CP-8811-K9 – Five-Line IP Phone – Gigabit Ethernet – Enhanced UCL

4.86 reviews6 Questions
List Price: $553.00 65% OFF
$192.85
Price Alert
In StockShips in as little as 1 business day Brand New
Related models
Cisco SN CheckSN verification before shipment.Verify authenticity3-Year WarrantyExtended, enterprise-gradeWarranty terms14-Day ReturnsStraightforward RMA processReturn policyExpress Shipping2-6 Business Daysvia UPS, FedEx, DHL and more
Trusted & Secure Payments

Why Layer23-Switch

Stocked, Shipped and Supported by One Team

Founded
Customers
Units shipped
Countries

Inventory You Can See

Cisco stock on hand
Models ready to ship
Warehouse space

Ships in 1 Business Day

In-stock orders leave our Hong Kong or U.S. warehouse within 1 business day after payment, with tracking by email.

DHL FedEx UPS Duties included: US · CA · UK

LSCare Warranty

3years on enterprise equipment

  • Advance replacement for in-stock models
  • New unit for dead-on-arrival
  • 14-day returns on sealed items

Free CCIE Support

Certified engineers help before and after you buy. Reply within 1 business day by email or live chat.

Part number check Configuration Troubleshooting

Verify Before You Pay

100%factory-sealed

Get label and serial photos before shipment, and check every serial number with Cisco.

CP-8811-K9 Description

The CP-8811-K9 is a Cisco IP Phone 8811 desk phone for Cisco Unified Communications Manager environments that need a voice-only endpoint with five line keys. The phone has a 5-inch 800 x 480 grayscale display, five programmable line and feature keys, a two-port 10/100/1000 switch for a co-located PC and IEEE PoE Class 2 power. The phone does not support key expansion modules and registers to Cisco Unified Communications Manager 12.5 and later with an Enhanced User Connect License.

Quick Specs

Parameter

Specification

Product ID

CP-8811-K9

Product type

Cisco IP Phone 8811 desk phone

Programmable line and feature keys

5

Display

5 in. 800 x 480 grayscale widescreen display

Integrated switch

10/100/1000BASE-T with LAN and co-located PC connectivity

Headset ports

RJ-9 analog headset port and auxiliary EHS port

PoE class

IEEE Power over Ethernet Class 2

Power input rating

0.917A, 48V DC

CUCM license

Enhanced User Connect License

CUCM support

Cisco Unified Communications Manager 12.5 and later

Dimensions and weight

9.02 x 10.13 x 1.57 in., 2.58 lb with handset

Application Scenarios

Knowledge Worker Desk

An office worker on Cisco Unified Communications Manager gets five programmable line and feature keys on the desk, enough for a primary line plus a few shared or speed-dial keys.

Desk With A Co-Located PC

Where one cable run serves the desk, the phone’s two-port 10/100/1000 switch passes the connection through to the user’s PC, so the phone and the PC share a single LAN drop.

Class 2 PoE Wiring Closet

In a wiring closet whose switch ports supply IEEE 802.3af or 802.3at power, the phone runs from PoE Class 2, and Cisco Power Cube 4 covers desks with no PoE at all.

Product Comparison

Parameter

CP-8811-K9

CP-8841-K9

CP-8851-K9

Display

5 in. 800 x 480 grayscale

5 in. 800 x 480 color

5 in. 800 x 480 color

Programmable line and feature keys

5

5

5

Bluetooth

Not published

Not published

Bluetooth 3.0 EDR Class 1, up to 20 m

USB

Not published

Not published

Side USB port, 500 mA

Key expansion module support

Not supported

Not supported

Up to 2 Cisco IP Phone 8800 Key Expansion Modules

Power over Ethernet

IEEE 802.3af/at Class 2

IEEE 802.3af/at Class 2

Class 3 before hardware V08; Class 4 for V08 and later

CUCM license

Enhanced User Connect License

Enhanced User Connect License

Enhanced User Connect License

CP-8811-K9 is the grayscale 5-inch model of the 8800 desk phones, while CP-8841-K9 keeps the same five line keys and Class 2 PoE but has a color display at the same 800 x 480 resolution. Desks that need USB, Bluetooth or a key expansion module move to CP-8851-K9: Cisco’s administration guide lists CP-8811-K9 as a phone without KEM support, and CP-8851-K9 takes up to two modules. CP-8851-K9 also raises the PoE requirement to Class 3 before hardware version V08 and Class 4 from V08, against Class 2 for CP-8811-K9, so the switch budget must be rechecked when moving up. All three connect to Cisco Unified Communications Manager with the Enhanced User Connect License.

Ordering Checklist

  • Color variant: Order CP-8811-K9= for Charcoal or CP-8811-W-K9= for White. The color is set by the PID, and the wrong one cannot be changed after delivery.
  • Call-control license: Add an Enhanced User Connect License for each phone registered to Cisco Unified Communications Manager. The phone hardware does not carry the calling entitlement.
  • Power: Provide IEEE class 2 PoE from the switch, or add CP-PWR-CUBE-4= (CP-PWR-CUBE-4-S= with switch) plus a country power cord. Without PoE the phone has no power, and the cube ships without a cord.
  • Expansion module: Leave CP-8800-A-KEM= off the order, since the administration guide lists the 8811 as unsupported. A module added to this phone cannot be attached.

Product Front

The following table describes the Cisco IP Phone 8800 Series Buttons.

The Cisco IP Phone 8800 Series has two distinct hardware types:

  • Cisco IP Phones 8811, 8841, 8851, 8851NR, and 8861—do not have a camera.
  • Cisco IP Phones 8845, 8865, and 8865NR—have a built-in camera.

