Cisco
Cisco IP Phone 7811 CP-7811-K9 1-Line VoIP Phone SIP PoE
PO and Net 30 available for schools, government, hospitals, and law firms.
Description
Description
Cisco IP Phone 7811 (CP-7811-K9) — Refurbished
Save up to 70% over buying new with this professionally refurbished Cisco 7811 IP Phone. Ideal for lobbies, cafeterias, shared workspaces, and light-use office desks, the CP-7811-K9 delivers reliable, enterprise-grade VoIP communications with wideband audio clarity — backed by Reef Telecom's industry-leading 10-year warranty.
Key Features
- 1-line SIP VoIP phone for Cisco Unified Communications Manager (CUCM) environments
- 3.28" grayscale graphical display (384 x 106 pixels) for easy readability
- Wideband audio support for HD-quality voice calls
- Full-duplex speakerphone with dedicated mute button
- Four programmable soft keys and two-way navigation
- Power over Ethernet (PoE) Class 1 — no separate power supply needed
- Integrated 10/100 Ethernet switch reduces cabling costs
- Wall-mountable with dual-position foot stand included
- RJ-9 headset port for optional headset connectivity
- LED indicators for line keys, audio path, and message waiting
Compatibility
The Cisco 7811 (CP-7811-K9) is designed for use with Cisco Unified Communications Manager (CUCM) and supports SIP protocol. Compatible with Cisco on-premises, hosted, and Webex Calling deployments. Requires a Basic User Connect License (UCL).
Why Buy from Reef Telecom?
- 10-Year Warranty — the longest in the refurbished telecom industry
- Free Shipping on orders over $300
- Professionally tested, cleaned, and restored to like-new condition
- Environmentally responsible — extend equipment lifecycle and reduce e-waste
Specs & Details
Specs & Details
Shipping & Warranty
Shipping & Warranty
Free ground shipping on orders over $300. Same-day shipping on orders placed before 4PM EST.
All products include our industry-leading 10 Year Warranty backed by Reef Telecom.

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With your purchase, you’ll join a community of proactive merchants and customers dedicated to a sustainable future. Together, we've removed emissions for over 80 million deliveries and removed over 56 thousand tonnes of carbon.
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Our goal is providing the highest quality refurbished equipment to promote environmentally-conscious equipment usage through it's lifecycle.