Cisco 8841 IP Phone CP-8841-K9 delivers professional-grade voice communication technology designed for modern business environments. This enterprise-class IP phone combines advanced audio capabilities with intuitive user interface design, making it an essential tool for organizations seeking reliable telecommunication infrastructure.

Technical Specifications and Display Technology

The CP-8841-K9 features a prominent 5-inch high-resolution WVGA color display with 800×480 pixel resolution, providing crystal-clear visual information for call management and directory navigation. The backlit screen ensures optimal visibility across various lighting conditions, supporting productivity throughout the workday.

Core Technical Features:

• High-resolution 5-inch WVGA color display (800×480 pixels)
• 10/100/1000 Ethernet switch with PoE Class 2 power requirements
• Full-duplex speakerphone with wideband audio support
• Five programmable line keys with four configurable options
• Wall-mountable design with replaceable bezel options (black and silver)

Advanced Communication Capabilities

This professional IP phone supports extensive call management features that enhance workplace communication efficiency. The Cisco IP Phone 8841 integrates seamlessly with corporate telephony networks, providing users with comprehensive calling functionality.

Communication Features:

• Multiple codec support including G.711a-law, G.722, G.729a, iLBC, and iSAC
• Conference calling with traditional join capabilities
• Call transfer, hold, park, and pickup functions
• Busy Lamp Field (BLF) with speed dial integration
• Extension mobility and cross-cluster support
• Visual voicemail and message waiting indicators

Physical Design and Connectivity

The phone measures 9.02 × 10.13 × 1.57 inches (229.1 × 257.34 × 40 mm) excluding the foot stand, with a total weight of 2.58 pounds (1.17 kg) including the handset. The CP-8841-K9 incorporates durable polycarbonate ABS textured plastic construction, ensuring longevity in demanding office environments.

Connectivity Options:

• Network port (10/100 SW) with IEEE 802.3af power capability
• PC access port (10/100 PC) connection
• Handset and analog headset connections
• Optional auxiliary port for third-party accessories
• Electronic hookswitch control for compatible headsets

Security and Network Protocol Support

Enterprise security remains paramount in the Cisco IP Phone 8841 design. The device incorporates multiple security layers including secure boot processes, encrypted credential storage, and comprehensive authentication protocols.

Security Implementation:

• Device and configuration file authentication with encryption
• Image authentication and secure credential storage
• Certificate Authority Proxy Function (CAPF) support
• Manufacturer-Installed Certificates (MIC) and Locally Significant Certificates (LSC)
• 802.1x supplicant with EAP-FAST and EAP-TLS support
• TLS signaling encryption and SRTP media encryption

Global Language and Environmental Compatibility

The phone supports over 35 international languages, including Arabic, Chinese (multiple variants), European languages, Japanese, Korean, and Thai. This extensive language support makes the CP-8841-K9 suitable for multinational organizations and diverse workplace environments.

Operating Specifications:

• Operational temperature range: 32°F to 104°F (0°C to 40°C)
• Humidity tolerance: 10-90% operating, 10-95% non-operating (noncondensing)
• Temperature shock resistance: 14°F to 140°F (-10°C to 60°C)

Network Protocol Integration

The device supports comprehensive network protocols including Session Initiation Protocol (SIP) for signaling, IPv4 and IPv6 compatibility, Dynamic Host Configuration Protocol (DHCP) client functionality, and Real-Time Transport Protocol (RTP) for media streaming. Additionally, it incorporates Cisco Discovery Protocol and LLDP support for enhanced network integration capabilities.