Cisco CP-9951-CL-K9= IP phone / endpoint
Brand: Cisco | Category: Accessories & Components
SKU: CSC-CP-9951-CL-K9 | Part #: CP-9951-CL-K9= | MPN: CP-9951-CL-K9=
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About the Cisco CP-9951-CL-K9= IP phone / endpoint
As a critical communications endpoint in production environments, the Cisco CP-9951-CL-K9= requires fast replacement paths and reliable support—making inventory depth essential for IT procurement teams managing large-scale Unified Communications deployments.
The Cisco Unified IP Phone 9900 Series delivers enterprise-grade voice clarity and feature richness for demanding office environments. This charcoal-finished desktop phone combines a responsive 5-inch WVGA colour backlit LCD display (480 × 272 pixels) with dual signalling protocols—SIP and SCCP—to ensure broad platform compatibility. Audio quality spans multiple codecs including G.711a, G.711μ, G.722 wideband HD audio, G.729a, and iLBC, enabling crystal-clear conversations in any network configuration. The integrated dual-port Gigabit Ethernet switch simplifies network integration, while IEEE 802.3af Power over Ethernet eliminates the need for separate power infrastructure—though an optional external AC adapter is available if required. Five programmable line keys combined with dedicated feature buttons for Hold, Transfer, Conference, Redial, Messages, Settings, Applications, Headset, Mute, Speaker, and Volume control provide intuitive call handling. The phone supports Cisco Unified Communications Manager (UCM) and Webex Calling platforms, with LDAP and Cisco UCM directory integration for rapid contact lookup. Wired headsets, Bluetooth headsets, and full-duplex speakerphone modes adapt to any working style, while a single USB 2.0 port enables peripheral connectivity and device charging. Security is embedded throughout: 802.1X authentication, SRTP media encryption, and TLS signalling encryption protect sensitive communications. The adjustable footstand accommodates any desk layout; optional wall-mount kits (sold separately) enable flexible deployment options. Cisco XML Services framework support allows custom on-device applications, extending functionality beyond standard calling.
Key Specifications
- Manufacturer Part Number: CP-9951-CL-K9=
- Product Series: Cisco Unified IP Phone 9900 Series
- Display: 5-inch WVGA colour backlit LCD (480 × 272 pixels)
- Signalling Protocols: SIP, SCCP
- Supported Codecs: G.711a, G.711μ, G.722, G.729a, iLBC
- Ethernet Interface: Integrated dual-port Gigabit Ethernet switch (10/100/1000 Mbps)
- Power Input: IEEE 802.3af PoE or optional external AC adapter
- Security: 802.1X authentication, SRTP media encryption, TLS signalling encryption
Technical Specifications
| Brand | Cisco |
| Category | Accessories & Components |
| SKU | CSC-CP-9951-CL-K9 |
| Part Number | CP-9951-CL-K9= |
| Condition | New |
| Interface | 802.3af PoE |
| Manufacturer Part Number | CP-9951-CL-K9= |
| Product Series | Cisco Unified IP Phone 9900 Series |
| Colour | Charcoal |
| Display | 5-inch WVGA colour backlit LCD (480 × 272 pixels) |
| Signalling Protocols | SIP, SCCP |
| Supported Codecs | G.711a, G.711μ, G.722 (wideband HD audio), G.729a, iLBC |
| Ethernet Interface | Integrated dual-port Gigabit Ethernet switch (10/100/1000 Mbps) |
| Power Input | IEEE 802.3af Power over Ethernet (PoE) or optional external AC adapter |
| USB Port | 1 × USB 2.0 (peripheral and charging support) |
| Wireless | Bluetooth (headset profile support) |
| Programmable Line Keys | 5 |
| Fixed Feature Buttons | Dedicated buttons for Hold, Transfer, Conference, Redial, Messages, Settings, Applications, Headset, Mute, Speaker, Volume |
| Audio Modes | Handset, headset (wired and Bluetooth), full-duplex speakerphone |
| Call Platform Compatibility | Cisco Unified Communications Manager (UCM), Webex Calling |
| Application Support | Cisco XML Services framework for custom on-device applications |
| Directory Integration | LDAP corporate directory, Cisco UCM directory |
| Security | 802.1X authentication, SRTP media encryption, TLS signalling encryption |
| Mounting | Adjustable footstand; optional wall-mount kit (sold separately) |
| Form Factor | Desktop IP Phone |
Frequently Asked Questions about Cisco CP-9951-CL-K9= IP phone / endpoint
What does the Cisco CP-9951-CL-K9= IP phone / endpoint do?
The Cisco CP-9951-CL-K9= IP phone / endpoint is enterprise IT hardware deployed in production data centers, server rooms, and edge sites across the GCC and EMEA region.