CP-6921-C-K9 Cisco Telephony Equipment
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CP-6921-C-K9 Cisco 2 Lines Charcoal IP Phone SCCP and SIP New

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Part Number#: CP-6921-C-K9
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Short Description:
CP-6921-C-K9 Unified 6900 Series 2 Lines Power over Ethernet (PoE) RJ-45 Port Headset Monochrome Display Charcoal IP Phone | Made by Cisco | New Factory Sealed
Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days
Product Details for the Cisco CP-6921-C-K9 2 Lines Charcoal IP Phone

The Cisco Unified 6921 IP Phone CP-6921-C-K9 is a high-performance, full-featured IP phone designed for small to medium-sized businesses and branch offices. It is part of the Cisco Unified Communications System, which provides a complete and integrated solution for voice, video, data, and mobile communications. It includes a high-resolution color display, which provides easy navigation and access to call functions, as well as a built-in speakerphone and headset port for hands-free communication. Additionally, it includes a wide range of features such as voicemail, call hold, call transfer, and call forwarding, which allow users to easily manage and control their calls. The phone also includes an integrated Cisco Unified Communications Manager Express, which provides call routing and call handling capabilities. It also has power over Ethernet (PoE) capabilities, which allows for easy installation and eliminates the need for an external power supply.

Design and Build

The Cisco CP-6921-C-K9 IP Phone is characterized by a sleek and ergonomic design, ensuring both style and functionality. The device features a Charcoal-colored finish, adding a touch of sophistication to any workspace. Its compact and sturdy build makes it suitable for various environments, from office desks to conference rooms.

Display and User Interface

Equipped with a clear and easy-to-read display, the Cisco CP-6921-C-K9 IP Phone provides users with a seamless navigation experience. The intuitive user interface is designed to minimize the learning curve, allowing users to quickly access and utilize the phone's features. The 2-line display ensures that essential information is easily accessible, enhancing overall user efficiency.


The Cisco CP-6921-C-K9 IP Phone supports Power over Ethernet (PoE), eliminating the need for a separate power source. This feature simplifies installation and reduces cable clutter, making it an ideal choice for businesses aiming for a clean and organized workspace. The RJ-45 port ensures a reliable network connection, further enhancing the phone's performance.

Power over Ethernet (PoE)

One of the notable features of the CP-6921-C-K9 is Power over Ethernet (PoE) support. PoE allows the phone to receive power and data over a single Ethernet cable, simplifying installation and reducing the clutter of additional power cords. This not only streamlines the setup process but also contributes to a cleaner and more organized workspace.

SCCP and SIP Protocols

The CP-6921-C-K9 supports both SCCP (Skinny Call Control Protocol) and SIP (Session Initiation Protocol) protocols. This dual-protocol compatibility provides flexibility for users and IT administrators, allowing them to choose the protocol that best aligns with their communication infrastructure. SCCP is widely used in Cisco environments, while SIP is a more universal protocol, enabling interoperability with a variety of communication systems.

  • Enhanced Productivity: With its 2 lines capability, users can efficiently manage multiple calls without the need for additional devices. This enhances productivity by reducing the time spent toggling between calls and streamlining communication processes.
  • Cost-Efficient Power Solution: The PoE capability of the Cisco CP-6921-C-K9 not only simplifies installation but also presents a cost-effective power solution. By eliminating the need for separate power cables, businesses can reduce infrastructure costs and achieve a more economical telephony setup.
  • Reliable Network Connectivity: The presence of an RJ-45 port ensures a reliable and stable network connection. This is crucial for maintaining clear voice quality and minimizing the risk of dropped calls or communication disruptions. The RJ-45 port contributes to the overall reliability of the IP phone in diverse networking environments.
  • Flexible Deployment Options: Supporting both SCCP and SIP protocols, the Cisco CP-6921-C-K9 offers businesses flexibility in choosing the communication protocol that best suits their infrastructure. This adaptability makes the IP phone a versatile choice for various deployment scenarios, catering to the unique needs of different organizations.
  • Hands-Free Convenience: Headset compatibility adds a layer of convenience for users who prefer hands-free communication. Whether engaging in long conference calls or multitasking at the desk, the ability to use a headset enhances comfort and flexibility, contributing to an improved overall user experience.
Lines and ProtocolsLines

The CP-6921-C-K9 IP Phone supports 2 lines, providing flexibility for users who need to manage multiple calls simultaneously. This feature is particularly beneficial in a business setting where multitasking is common. Whether handling customer inquiries or participating in conference calls, the phone's dual-line support ensures efficient communication.

