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Cisco Desk Phone 9841 4-Line IP Phone 3.5-inch Greyscale Display Gigabit Switch PoE Class 2 USB-A TPM 2.0 Carbon Black

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Cisco Desk Phone 9841 4-Line Gigabit PoE Carbon Black
Cisco Desk Phone 9841 4-Line IP Phone 3.5-inch Greyscale Display Gigabit Switch PoE Class 2 USB-A TPM 2.0 Carbon Black
€255.27 inc. VAT
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DP-9841-K9=
€214.51
€255.27 inc. VAT
Ships from EU stock: 27 item(s)
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Product Code
CK50370
EAN Code
0889728594950
Manufacturer
Trust

Quick Specs

Lines
4 line keys
Platforms
Webex Calling, CUCM, SIP
Network
Gigabit switch, PoE Class 2
Security
TPM 2.0, AI noise removal
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Cisco Desk Phone 9841 — one phone for cloud or on-premises calling

4 linesGigabitPoE Class 2TPM 2.0

The Cisco Desk Phone 9841 is a four-line desk phone from Cisco’s 9800 Series that runs one firmware across Cisco Unified Communications Manager, Webex Calling, BroadWorks and other third-party cloud calling platforms. It has a 3.5-inch backlit greyscale display, an internal Gigabit switch, PoE Class 2, a USB-A port for headsets or a key expansion module, and a TPM 2.0 chip for hardware-based security. This code is the Carbon Black version.

Compatibility — check before buying:
The 9841 has no Bluetooth and no Wi-Fi — wireless headsets must use a USB-A dongle or the RJ-9 headset port. Cisco lists the power supply as a separate accessory: use a PoE switch or order the Cisco Power Adapter 3 for your region. The First Light (light) colour is a different code, DP-9841-L-K9=. Tell us the phone system or provider you use and we check compatibility before you buy.

Best For

✓ Webex Calling and CUCM sites
✓ Businesses moving from on-premises to cloud
✓ Gigabit office networks
✓ Users with USB headsets
✓ Security-conscious organisations
✓ Standard knowledge-worker desks

Key Features

 
One phone, many platforms
The same device and firmware work on CUCM, Webex Calling, BroadWorks or third-party cloud calling.
 
Gigabit switch
Internal 2-port 10/100/1000 switch so the PC shares the phone’s network cable at full speed.
 
USB-A and RJ-9 headsets
USB-A port for headsets or one key expansion module, plus a wideband RJ-9 headset port.
 
AI noise removal
Removes background noise from outgoing audio; hearing-aid compatible wideband handset.

Technical Specifications

Identification
Brand Cisco
Product Desk Phone 9841 (Carbon Black)
Part Number DP-9841-K9=
EAN / GTIN 0889728594950
Type Desk phone (SIP, multi-platform)
Series Cisco Desk Phone 9800 Series
Colour Carbon Black
Display & Lines
Display 3.5-inch greyscale LCD, 384 x 160, backlit
Line keys 4 physical, programmable
Network & Power
Ethernet Internal 2-port 10/100/1000BASE-T switch
PoE IEEE PoE Class 2
Power adapter Cisco Power Adapter 3, sold separately
Wi-Fi / Bluetooth None
Ports & Voice
USB 1x USB-A (headset or one key expansion module)
Headset 1x RJ-9
Codecs OPUS, G.722, G.722.2, iSAC, G.711 a/µ, G.729a/b, iLBC
Audio Wideband handset, HAC, AI background noise removal
Security & Physical
Security TPM 2.0
Dimensions 214 x 214 x 49.4 mm
Weight 954 g
Operating temperature 0 to 40 °C
In the Box
Included Cisco Desk Phone 9841 (Carbon Black); Cisco does not publish a detailed box list
Not Included Power adapter (Cisco Power Adapter 3), wall-mount kit DP-9800-WMK=, key expansion module DP-9800-KEM=
Warranty
Warranty 1-Year Warranty (Singular)
Manufacturer Term Cisco publishes a one-year limited hardware warranty on this series. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration.

Frequently Asked Questions

Does the 9841 work with Webex Calling and CUCM?
Yes. Cisco publishes one device and one firmware for CUCM, Webex Calling, BroadWorks and third-party cloud calling.
Does it have Bluetooth?
No. Use a USB headset (or USB dongle) in the USB-A port, or a wired headset on the RJ-9 port. The 9851 and 9861 add Bluetooth.
Is a power adapter included?
No. Power it from a PoE switch or order the Cisco Power Adapter 3 separately.
Can I add more keys?
Yes, one DP-9800-KEM= key expansion module connects through USB-A.
Singular Expert Insight
The 9841 replaces the choice between Enterprise and Multiplatform firmware of older Cisco phones: one unit works on premises and in the cloud. Order the colour you want — DP-9841-K9= is Carbon Black, DP-9841-L-K9= is First Light. USB headsets are in our office & VoIP headsets and Gigabit PoE in our PoE switches.

Buyer’s Guide

Buy it if

you want a future-proof Cisco desk phone that works whether you stay on CUCM or move to Webex Calling.

Skip it if

you need built-in Bluetooth — look at the 9851 or 9861.

Also consider

Cisco Desk Phone 9851 / 9861 (Bluetooth), or IP Phone 7821 Multiplatform for a basic 2-line phone.

Features - Trust - DP-9841-K9=

Colour
black
Interface
  • Ethernet
Port Speed
  • 1 Gbps
More Details
Product Code
CK50370
EAN Code
0889728594950
Manufacturer
Trust
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