The Cisco 8851 phone without 18/36 Key Expansion Module included supports Session Initiation Protocol (SIP) for signaling, Session Description Protocol (SDP), IPv4, and IPv6. The phone is optimized for use with Cisco Unified Communications Manager. This Cisco 8851 phone is a modified version that connects to your network like any other 8851 phone. The difference is the addition of Positive Disconnect On-Hook Security. Approved for use in SCIF and SAPF environments, the phone also allows the on-hook security features to be engaged while in a call providing enhanced “Hold” and “Mute” security. Speakerphone functionality is enabled on the device and is protected with the on-hook security of the positive disconnect electronics, but can be administratively disabled in the Unified Communications Manager. 

Features

• 5-inch high resolution widescreen VGA color display
• Supports a built-in 10/100/1000 Ethernet switch for PC connection
• Compatible with both IEEE 802.3af and 802.3at switch blades
• Phone supports 10 line appearances through Enhanced Line Mode feature

Included

• Cisco DTD-8851-01 IP Phone
• Handset with cord
• DTD-TPES61 AC Power Adapter

Grade A Refurbished

Functionality
Cosmetics

All refurbished items are restored to full functionality, and their grades reflect only cosmetic condition. Lower-grade products may have more visible blemishes but are rigorously tested and cleaned to ensure identical performance and warranty coverage.