CP-8811-K9 - Cisco IP Phone 8811

Cisco CP-8811-K9 — Cisco 8811 IP Phone

What it is

CP-8811-K9 is a Cisco 8811 Series enterprise IP desk phone designed for business voice communications.
It’s a solid, feature-rich VoIP phone with a high-resolution grayscale display, programmable line/feature buttons, and integrated speakerphone — ideal for everyday office calling in Cisco Unified Communications environments.

Why buyers pick CP-8811-K9 (plain English)

Professional voice quality
Wideband audio and a full-duplex speakerphone deliver clear, natural conversation for business use.

Easy-to-read display
High-resolution grayscale screen shows caller info, directories, and feature menus without clutter.

Multiple line support
Programmable buttons let you manage several extensions, speed dials, or shared lines.

Headset and power options
Supports wired headsets (RJ-9), PoE to reduce cable clutter, and optional power adapter for flexible installs.

Cisco-qualified hardware
Built and validated for use with Cisco Unified Communications Manager (CUCM) and compatible Cisco VoIP platforms.

60-second spec box (CP-8811-K9)

Phone type
IP desk phone (VoIP)

Display
High-resolution grayscale

Audio
Wideband audio, full-duplex speakerphone

Lines / extensions
Multiple programmable line/feature buttons

Network
10/100/1000 Ethernet with integrated switch port

Power
PoE (802.3af) or optional power adapter

Headset support
RJ-9 wired headsets

Use case
Office voice, general IP telephony, shared workstations.

Where it fits (and when to choose something else)

Perfect for:

• Office workers and general business users

• Cisco UC environments (CUCM deployments)

• Environments needing multiple lines without complexity

• Shared desks and everyday voice calling

Choose something else if:

• You want a color display or touchscreen → Cisco 8841/8851

• You need video calling → Cisco video phones

• You’re using a third-party SIP platform → 3PCC-capable models

TL;DR

CP-8811-K9 is Cisco’s 8811 IP phone:
a reliable, business-ready desk phone with multiple line support and quality audio for general enterprise voice use.