Cisco
Cisco IP Phone 7811 1-Line VoIP SIP Phone CP-7811-K9
PO and Net 30 available for schools, government, hospitals, and law firms.
Description
Description
Cisco IP Phone 7811 (CP-7811-K9) — Enterprise VoIP Communication
The Cisco IP Phone 7811 delivers simple, highly secure, and cost-effective VoIP communications for small to large businesses. This single-line SIP phone from the Cisco 7800 Series is ideal for lobbies, common areas, conference rooms, and light-use desks — backed by Reef Telecom's industry-leading 10-year warranty.
Key Features & Specifications
- 1-Line SIP Phone — Session Initiation Protocol (SIP) support
- Grayscale Display — 3.2" (384 x 106) pixel-based screen for clear call information
- Wideband Audio — Enhanced voice clarity with full-duplex speakerphone
- Power over Ethernet — PoE Class 1 (IEEE 802.3af) with Cisco EnergyWise support
- Dual 10/100 Ethernet Ports — Integrated switch with PC passthrough to reduce cabling
- LED Indicators — For audio path, line keys, select key, and message waiting
- Four Soft Keys & Two-Way Navigation — Intuitive scroll toggle and dedicated fixed keys
- Wall Mountable — Dual-position foot stand included; optional wall mount kit available
- RJ9 Headset Port — Connect an optional headset for hands-free use
- Secure Communications — SRTP encryption, 802.1x authentication, HTTPS provisioning
Why Buy from Reef Telecom?
- ✅ 10-Year Warranty — The longest in the industry, included at no extra cost
- ✅ Free Shipping on orders over $300
- ✅ New, factory-sealed unit (CP-7811-K9)
The Cisco 7811 is compatible with Cisco Unified Communications Manager, Webex Calling, and third-party hosted call control platforms. An ideal entry-level IP phone for enterprise deployments, office expansions, or replacing legacy analog systems.
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.

We clean up after ourselves.
Ecommerce deliveries have a carbon footprint. That's why we support verified projects that remove carbon from the air.
Every delivery’s carbon footprint is calculated based on weight, shipping method, and distance traveled. We neutralize these emissions by purchasing verified carbon removal credits from groundbreaking projects.
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 81 million deliveries and removed over 56 thousand tonnes of carbon.
We work with a network of pioneering carbon removal companies that have been vetted by the commerce platform Shopify.
Reef Telecom Proudly Supports
-
Ocearch
2026 Monthly Shark Hero -
Coral Restoration Foundation
2025 Staghorn Donor -
Ocean Conservancy
2025 Donor
Smart IT. Clean Oceans. Boundless Possibilities.
Our goal is providing the highest quality refurbished equipment to promote environmentally-conscious equipment usage through it's lifecycle.