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Cisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0 (DP-9841-K9) | New

Cisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0 (DP-9841-K9) | New

SKU: DP-9841-L-K9-N
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Overview

Overview of Cisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0 (DP-9841-K9) | New

The Cisco Desk Phone 9841 (DP-9841-K9) with Trusted Platform Module (TPM) 2.0 is a dependable and safe VoIP phone made for contemporary businesses looking for reliable phone service with cutting-edge security. The 9841, which supports up to 16 SIP lines and has a 3.5-inch backlit grayscale LCD display and four customizable line keys, is perfect for professionals with hectic schedules that require effective call handling. It easily connects to Webex Calling, Cisco Unified Communications Manager and other external platforms. The phone has a full-duplex speakerphone, wideband audio codecs and AI-powered noise cancellation for crystal-clear conversations even in busy settings. With TLS 1.3, SRTP, FIPS 140-2 compliance and TPM 2.0 hardware encryption, security is crucial. Its eco-friendly design also complies with contemporary sustainability standards by using 74% post-consumer recycled plastic and being ENERGY STAR certified. This phone easily supports flexible and hybrid work environments with capabilities like hot desking and one-button Webex meeting joining.


Key Features of Cisco Desk Phone 9841


3.5-inch Backlit Grayscale LCD (384 x 160) with clear call information and easy navigation in various lighting conditions.

Supports Up to 16 SIP Lines with four programmable line keys with tri-color LED for versatile and efficient call handling.

Advanced Audio Technology with AI-based noise removal, wideband codec support (Opus, G.722, G.729, iLBC, G.711) and bass-enhanced speakerphone for superior HD voice quality.

Integrated 2-Port Gigabit Ethernet Switch that enables seamless network connectivity and easy integration with computers or other devices.

USB-A Port with plug-and-play support for USB headsets and Bluetooth dongles, simplifying peripheral connectivity.

Hot Desking & Desk Reservation with personalized device access for shared workspaces and hybrid office models.

One Button to Join (OBTJ) with quick access to Cisco Webex meetings directly from the phone interface.

Robust Security with Trusted Platform Module (TPM) 2.0, TLS 1.3, SRTP encryption and FIPS 140-2 compliance offer enterprise-grade call and device protection.

Sustainable Design that is constructed with 74% post-consumer recycled plastic and ENERGY STAR certified to reduce environmental impact.

Hearing Aid Compatible (HAC) with accessible design ensuring inclusivity for all users.


Benefits of Cisco Desk Phone 9841


🗹 TPM 2.0 and modern encryption standards secure sensitive corporate communications against unauthorized access.

🗹 Advanced audio features and noise cancellation ensure clear conversations, reducing fatigue and misunderstandings.

🗹 Supports wired, hybrid, and cloud calling environments with seamless integration to Cisco and third-party platforms.

🗹 Programmable keys, intuitive interface, and one-button meeting access boost productivity and ease of use.

🗹 Hot desking and desk reservation features facilitate flexible, shared workspace utilization.

🗹 ENERGY STAR certification and use of recycled materials align with sustainability goals while lowering power costs.

🗹 Hearing aid compatibility and multi-language support accommodate diverse workforce needs.

Specifications

Specifications for Cisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0 (DP-9841-K9) | New

