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Cisco CP-6921-C-K9=

Cisco IP Phone 6900 Series - UC Phone 6921, Charcoal STANDARD HANDSET
Pixel-based graphical, monochrome anti-glare displays

The Cisco IP Phone 6900 Series is a new and innovative portfolio of endpoints that deliver affordable, business-grade, voice communication services to customers worldwide. Six models are available: the Cisco Unified IP Phone 6901 (trimline), Cisco Unified IP Phone 6911 (one -line), Cisco Unified IP Phone 6921 (two-line), Cisco Unified IP Phone 6941 (four-line) Cisco Unified IP Phone 6945 (four -line), and Cisco Unified IP Phone 6961 (twelve-line). Most of the models support full-duplex speakerphones for a more productive, more flexible, and easier-to-use endpoint experience. Some models introduce support for single-call per-line appearance, offering a traditional telephony-like interaction for customers who seek this type of call experience for their users. Fixed keys for hold, transfer, and conference, tri-color LED line and feature keys also make the phone simpler and easier to use.

Technical Information

  • Total Number of Phone Lines: 2
  • IP Phone Technology: VoIP
  • Voice Codec:
    • G.711
    • G.711a
    • G.729a
    • G.729b
    • G.729ab

General Information

  • Product Type: IP Phone
  • Product Series: 6900
  • Brand Name: Cisco
  • Manufacturer: Cisco Systems, Inc
  • Product Model: 6921
  • Product Name: 6921 Unified IP Phone
  • Product Line: Unified

Physical Characteristics

  • Color: Charcoal
  • Form Factor:
    • Desktop
    • Wall Mountable
  • Weight (Approximate): 2.71 lb


  • PoE (RJ-45) Port: Yes
  • Headset Port: Yes


  • Package Contents:
    • 6921 Unified IP Phone
    • Foot stand
    • Standard Handset
    • 6921 Unified IP Phone
    • Foot stand
    • Standard Handset


  • Buttons & Keys Type:
    • Hold Button
    • Call Transfer


  • Limited Warranty: 1 Year

Management & Protocols

  • Communication Protocols: SCCP

Display & Graphics

  • Display Color: Monochrome

Full specifications (PDF)


The Cisco CP-6921-C-K9= is also known as CSC-CP6921CK9= or CP6921CK9= .