CP-7811-K9-RF Cisco IP Phone 7811 supporting one line (available in charcoal only)

Hardware Features

Ergonomic Design: The Cisco IP Phone 7800 Series offers a familiar user experience with an intuitive interface, designed for ease of use in traditional telephony environments.

Display: The 7821, 7841, and 7861 models feature a white backlit 3.5″ grayscale display (396×162 pixels), while the 7811 has a non-backlit 3.28″ grayscale display (384×106 pixels). Displays support scrollable menus and XML-based applications.

Handset: The 7821, 7841, and 7861 include wideband-capable handsets via RJ-9 ports. The 7811 comes with a narrowband handset (upgradeable to wideband). All models are HAC-compliant and meet ADA standards, with optional inline amplifiers for additional loudness support.

Headset Support: RJ-9 analog headset ports with wideband audio are supported on the 7821, 7841, and 7861. Not available on the 7811.

Backlit Indicators: LED indicators are available for line, message waiting, and audio path keys (except headset on 7811).

Volume Control: Toggle switch adjusts volume for the handset, speaker, and ringer.

Speakerphone: Full-duplex speakerphone functionality with DTMF tone masking enhances security during calls.

Bezel Options: The 7821, 7841, and 7861 come with a default black bezel (user-replaceable). A silver bezel is available separately. The 7811 includes a fixed black bezel.

Foot Stand: The 7821, 7841, and 7861 support dual-angle positioning (30° and 45°). The 7811 supports a fixed 45° position. All are wall-mountable with an optional kit.

Electronic Hook Switch: Available on 7821, 7841, and 7861 for third-party headset integration via auxiliary port.

Keys: All models include line keys, soft keys, navigation/select keys, dedicated function keys (Hold, Transfer, Conference), and volume/speaker/mute controls. The headset key is not available on the 7811.

Ethernet Connectivity: Dual-port 10/100BASE-T Ethernet supported across all models. The 7841 supports 10/100/1000BASE-T with Cat5/5e/6 cabling.

Power Features

PoE Support: All models comply with IEEE 802.3af (Class 1) PoE, with a maximum power draw of 3.84W.

AC Power Option: Compatible with Cisco Power Cube 3 (CP-PWR-CUBE-3=) and Adapter 3 (CP-PWR-ADPT-3) for non-PoE deployments.

Power Injectors: The 7811, 7821, and 7861 support CP-PWR-INJ. The 7841 supports AIR-PWRINJ5=.

Call-Control Compatibility

Compatible with Cisco Unified Communications Manager (8.5.1+, 8.6.2, 9.1.2, 10.x+), Cisco Business Edition 6000, Cisco Hosted Collaboration Solution (HCS), and Cisco Unified SRST (8.x+).

Specifications

Protocols: SIP (Session Initiation Protocol)

Audio Codecs: G.711a/u, G.722 (wideband), G.729a, iLBC

Key Features: Supports a comprehensive set of call features including Call Forward, Conference, Voicemail, Hold/Resume, Call History, Directory, Busy Lamp Field (except 7811), Auto-answer, Whisper Coaching, and more. Certain features like Intercom and Join are not available on the 7811.

Language Support: Multilingual interface including Arabic, Chinese, English, French, German, Japanese, Russian, Spanish, Turkish, and many others (full list available).

Ringtones: User-adjustable ring tones per line appearance.

Directory Access: LDAP-based corporate directory integration with categorized message display and direct dial-back.

QoS Support: 802.1Q/p and Cisco Discovery Protocol (CDP) for VLAN tagging and prioritization.

Security: End-to-end encryption with SRTP and TLS (AES-128/256), secure boot, device/file/image authentication, 802.1X support, and encrypted configuration files.

Configuration: Static IP or DHCP client configuration options available.

Dimensions (IP Phone 7811): 207 x 195 x 33 mm (without foot stand)

Weight (IP Phone 7811): 806 g

Switch Ports (7811): Two 10/100 Ethernet RJ-45 ports for LAN and downstream device connection.

Material: ABS textured plastic casing

Power Requirements: 48 VDC via PoE or optional local power supply (CP-PWR-CUBE-3=)

Environmental: Operating temperature: 0–40°C; Storage temperature: -10–60°C; Humidity: 10–90% operating, 10–95% non-operating (non-condensing)

Compliance & Certifications

Regulatory: CE, UL 60950, CAN/CSA-C22.2, EN/IEC 60950, AS/NZS 60950, GB4943

EMC (Emissions): FCC Part 15 Class B, CISPR22 Class B, EN55022 Class B, ICES003, VCCI, EN61000-3-2/-3, KN22

EMC (Immunity): EN55024, CISPR24, EN60601-1-2, KN24

Telecom: FCC Part 68 HAC, CS-03-HAC, AS/ACIF S004/S040, NZ PTC 220, TIA 810/920, IEEE 802.3/802.3af/802.3at