ManufacturerCisco
Manufacturer Part NumberDP-9841-K9
Product NameCisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0
Product TypeVoIP Phone
Compatible Platforms
Cisco BroadWorks, Cisco Webex Calling, Cisco Webex Dedicate Instance (DI), Asterisk
Integrated Components
Trusted Platform Module (TPM) 2.0
Weight
33.65 oz
Body Color
First light
Body Material
ABS polycarbonate, 74% post-consumer recycled plastic
Wireless Interface Provided
NFC
Call Services
Voice Mail, Caller ID, Call Waiting, Call Hold, Call Transfer, Call Forwarding, Call park/pickup
Caller ID Type
Caller ID/call waiting
Dialer Location
Base
Conference Call Capability
Yes
Speakerphone
Yes
Programmable Buttons Qty
4
Volume Control
Yes
Indicators
Speakerphone indicator, headset, mute indicator, select indicator, line status indicator, status, busy lamp field (BLF)
Additional Functions
One button to join (OBTJ), QR code access, conference mode, mute, Music on hold, Do not disturb, call recording, sleep mode, Kensington security slot
Main Features
Integrated Ethernet switch
VoIP
Yes
VoIP Protocols
SIP, SDP, RTCP, RTP, SRTP
Voice Codecs
Opus, G.722, G.722.2, iSAC, G.711a-law, G.711μ-law, G.729a, G.729b, iLBC
Lines Supported
4 lines
Quality of Service
IEEE 802.1Q (VLAN)
IP Address Assignment
DHCP, static
Security
IEEE 802.1X, EAP-FAST, EAP-TLS, FIPS 140-2, TLS 1.3, SRTP
Power Over Ethernet (PoE) Support
Yes
Network Protocols
IPv4, IPv6, DHCP, GARP, DNS, TFTP, HTTPS, VLAN, RTP, RTCP, Cisco Discovery Protocol (CDP), Link Layer Discovery Protocol (LLDP), Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED)
Network Ports Qty
2 x Ethernet 10Base-T/100Base-TX/1000Base-T
Compatible Software
Cisco WebEx, Cisco Unified Communications Manager
Voice Features
Acoustic echo cancellation (AEC), forward error correction (FEC), automatic gain control (AGC), comfort noise generation (CNG), voice activity detection (VAD), packet loss concealment (PLC), silence suppression, acoustic shock protection, adaptive jitter buffer (AJB), dual tone multi-frequency (DTMF), HD audio, ultrasonic support
Network Features
Class 2 PoE
Type
LCD display - grayscale
Display Location
Base
Diagonal Size
3.5"
Display Resolution
384 x 160 pixels
Backlit
Yes
Display Languages
Brazilian Portuguese, Catalan, Czech, Danish, Dutch, Finnish, French, French Canadian, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian, Chinese (simplified), Chinese (traditional), Chinese (Traditional, Hong Kong), Spanish (Columbia), UK English, US English
Connections
Headset jack / RJ-9 ¦ 2 x network / RJ-45 ¦ USB / 4 pin USB Type A ¦ Console
Hearing Aid Compatible
Yes
Placing / Mounting
Desktop
Cables Included
Network cable
ENERGY STAR Certified
Yes
Power Consumption
2.35 W (power adapter, display off mode), 1.95 W (PoE, display off mode), 0.25 W (power adapter, deep sleep mode), 0.61 W (PoE, deep sleep mode)
Width
8.4 in
Depth
8.4 in
Height
1.9 in
Weight
33.65 oz

User Guides

Frequently Asked Questions

Cisco Desk Phone 9841 VoIP Phone with Trusted Platform Module (TPM) 2.0 (DP-9841-K9)
Frequently Asked Questions (FAQ's)



What type of display does the Cisco 9841 have?
  • It features a 3.5" color screen with an intuitive interface.
  • How many lines does the phone support?
  • It supports up to 4 lines or extensions for multi-tasking users.
  • What makes TPM 2.0 important in a desk phone?
  • TPM 2.0 encrypts and secures sensitive data, ensuring a tamper-resistant environment.
  • Is the 9841 compatible with Cisco Webex Calling?
  • Yes, it works with Cisco Webex Calling and other cloud-based services.
  • Can this phone be used without a PoE switch?
  • Yes, but an optional AC power adapter is required if PoE is unavailable.
  • Does it support wideband audio on speakerphone?
  • Yes, the speakerphone and handset both support HD wideband audio.
  • Can I use third-party headsets?
  • Yes, it supports both USB and RJ-9 headset connections.
  • What VoIP protocols are supported?
  • The phone supports SIP and is fully optimized for CUCM environments.
  • Is there a voicemail indicator?
  • Yes, a visual message waiting indicator alerts you to new voicemails.
  • Is the Cisco 9841 good for hot-desking or shared spaces?
  • Absolutely. Its compact footprint and intuitive features make it ideal for shared environments.
  • Does it support remote firmware updates?
  • Yes, IT admins can manage firmware and settings remotely via CUCM or cloud systems.
  • Is the screen touch-sensitive?
  • No, the Cisco 9841 does not have a touchscreen, but it has a navigable color display.
  • Can I disable unused ports or features for added security?
  • Yes, administrators can lock down specific ports and functionalities via the control panel.
  • Is the Cisco 9841 HAC (Hearing Aid Compatible)?
  • Yes, it meets hearing aid compatibility standards.
  • Does the 9841 include call forwarding and DND features?
  • Yes, call forwarding, DND and other standard VoIP features are included.
  • What power consumption does this model have?
  • The phone is energy-efficient and consumes minimal power, especially in idle mode.
  • Can I use the Cisco 9841 for remote workers?
  • Yes, it's compatible with VPN setups and secure remote provisioning.
  • What network ports are available?
  • It includes dual Gigabit Ethernet ports—one for LAN and one for PC passthrough.
  • Is the device wall-mountable?
  • Yes, with a separately sold wall mount kit.
  • Does the Cisco 9841 support call waiting and conferencing?
  • Yes, it supports standard VoIP features including call waiting, 3-way conferencing and call transfer.
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