Supported Protocols

The Cisco CP-6921-C-K9 IP Phone is compatible with both SCCP (Skinny Client Control Protocol) and SIP (Session Initiation Protocol) protocols. This dual-protocol support enhances interoperability, allowing the phone to seamlessly integrate with various communication systems. Businesses with diverse communication infrastructures can benefit from the flexibility offered by these protocols.

Headset Compatibility

The inclusion of headset support in the Cisco CP-6921-C-K9 IP Phone adds another layer of convenience for users. Whether for hands-free communication or to reduce background noise in a busy office environment, connecting a headset to the phone is a straightforward process. This feature is particularly valuable for individuals who spend extended periods on calls or participate in virtual meetings.

Unified Communication

The Cisco CP-6921-C-K9 IP Phone is part of the Unified Communications (UC) ecosystem, aligning with Cisco's commitment to providing integrated communication solutions. This integration allows users to leverage a unified platform for voice, video, messaging, and collaboration. The phone's compatibility with Cisco's UC solutions enhances communication efficiency and fosters seamless collaboration among team members.

High Performance

The Cisco Unified 6921 IP Phone (CP-6921-C-K9) is a high-performance device that is designed to provide advanced communication capabilities for small to medium-sized businesses. The phone is built with high-quality components and is backed by Cisco's reputation for producing dependable telecommunication equipment.

The product IP phone offers a wide range of features and capabilities that make it an ideal choice for businesses that require a high level of communication and connectivity. It includes advanced call handling features, such as call hold, call transfer, and call forward, which allow users to easily manage their calls. Additionally, the phone is equipped with a large backlit display and a color-coded LED status indicator, which provide easy-to-read call information and status.

The phone also features a user-friendly interface that allows users to easily navigate through the phone's features and functions. The phone also includes a full-duplex speakerphone and headset support, which allows for hands-free communication. Additionally, it has an intuitive and easy-to-use graphical user interface (GUI) that allows for simple and easy setup and management.

Main Information about this Cisco CP-6921-C-K9 IP Phone
  • Manufacturer: Cisco
  • Part Number or SKU# CP-6921-C-K9
  • Product Line: Unified
  • Product Series: 6900
  • Product Type: IP Phone
Technical Information for Unified IP Phone
  • IP Phone Technology: VoIP
  • Total Number of Phone Lines: 2
  • G.711: Standard voice codec.
  • G.711a: A variant of G.711 with some specific features.
  • G.729a: Another codec option for voice compression.
  • G.729b: Similar to G.729a but with some differences.
  • G.729ab: Combines features of both G.729a and G.729b.
Interfaces/Ports of Cisco IP Phone
  • Headset Port: Yes
  • PoE (RJ-45) Port: Yes

Management and Protocols of Charcoal Standard Handset

  • Communication Protocols: SCCP

Display & Graphics

  • Display Color: Monochrome

Finally, the Cisco CP-6921-C-K9 IP Phone stands out as a reliable and feature-rich communication solution for businesses of all sizes. From its sleek design to the support for Power over Ethernet, dual protocols, and headset compatibility, the phone is designed to enhance user experience and streamline communication processes. As part of Cisco's Unified Communications ecosystem, it not only meets current communication needs but also positions businesses for future advancements in the world of unified communication and collaboration. With its security features, ease of installation, and compatibility with diverse industries, the Cisco CP-6921-C-K9 IP Phone is a valuable asset for organizations seeking a robust and efficient

Product Condition:
New Retail Factory Sealed
Warranty provided by ALLHDD.COM:
90 Days

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30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

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