CP-8851-K9 Cisco Unified 8851 5 Lines Standard IP Phone New

The Cisco CP-8851-K9 Unified 8851 IP Phone is a feature-rich and technologically advanced Voice over Internet Protocol (VoIP) device designed to meet the communication needs of modern businesses. This comprehensive overview will delve into the key features and functionalities of this IP phone, breaking down its specifications in simple language. With its 2 ports, support for 5 lines, and adherence to standard IP protocols, the Unified 8851 stands out as a reliable solution for organizations looking to enhance their communication infrastructure.

The Cisco Unified 8851 embraces Voice over Internet Protocol (VoIP) technology, which enables voice communication over the Internet rather than traditional telephone lines. This technology leverages the power of the internet to transmit voice data efficiently, providing businesses with cost-effective and versatile communication solutions.

The IP phone comes equipped with 2 ports, facilitating connectivity and flexibility in the deployment of network devices. These ports allow for daisy-chaining, where the phone can be connected to both a network switch and another network device, streamlining cabling and enhancing the overall efficiency of the network infrastructure.

The Unified 8851 supports up to 5 lines, providing users with the ability to handle multiple calls simultaneously. This is particularly beneficial for busy professionals who need to manage various calls, such as incoming calls, outbound calls, and conference calls, without the need for additional devices.

As a standard IP phone, the CP-8851-K9 follows established Internet Protocol (IP) standards for communication. This ensures compatibility with a wide range of VoIP systems and infrastructure. The use of standard protocols also facilitates seamless integration into existing IP-based networks, making it a versatile choice for businesses with diverse communication needs.

SIP (Session Initiation Protocol) Support

The Unified 8851 supports the Session Initiation Protocol (SIP), a standard protocol used for initiating, maintaining, modifying, and terminating real-time sessions that involve video, voice, messaging, and other communications applications and services. SIP compatibility enhances interoperability with various VoIP systems and platforms.

Wideband Audio

The VoIP technology in the CP-8851-K9 includes support for wideband audio, delivering high-quality and clear voice communication. Wideband audio, also known as HD voice, provides a more natural and immersive communication experience by extending the frequency range of traditional telephone audio.

Ethernet Ports

The IP phone features 2 Ethernet ports, allowing for versatile connectivity options. One port can be used to connect the phone to the network switch, while the other port can be utilized for connecting an additional network device, such as a computer. This daisy-chaining capability simplifies cabling and reduces the need for additional network infrastructure.

Power over Ethernet (PoE) Support

With Power over Ethernet (PoE) support, the CP-8851-K9 can receive power over the Ethernet cable, eliminating the need for a separate power source. This is especially convenient in environments where power outlets may be limited or where a clean and organized setup is desired.

The Unified 8851 is equipped with programmable line keys that allow users to handle multiple lines efficiently. These keys can be configured to represent different lines, extensions, or features, enabling users to quickly switch between calls and manage their communication tasks with ease.

The CP-8851-K9 may support Busy Lamp Field (BLF) functionality, allowing users to monitor the status of lines or extensions. BLF indicators provide visual cues about the availability or status of a line, helping users determine if a colleague is on a call, available, or away.

Being a standard IP phone, the Unified 8851 adheres to standard IP protocols for communication. This includes protocols such as TCP/IP (Transmission Control Protocol/Internet Protocol), UDP (User Datagram Protocol), and RTP (Real-time Transport Protocol), ensuring compatibility with a wide range of VoIP platforms and systems.

The use of standard IP protocols enhances the compatibility of the CP-8851-K9 with various VoIP systems and services. Businesses can seamlessly integrate this IP phone into their existing VoIP infrastructure, leveraging its advanced features without the need for complex configurations.

The Cisco Unified IP Phone 8851 is designed to deliver high-quality voice communication and a range of features to help improve productivity. Some of the key performance features of the 8851 include:

• HD audio: The phone supports wideband audio, which means it can transmit and receive calls in high definition. This results in more natural-sounding conversations and improved call clarity.
• Wideband codec support: The phone supports a range of codecs, including G.722 and G.729a, which are optimized for wideband audio. This allows it to transmit and receive calls with minimal audio degradation.
• Multiple call handling: The 8851 can support up to two calls at once, allowing you to hold or transfer calls as needed.
• Call history and redial: The phone stores a record of your recent calls, allowing you to easily redial numbers or return missed calls.

• Manufacturer: Cisco
• Model Number or SKU# CP-8851-K9
• Product Series: 8800
• Product Type: Technology VoIP

• IP Phone Unified 8851 Standard IP Phone
• Connectivity Technology Cable
• Caller ID: Yes
• Speakerphone: Yes
• Voice Codec-
• G.711a
• G.711u
• G.722
• G.729a
• iLBC
• iSAC
• Dialer Type Keypad

• Network (RJ-45): Yes
• Number of Network (RJ-45) Ports: 2
• USB: Yes
• Headset Port: Yes
• PoE (RJ-45) Port: Yes

• Screen Type LCD
• Backlight Yes
• Screen Size 5 Inch
• Screen Resolution 800 x 480

• Buttons & Keys Type-
• Programmable
• Directory
• Message
• Line Select
• Navigation
• Hold Button
• Call Transfer
• Conference
• Volume Control
• Speaker
• Headset
• Mute

• Cisco Unified Communications Manager - 8.5.1, 8.6.2, 9.1.2, and 10.0 and later; requires an Enhanced User Connect License (UCL) in order to connect to Cisco Unified Communications Manager
• Cisco Unified Communications Manager Express (Unified CME) - 10.0 and later through fast track
• Cisco Business Edition 6000 (BE 6000) - 8.6.2, 9.1.2, 10.0 and later
• Cisco Hosted Collaboration Solution (HCS) - 8.6.2 and later (using supported UCM versions and above)

In Summary, the Cisco CP-8851-K9 Unified 8851 IP Phone is a versatile and powerful communication device tailored to the needs of modern businesses. With its adoption of VoIP technology, 2 ports, support for 5 lines, and adherence to standard IP protocols, this IP phone offers a comprehensive solution for organizations seeking efficient and feature-rich communication tools. Whether used in offices, conference rooms, or other professional settings, the Unified 8851 delivers reliable and high-quality voice communication, contributing to streamlined business operations and enhanced collaboration.