments.

Security & Remote Device Management Capabilities

1. End-to-End Encrypted Communications TLS transport layer encryption for SCCP/SIP call control signaling; SRTP AES encrypted RTP voice media streams to prevent call audio interception on shared office LAN networks.
2. Multi-Tier Access Permission Controls Separate administrator and end-user access privilege levels protected by unique authentication passwords; password-locked factory reset function to block unauthorized wiping of device configuration and line registration data.
3. Centralized Auto-Provisioning & Firmware Upgrades Unattended remote bulk firmware upgrades via TFTP/HTTP/HTTPS secure auto-provisioning servers, fully compatible with CUCM and third-party SIP PBX platforms. Embedded HTTPS web-based administration interface for local device configuration and real-time status monitoring.
4. System Monitoring & Diagnostics Real-time device status tracking via CUCM / SIP PBX management consoles, including online/offline connectivity status, line registration state, active call session auditing and centralized syslog event logging for network telephony audit trails.

Environmental & Regulatory Compliance Certifications

• Regulatory EMI/EMC: FCC Part 15 Class B electromagnetic interference compliance, CE marking for European Union markets, ICES-003 Class B certification
• Safety certifications: UL / C-UL 60950 electrical safety certification, EN 60950 IEC global electrical 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 and configuration storage; 32MB SDRAM runtime memory for SCCP/SIP call processing and network stack operation
• Lifecycle Status: Discontinued End-of-Sale legacy Cisco Unified IP Phone 6900 Series hardware, limited critical security bug maintenance support only with 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-6911-K9 (Charcoal Black Standard Handset); CP-6911-W-K9 (White Chassis); CP-6911-CL-K9 (Slimline Lightweight Handset Variant)
• Device Type: Entry-Level Single-Line Unified IP VoIP Desk Phone (Dual Native SCCP / SIP Dual Protocol), No LCD Display, Dual Switched Fast Ethernet Ports with PC Pass-Through
• Supported Telephony Protocols: SCCP (Skinny Client Control Protocol) for Cisco CUCM / UCME; SIP v2 open standard for third-party SIP PBX / UCaaS platforms
• Supported Voice Audio Codecs: G.711a / G.711u, G.729a, G.729ab, iLBC Low Bitrate Codec
• Display: No LCD graphical screen; Status indication via tricolor line LED and red MWI voicemail LED
• Fixed Hardware Function Keys: Dedicated Hold, Redial, Call Waiting, Transfer, Conference, Mute one-touch hard keys
• Audio Features: HAC Hearing-Aid Compatible Handset Receiver, Full-Duplex Echo-Canceling Hands-Free Speakerphone, VAD Voice Activity Detection, CNG Comfort Noise Generation
• Physical Interfaces: 1 x RJ9 Handset Port, Dual 10/100BASE-TX RJ45 Fast Ethernet Switched PoE Ports (Network + PC Pass-Through), 48V DC Aux Power Input Jack, Password-Protected Factory Reset Pinhole
• Power Specifications: IEEE 802.3af Class 2 PoE Primary Power, Max Typical Power Consumption 3.29W; Optional Separate 48V DC Universal AC Power Cube (Sold Separately)
• Mounting Method: Two-position adjustable removable foldable desktop foot stand as standard; Wall mountable without additional wall mount kit via rear pre-drilled holes
• 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
• Security Features: TLS Encrypted SCCP/SIP Call Signaling, SRTP AES Encrypted Voice Media Streams, Dual-Level Admin/User Password Access Control, Password-Locked Factory Reset, Embedded HTTPS Web Administration Interface
• Core Telephony Call Features: Single SIP/SCCP Line Registration, Supports Up To Two Concurrent Calls + Call Waiting, Dedicated Hold / Redial / Transfer / Conference Hard Keys, Full-Duplex Hands-Free Speakerphone, MWI Voicemail Message Waiting LED Alert, Anonymous Call Rejection, Outbound Caller ID Blocking, Shared Line Appearance Support, Call Forward, Call Park & Call Pickup
• 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 Network Diagnostics
• Target Deployment Scenarios: Small and medium business administrative staff desks, retail back-office workstations, clinic and dental practice reception counters, light-to-medium single-line office voice deployments, hotel auxiliary staff phones, lobby service phones, all routine business VoIP environments requiring cost-effective single-line endpoints with dedicated transfer/conference keys and PC daisy-chaining capability
• Lifecycle Status: Discontinued End-of-Sale legacy Cisco Unified IP Phone 6900 Series hardware
• Warranty: One-year limited Cisco hardware warranty

Model Quick Reference

• CP-6911-K9 is the base charcoal black single-line entry-level IP phone of Cisco Unified IP Phone 6900 Series, supporting dual SCCP/CUCM and open SIP third-party PBX protocols, designed for routine daily office voice usage.
• Core positioning: Cost-optimized single-line business VoIP endpoint without LCD display, differentiated from the simpler CP-6901 model by dual Fast Ethernet PC pass-through switch, dedicated physical Transfer/Conference hard keys and full-duplex hands-free speakerphone.
• Key internal series differentiation vs CP-6901:
  1. CP-6901: Single Fast Ethernet port (no PC pass-through), no dedicated Transfer/Conference keys (operated via handset hookswitch), ringtone-only speaker (no full-duplex speakerphone)
  2. CP-6911: Dual switched Fast Ethernet ports with PC daisy-chaining, dedicated physical Transfer and Conference hard keys, built-in full-duplex echo-canceling hands-free speakerphone
• Primary deployment advantage: Low total cost of ownership, dual-protocol compatibility for both Cisco CUCM and third-party SIP PBX platforms, dual Fast Ethernet switch eliminating extra wall jacks for office PCs, dedicated call control hard keys simplifying routine transfer/conference workflows, energy-efficient low-power PoE operation and flexible desktop/wall mounting for widespread small-business deployments.