Cisco
Cisco 7821 2-Line IP Phone CP-7821-K9
PO and Net 30 accepted for schools, government and healthcare.
Couldn't load pickup availability
Power: —
How will you power this phone?
Most desk phones run on Power over Ethernet (PoE). If your switch or injector provides PoE, you need nothing else. No PoE? Add the power supply made for this phone.
We don't stock this phone's power supply online yet — if you don't have PoE, check out as-is and we'll confirm power with you before it ships.
Blind shipping available — your address on the label, no Reef-branded paperwork in the box. Choose it in your cart. How it works
Every Reef phone already includes our free 10-year warranty with advance replacement. Reef Support adds the people: expert Cisco engineers on call, a guaranteed response time, and onsite dispatch when a phone goes down.
Response time
Term
Coverage carries a 20-phone minimum — the contract quantity adjusts automatically.
Choose a response time and a term above to add coverage — or select "No support plan."
Coverage activates once we register your serial number(s) — we'll email you a secure form right after checkout. Buying for a tax-exempt organization? Your exemption carries over at checkout.
What's included
- Cisco 7821 IP phone
- Handset with cord
- Dual-position foot stand
- Network cable
- Setup sheet
Not included
- Power supply — not included (power via PoE, or the Cisco CP-PWR-CUBE-3 power supply sold separately)
Description
Description
Cisco IP Phone 7821 (CP-7821-K9) — Enterprise-Grade 2-Line VoIP Phone
Save up to 70% over new with this professionally refurbished Cisco 7821 IP Phone. Ideal for offices, call centers, and enterprise UC deployments, the CP-7821-K9 delivers crystal-clear wideband audio, a high-resolution backlit display, and secure SIP communications — all backed by Reef Telecom's industry-leading 10-year warranty.
Key Specifications
- 2 Programmable Line/Feature Keys — supports directory numbers or speed dial
- 3.5" Greyscale Display — 396 x 162 pixels with white backlight
- Wideband Audio (G.722) — superior voice quality via handset, speakerphone, or headset
- Dual 10/100 Ethernet Ports — integrated Ethernet switch for single-cable desktop deployment
- PoE Class 1 (IEEE 802.3af) — power and data over one cable; Energy Star certified
- SIP Protocol Support — with SRTP encryption and TLS signaling security
- Full-Duplex Speakerphone — hands-free conferencing built in
- RJ9 Headset Port + EHS Support — flexible headset connectivity options
- Fixed Function Keys — one-touch messaging, directory, hold, transfer, and conference
- Wall Mountable — includes dual-position foot stand for desk or wall use
Compatibility
- Cisco Unified Communications Manager (CUCM) 8.5.1 and later
- Cisco Business Edition 6000 — 8.6.2 and later
- Cisco Hosted Collaboration Solution (HCS)
- Cisco Unified Survivable Remote Site Telephony (SRST) 8.x+
- Third-party SIP call control platforms
- Requires Basic User Connect License (UCL)
Why Buy from Reef Telecom?
Every refurbished Cisco 7821 is thoroughly inspected, tested, and restored to full working condition. Your purchase includes a 10-year warranty and free shipping on orders over $300. Reduce e-waste and IT costs without sacrificing quality — choose Reef Telecom for sustainable, enterprise-ready telecom equipment.
Specs & Details
Specs & Details
- Condition
- Certified Refurbished
- Warranty
- 10-Year Reef Telecom Warranty
- Manufacturer Part Number
- CP-7821-K9
- Reef SKU
- CP-7821-K9-R
- UPC
- 882658621840
- Brand
- Cisco
Shipping & Warranty
Shipping & Warranty
Free ground shipping on orders over $300 (contiguous US). Same-day shipping on orders placed before 4 PM EST.
All products include our industry-leading 10 Year Warranty backed by Reef Telecom.
Reef Telecom Proudly Supports
-
OCEARCH
2026 Monthly Shark Hero -
Coral Restoration Foundation
Staghorn Donor -
Ocean Conservancy
2026 Donor
- Choosing a selection results in a full page refresh.
- Opens in a new window.