Cisco IP Phone 8841 CP-8841-K9 - 5-Line Gigabit PoE VoIP Desk Phone, 5-in. 800x480 Color Display, Wideband Audio, Charcoal - New

The Cisco IP Phone 8841 (CP-8841-K9) is an enterprise VoIP desk phone for small to large business deployments running Cisco Unified Communications Manager (UCM). It offers a 5-inch widescreen VGA backlit color display (800 x 480, 24-bit), five programmable line keys with multicall-per-line, wideband audio and a full-duplex speakerphone, plus a built-in 2-port Gigabit Ethernet switch (10/100/1000BASE-T) that lets the phone share a single LAN drop with a co-located PC. Power is supplied by IEEE 802.3af or 802.3at Power over Ethernet (Class 2) through a PoE-capable network switch or PoE injector; an optional Cisco Power Cube 4 (CP-PWR-CUBE-4) with regional cord supports non-PoE installs (sold separately). This SKU ships with Enterprise firmware preloaded for Cisco UCM, Unified CME, Business Edition 6000, or HCS — for Webex Calling, BroadWorks, Asterisk, FreePBX, or other third-party SIP platforms, the Multiplatform (3PCC) variant (CP-8841-3PCC-K9) ships with the appropriate firmware out of the box.

Cisco IP Phone 8841 CP-8841-K9 - Key Features & Benefits

• 5-Inch Widescreen VGA Color Display: 5-in. 800 x 480 widescreen VGA backlit color display with 24-bit color depth for scrollable access to calling features, corporate directory, call history, and text-based XML applications. Localized language support includes right-to-left on-screen text for global users.
• Five Programmable Line Keys with Multicall-per-Line: Each of the five line keys can be assigned to a directory number, speed dial, busy lamp field (BLF), call park, intercom, or shared line. Multicall-per-line lets one line appearance handle multiple concurrent calls — actual concurrent call capacity depends on UCM configuration, not just the number of physical keys.
• Wideband Audio + Full-Duplex Speakerphone: Wideband-capable RJ-9 handset, full-duplex speakerphone, and wideband-capable RJ-9 analog headset jack deliver clear voice. The AUX port supports electronic hookswitch (EHS) with compatible third-party headsets. Hearing Aid-Compatible (HAC) handset with ADA-compliant dial pad.
• 2-Port Gigabit Ethernet Switch + 802.3af/at PoE: Built-in 10/100/1000BASE-T switch (IEEE 802.3i/802.3u/802.3ab) with RJ-45 interface shares a single LAN drop with a co-located PC, with separate 802.1Q VLANs for voice and data. Powered by IEEE 802.3af or 802.3at PoE (Class 2) via a PoE-capable switch or PoE injector; optional Cisco Power Cube 4 (CP-PWR-CUBE-4) supports non-PoE installs (sold separately).
• Enterprise Security Support: Supports secure boot, device authentication, Manufacturer-Installed Certificates (MIC) and Locally Significant Certificates (LSC), EAP-FAST and EAP-TLS 802.1X supplicants, TLS-encrypted signaling, SRTP media encryption, HTTPS for client and server, and an SSL-based VPN client. Feature availability and behavior depend on UCM configuration and current phone firmware.
• Wide Codec & Protocol Support: Native audio codec support includes G.711 (A-law/µ-law), G.722, G.729ab, and iLBC, with additional codecs (G.722.2, iSAC, and OPUS) listed for the model on current firmware. Network protocols: SIP, SDP, IPv4 and IPv6, DHCP, TFTP, HTTPS, LLDP-MED, Cisco Discovery Protocol, and 802.1Q VLAN tagging.
• Flexible Mounting + EnergyWise: Dual-position foot stand with 35° and 50° viewing angles; wall-mountable using the optional CP-8800-WMK wall-mount kit (sold separately). Kensington Security Slot (K-Slot) antitheft compatibility. Supports Cisco EnergyWise technology and is Energy Star qualified.

Cisco IP Phone 8841 CP-8841-K9 - Technical Specifications

• Part Number: CP-8841-K9 • Color: Charcoal
• Lines: 5 programmable line keys with multicall-per-line
• Display: 5-in. widescreen VGA backlit color • 800 × 480 • 24-bit
• Audio Codecs: G.711 (A-law/µ-law), G.722, G.729ab, iLBC; additional codecs (G.722.2, iSAC, OPUS) per current firmware
• Audio: Wideband • Full-duplex speakerphone • HAC handset • ADA-compliant dial pad
• Headset Ports: RJ-9 wideband analog • AUX port for electronic hookswitch (EHS)
• Ethernet: 2× 10/100/1000BASE-T (RJ-45), IEEE 802.3i/802.3u/802.3ab
• Power: IEEE 802.3af / 802.3at PoE Class 2 • Optional Cisco Power Cube 4 (CP-PWR-CUBE-4) for non-PoE
• Network Protocols: SIP, SDP, IPv4/IPv6, DHCP, TFTP, HTTPS, LLDP-MED, 802.1Q VLAN
• Security: TLS, SRTP, EAP-FAST/EAP-TLS, secure boot, MIC/LSC certs, SSL VPN client (depends on UCM/firmware)
• Call Control Compatibility: Cisco UCM 12.5+, Unified CME 10.0+, Business Edition 6000, HCS
• Licensing: Cisco UCM license entitlement required (Enhanced UCL per current Cisco licensing)
• Mounting: Dual-position foot stand (35°/50°) • Wall-mount kit sold separately • Kensington Security Slot
• Dimensions (H × W × D): 9.02 × 10.13 × 1.57 in. (229.1 × 257.34 × 40 mm), excluding foot stand
• Weight: 2.58 lb (1.17 kg) with handset
• Operating Temperature: 32 to 104°F (0 to 40°C)
• Condition: New

Cisco IP Phone 8841 CP-8841-K9 - Frequently Asked Questions (FAQ)

• Will this phone work with my non-Cisco phone system or third-party SIP service?
  The CP-8841-K9 ships with Enterprise firmware preloaded for Cisco UCM, Unified CME, Business Edition 6000, or HCS — this is the standard SKU for Cisco-managed deployments. For Webex Calling, BroadWorks, Asterisk, FreePBX, 3CX, or RingCentral, the Multiplatform (3PCC) variant CP-8841-3PCC-K9 is preloaded with the appropriate firmware out of the box. Firmware migration between Enterprise and MPP is possible via Cisco's licensing/migration tool, but factory firmware determines out-of-box behavior — choose the variant that matches your platform.
• How is the phone powered? Is a power adapter included?
  The phone is powered by IEEE 802.3af or 802.3at Power over Ethernet (Class 2) through a PoE-capable network switch or PoE injector — no separate adapter is needed when PoE is available on the network. For non-PoE installations, the optional Cisco Power Cube 4 (CP-PWR-CUBE-4) with a regional power cord (e.g., CP-PWR-CORD-NA) is sold separately.
• Does "5 line keys" mean five simultaneous calls?
  Not directly. The phone has five physical programmable line keys, each of which can be assigned to a directory number, speed dial, BLF, or other feature. Multicall-per-line lets a single line appearance handle multiple active calls — the actual number of concurrent calls depends on UCM configuration, line key assignment, and per-line call limits, not the count of physical keys alone.
• Does it support a co-located PC, or do I need a separate network drop?
  The CP-8841-K9 includes a built-in 2-port Gigabit Ethernet switch (10/100/1000BASE-T) — connect the uplink (network) port to your switch and the PC port to your computer to share a single LAN drop. Separate 802.1Q VLANs for voice and data are supported.

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