1

Incoming call or voicemail indicator

2

Camera (Cisco IP Phone 8845 and 8865)

3

Feature and session buttons

4

Softkeys

5

Back, Navigation cluster, and Release

6

Hold, Transfer, and Conference

7

Headset, Speakerphone, and Mute

8

Voicemail, Applications, and Directory

9

Volume

Specifications

Parameter Specification Parameter Specification
Product ID CP-8811-K9 Cisco ordering ID CP-8811-K9=
Product type Cisco IP Phone 8811 desk phone Color Charcoal
Programmable keys 5 Display 5 in. 800 x 480 grayscale widescreen display
Ethernet switch 10/100/1000BASE-T with two-port Cisco Ethernet switch PC connectivity Single LAN connection for phone and co-located PC
PoE class IEEE Power over Ethernet Class 2 PoE standards Compatible with IEEE 802.3af and 802.3at switch blades
Power input rating 0.917A, 48V DC Local power option Cisco IP Phone Power Cube 4 for non-PoE deployments
CUCM support Cisco Unified Communications Manager 12.5 and later Unified CME support 10.0 and later through fast track
BE 6000 support 8.6.2, 9.1.2, 10.5.2, 11.0 and later HCS support 8.6.2 and later using supported UCM versions
CUCM license Enhanced User Connect License Signaling protocol Session Initiation Protocol
Codec support G.711, G.722, G.722.2, G.729ab, iLBC, iSAC, OPUS QoS 802.1Q/p
Discovery protocols Cisco Discovery Protocol, LLDP-MED Handset Wideband-capable RJ-9 handset
Analog headset Wideband-capable RJ-9 audio port AUX port Electronic hookswitch control with a third-party headset
Speakerphone Full-duplex speakerphone Foot-stand positions 35 degrees and 50 degrees
Wall mounting Optional wall-mount kit available separately Dimensions 9.02 x 10.13 x 1.57 in. excluding foot stand
Weight 2.58 lb with handset Operating temperature 0°C to 40°C (32°F to 104°F)
Operating humidity 10% to 90%, noncondensing Phone casing composition Polycarbonate ABS textured plastic
Security slot Kensington Security Slot compatible

Quality Certifications

Customer Reviews

Write A Review
4.8
(6 reviews)
5 Stars
5
4 Stars
1
3 Stars
0
2 Stars
0
1 Stars
0
    Sandra Collins
    Posted on 31/01/2026
    Verified Buyer
    5.0

    Returned for our second order within weeks. No regrets.

    Danny Clark
    Posted on 28/01/2026
    Verified Buyer
    5.0

    They didn’t just take my order — they made sure I was ordering the right thing.

    Douglas Smith
    Posted on 28/12/2025
    Verified Buyer
    4.0

    Our operations manager asked to formalize Layer23 as a preferred supplier. Done.

    Father Gabriel
    Posted on 18/08/2024
    Verified Buyer
    5.0

    Blessed with a clear connection. Delivery was miraculous… or just efficient.

    VoIP Tech
    Posted on 05/04/2024
    Verified Buyer
    5.0

    Basic gigabit phone. Greyscale screen is fine for general staff. Reliability is key.

Questions & Answers

  • Which call platforms does CP-8811-K9 register to?

    CP-8811-K9 registers to Cisco Unified Communications Manager 12.5 and later, and each phone needs an Enhanced User Connect License. Signaling uses Session Initiation Protocol, and Cisco Hosted Collaboration Solution 8.6.2 and later is also listed.
  • What PoE class does CP-8811-K9 need, and what powers it without PoE?

    CP-8811-K9 uses IEEE Power over Ethernet Class 2 and is compatible with IEEE 802.3af and 802.3at switch blades. A desk without PoE uses Cisco IP Phone Power Cube 4, CP-PWR-CUBE-4= (CP-PWR-CUBE-4-S= with switch), plus a country power cord, because the cube ships without one.
  • Which Cisco IOS releases support CP-8811-K9 on Unified CME and SRST?

    CP-8811-K9 registers to Unified CME 10.0, which needs IOS load 15.3(3)M, and to SRST 8.0 and above, which needs IOS load 15.1(1)T, per the Cisco IP Phone 8800 firmware 14.3 and 14.4 release notes.
  • Which firmware file installs release 14.4(1)SR1 on CP-8811-K9?

    CP-8811-K9 takes 14.4(1)SR1 from the COP file cmterm-88xx-sip.14-4-1-0101-153.k4.cop.sha512, or from cmterm-88xx.14-4-1-0101-153.zip by manual TFTP copy. Unified CM must run the latest device package first, or the firmware may not work correctly.
  • Which audio codecs does CP-8811-K9 support?

    CP-8811-K9 supports G.711, G.722, G.722.2, G.729ab, iLBC, iSAC and OPUS, and it signals with Session Initiation Protocol. Quality of service uses 802.1Q/p, and the phone discovers its VLAN through Cisco Discovery Protocol or LLDP-MED.
  • What temperature and humidity range does CP-8811-K9 operate in?

    CP-8811-K9 operates at 0°C to 40°C (32°F to 104°F) and 10% to 90% noncondensing humidity. Place it in a conditioned office area; a warehouse or unheated closet outside that range is outside the rated limits.

Warranty

Visit How to Pay page for more information

FREE NETWORK TOOLS

Verify, plan, and comparewith confidence

Use practical tools to check device details, review lifecyclemilestones, and compare hardware before you buy.

DataSheet Downloads

  • CP-8811-K9 Datasheet