Key Features
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.
Benefits
- 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 |
Frequently Asked Questions
Cisco 7821 IP Phone (CP-7821-K9) | Recertified
What is the Cisco 7821 IP Phone used for?
Does it support VoIP communication?
Does it include a display?
How is the audio quality?
Is it suitable for business environments?
Does it support multiple lines?
Does it include a speakerphone?
Can headsets be connected?
Does it support conferencing features?
Is it compatible with Cisco unified communications platforms?
Does it include Ethernet connectivity?
Can IT teams manage it centrally?
Can firmware be updated?
Is it energy efficient?
Can it support office collaboration environments?
Is it durable for long-term business use?
Does it support call management features?
Can it be deployed in shared workspaces?
Is it easy to use?
Is it future-proof?
Cisco 7821 IP Phone (CP-7821-K9) | Recertified
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