Save $6 instantly
✅ Supports Webex Calling
✅ 3.5" Graphical Display
✅ 396 x 162 Pixel Resolution
✅ Supports Wideband Audio
✅ Full-Duplex Speakerphone
✅ 2-Port Cisco Ethernet Switch
✅ Gigabit BASE-T Ethernet Network
✅ RJ-9 Headset Port
✅ Wall Mount Option
Same Day Shipping - Arrives in 3-5 Business Days /returns-icon.jpg){kind=icon}
30-day Returns 
Have one to sell? Click here to sell to us
The Cisco 7821 IP Phone (CP-7821-K9) is a reliable, cost-effective business desk phone for everyday voice communication in small to large enterprises. Wideband audio, a full-duplex speakerphone, two programmable line buttons and a 3.5-inch illuminated display make calling easy and effective. The Cisco 7821 is a useful option for businesses that want solid IP telephony without needless complication since it is designed for flexible deployment and works with Cisco on-premises, hosted, Webex Calling, and third-party call control settings.
• 2 programmable line keys for handling calls and shared line appearances.
• 3.5-inch backlit display with a clear pixel-based interface for easy navigation.
• Wideband audio and full-duplex speakerphone for natural, high-quality conversations.
• 2-port Ethernet switch for daisy-chaining a PC and reducing desktop cabling.
• Multiplatform support for Cisco and approved third-party call control systems.
• EHS headset support and RJ-9 headset connectivity for hands-free use.
• Desk-mount or wall-mount installation options for flexible placement.
• Fixed keys for voicemail, conference, directory and other core calling functions.
🗹 Delivers clear, dependable calling for everyday business communication.
🗹 Reduces desk clutter by combining phone and PC connectivity through the built-in Ethernet switch.
🗹 Improves productivity with quick-access keys and simple call handling features.
🗹 Fits mixed telecom environments due to multiplatform firmware support.
🗹 Helps businesses control costs with a practical feature set and easy deployment.
🗹 Supports flexible office setups with wall-mount and desk-mount installation options.
| Manufacturer | Cisco |
| Manufacturer Part Number | CP-7821-K9 |
| Product Name | Cisco 7821 IP Phone |
| Product Type | VoIP Phone |
Call Services | Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Message Waiting Capability |
Dialer Type | Keypad |
Dialer Location | Base |
Conference Call Capability | Yes |
Speakerphone | Yes (digital duplex) |
Menu Operation | Yes |
Programmable Buttons Qty | 2 |
Indicators | Voice message waiting indicator, speakerphone indicator, headset |
Firmware Upgradable | Yes |
Additional Functions | Call timer |
Additional Features | Music on hold |
Main Features | Multiple VoIP protocol support, integrated Ethernet switch |
VoIP | Yes |
VoIP Protocols | SIP, SRTP |
Voice Codecs | G.722, G.729ab, G.711u, G.711a, iLBC |
Lines Supported | 2 lines |
Quality of Service | IEEE 802.1Q (VLAN), IEEE 802.1p |
IP Address Assignment | DHCP, static |
Security | IEEE 802.1X |
Power Over Ethernet (PoE) Support | Yes |
Network Protocols | Cisco Discovery Protocol (CDP), SRTP |
Network Ports Qty | 2 x Ethernet 10Base-T/100Base-TX |
Compatible Software | Cisco Unified Communications Manager 8.5.1 or later, Cisco Hosted Collaboration Solution |
Network Features | Lightweight Directory Access Protocol (LDAP) |
Type | LCD display - monochrome |
Display Location | Base |
Diagonal Size | 3.5" |
Display Resolution | 396 x 162 pixels |
Backlit | Yes |
Display Languages | Danish, Hebrew, Hungarian, Czech, Croatian, Slovenian, Thai, Slovak, Brazilian Portuguese, English, German, French, Italian, Norwegian, Portuguese, Polish, Finnish, Swedish, Russian, Spanish, Dutch, Greek, Turkish, Arabic, Bulgarian, Latvian, Lithuanian, Estonian, Serbian, Romanian, Catalan, Japanese, Chinese, Korean |
Connections | Headset jack |
Placing / Mounting | Wall-mountable, table-top |
Compliant Standards | CISPR 22 Class B, CISPR 24, EN 61000-3-2, EN 61000-3-3, EN55024, EN55022 Class B, ICES-003 Class B, AS/ACIF S004, FCC Part 68, EMC, CS-03, UL 60950-1 Second Edition, EN 60601-1-2, FCC CFR47 Part 15 B, GB 4943, AS/NZS 60950, CSA C22.2 No. 60950-1 Second Edition, EN 60950-1 Second Edition, IEC 60950-1 Second Edition, VCCI Class B |
Width | 8.1 in |
Depth | 1.1 in |
Height | 8.1 in |
Weight | 30.6 oz |
Service & Support | Limited warranty - replacement - 1 year |
It is a business VoIP desk phone designed for enterprise communication and unified collaboration.
Yes, it supports SIP-based VoIP and unified communications platforms.
Yes, it features a high-contrast grayscale display for call management and navigation.
It delivers wideband HD audio for clear and professional voice communication.
Yes, it is designed for offices, branch locations, administrative staff and shared workspaces.
Yes, it supports multiple line appearances for business communication needs.
Yes, it includes full-duplex speakerphone functionality for hands-free communication.
Yes, it supports compatible business headsets.
Yes, it includes conferencing and advanced call management capabilities.
Yes, it integrates with Cisco VoIP and collaboration environments.
Yes, it features dual Ethernet ports for network connectivity.
Yes, Cisco management platforms support centralized provisioning and administration.
Yes, firmware updates are supported for enhanced functionality and security.
Yes, it is optimized for efficient power usage in enterprise deployments.
Yes, it supports modern business communication and collaboration workflows.
Yes, it is built for reliable continuous enterprise operation.
Yes, it supports hold, transfer, conferencing, voicemail and directory functions.
Yes, it is suitable for common areas and shared office environments.
Yes, its intuitive interface simplifies navigation and call handling.
Yes, with Cisco VoIP compatibility, enterprise scalability and unified communications support, it supports long-term business communication needs.
by Alisson R.
Easy to use and very convenient. Also, it looks great. This supplier is so good that I don't find any problem in this order.
