Cisco 8851 SIP Phone with Multiplatform Phone Firmware - Refurbished

Engineered specifically for cloud-hosted PBX frameworks and open SIP infrastructures, the Cisco IP Phone 8851 running Multiplatform Phone Firmware delivers robust, business-grade communications, available in both brand new and fully refurbished conditions. By pairing an expansive 5-inch high-resolution widescreen VGA colour display (800 x 480 pixels) with Gigabit switching, a convenient side USB charging port, and pristine wideband audio, this advanced desktop terminal empowers executives and high-volume communication users to handle complex call management effortlessly.

*Please Note: This unit arrives preloaded with Multiplatform (3PCC) firmware, designating it exclusively for open SIP call control networks like Asterisk, BroadSoft, and Centile rather than proprietary Cisco enterprise systems.

Immersive 5-Inch Widescreen Colour Interface

Transforming how professionals interact with their desktop equipment, the device features a brilliant 5-inch high-resolution widescreen VGA colour display (800 × 480 pixels). This expansive visual workspace makes looking up corporate directory contacts, reading missed call logs, and navigating interactive XML applications remarkably straightforward, reducing eye strain during extended work hours.

Dedicated USB Charging Peripheral Port

To keep modern workspaces efficient, the terminal incorporates a convenient side USB port. This dedicated port allows users to charge mobile devices, power accessories, or integrate peripheral tools directly from the phone housing, reducing desktop clutter and keeping essential personal devices powered throughout the working day.

Optimised for Open-Standard Hosted Environments

Built to accommodate businesses operating outside traditional walled-garden ecosystems, this model marries legendary Cisco hardware durability with open-standard SIP flexibility. It integrates smoothly into modern cloud communication setups, granting administrators the freedom to pair the terminal with market-leading hosted platforms including Asterisk, BroadSoft, and Centile.

Streamlined Call Control & Multi-Line Versatility

Designed to minimise office friction and speed up daily administrative tasks, the phone provides an extensive toolkit of calling features supporting up to 10 distinct directory number lines. Users can effortlessly execute call transfers, place calls on hold, retrieve parked lines, initiate local three-way conferences, and manage group pickups. Furthermore, five dedicated programmable line and feature keys allow operators to configure speed dials or monitor specific extensions instantly.

Premium Wideband Audio Fidelity

Clear acoustic performance is essential for commercial productivity. The hardware supports wideband audio across every transmission path, handset, headset, and full-duplex speakerphone, ensuring every conversation sounds vibrant and distortion-free. Extensive codec support guarantees optimal bandwidth management across diverse enterprise networks.

Multi-Layered Enterprise Security Infrastructure

Protecting sensitive corporate networks from unauthorised access is a top priority. This terminal employs rigorous security standards, including IEEE 802.1X authentication protocols, encrypted configuration files, password login protections, and Secure Real-Time Transport Protocol (SRTP) encryption for live media streams. Mass rollouts are equally streamlined via automated TFTP and HTTPS server provisioning.

Features

• Hosted VoIP Readiness - Fully validated for stable performance within leading third-party open SIP server ecosystems
• Expansive 5-Inch Colour Screen - Features an 800 x 480 pixel widescreen display for exceptional menu navigation, visibility, and XML app usage
• Side USB Charging Port - Provides power output to charge mobile devices or connect external desktop peripherals
• High-Capacity Line Handling - Supports up to 10 distinct SIP registrations backed by five dedicated programmable line keys
• Comprehensive Codec Versatility - Supports industry-standard audio formats including G.722, iLBC, and OPUS for crystal-clear wideband voice clarit
• Secure File Provisioning - Defends administrative settings against tampering via encrypted configuration files and secure web protocols
• Integrated Gigabit Switching - Features an internal 2-port 10/100/1000 Ethernet switch supporting Power over Ethernet (IEEE 802.3af/at PoE) for a clutter-free desk setup

Technical Specifications

Display and Build

• Display - 5-inch high-resolution widescreen VGA backlit colour display (800 × 480 pixels)
• Line Keys - 5 programmable line keys (supporting up to 10 DN lines)
• Protocol Support - Session Initiation Protocol (SIP)
• Supported Platforms - Asterisk (1.8+), BroadSoft (19sp1 through 21sp1), Centile (Istra SP 9.2)

Audo & Connectivity

• Audio Codecs - G.711 (A-law and $\mu$-law), G.722, G.722.2, G.729ab, iLBC, iSAC, OPUS
• Peripheral Ports - RJ-9 headset port, auxiliary port for electronic hookswitch, and a side USB port for charging and accessories

Network and Security

• Ethernet Switch - Integrated Gigabit (10/100/1000) switch with dual ports for PC pass-through
• Power Options - IEEE 802.3af/at Power over Ethernet (PoE) or optional Power Cube
• Security Features - 802.1X authentication, SRTP, TLS, HTTPS provisioning, password login, and encrypted configuration files

Standard Package Contents

• Cisco 8851 SIP Phone with Multiplatform Firmware
• Handset and Curly Cord
• Network Cable
• Dual Position Desktop Stand
• User Documentation

*Please note - as this is a refurbished product package contents may vary from the above