Cisco IP Phone 8851 (CP-8851-K9) – 5″ Color Display, 5-Line SIP VoIP Phone with Bluetooth

SKU: CP-8851-K9

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Key Value Highlights

5-inch color WVGA (800×480) display – Clear view of calls, contacts and features.
5 programmable line keys – Manage several calls or lines from one desk phone.
2-port Gigabit Ethernet switch, PoE Class 3 – One network drop connects both the phone and a PC.
Wideband audio and full-duplex speakerphone – Natural, clear voice for calls and hands-free conversations.
Bluetooth and USB – Pair headsets and mobile phones for flexible calling.

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Description

Clear, reliable Cisco voice calling for busy professionals and team leads.

The Cisco IP Phone 8851 (CP-8851-K9) is a desk phone with a 5-inch color WVGA (800×480) display, 5 programmable line keys and a 2-port Gigabit Ethernet switch with PoE Class 3. It runs Cisco Enterprise firmware and suits busy professionals and team leads.

Why Businesses Replace Analog and Softphone-Only Setups with Cisco IP Phones

Analog phones need separate cabling and lack modern features, while softphones depend on headset quality and computer performance. Teams that take many calls need a dedicated device that is always ready and sounds clear.

The 8851 connects over the same Ethernet network as your computers and can be powered by PoE, so one cable carries voice, data and power. Its built-in switch lets a PC connect through the phone, saving switch ports and cabling.

It runs Cisco Enterprise firmware for Cisco call control such as Cisco Unified Communications Manager (CUCM), with consistent features across the Cisco phone portfolio.

Display and Line Management

The 5-inch color WVGA (800×480) display shows caller details, call status and menus, and 5 programmable line keys give quick access to lines, shared lines and speed dials. Up to two key expansion modules can be added.

Network and Power Efficiency

2-port Gigabit Ethernet switch, PoE Class 3 keeps desk cabling simple. PoE support means the phone can be powered by a PoE switch, so no separate power adapter is needed at the desk.

How to Set Up the Cisco IP Phone 8851

Connect the phone’s network port to a PoE switch port (or use the optional power supply), and connect your PC to the phone’s PC port.
Attach the handset and stand, then wait for the phone to start and obtain an IP address.
Register the phone with your call control system (for example CUCM) using its MAC address.
Test inbound and outbound calls, set the ring tone and volume, and update firmware from the call control platform.

Overview

Model Number	CP-8851-K9
Firmware	Cisco Enterprise (CUCM)
Display	5″ color WVGA, 800×480
Line Keys	5 programmable
Ethernet	2 x 10/100/1000 (integrated switch)
PoE	Class 3
Bluetooth Details	Yes
USB	1 port
Key Expansion Modules	Up to 2
Audio	Wideband, full-duplex speakerphone
Headset	RJ-9, Bluetooth, USB
Protocol	SIP

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Cisco IP Phone 8851 (CP-8851-K9) – 5″ Color Display, 5-Line SIP VoIP Phone with Bluetooth