Cisco 8851 IP Phone - Corded/Cordless with Bluetooth and 5-Way Conferencing

Designed for modern workplaces, the Cisco 8851 IP Phone delivers enterprise-grade voice quality, seamless mobility, and scalable security in a compact, versatile design. This business-class endpoint blends reliable wired performance with cordless flexibility through Bluetooth, enabling users to pair wireless headsets and mobile devices for a connected, friction-free communications experience. With Cisco Intelligent Proximity, personal mobile devices can be controlled from the desk phone, turning your laptop or smartphone into an extension of your office telephony system. The 8851 is purpose-built for small to large organizations that demand robust collaboration tools, secure provisioning, and simple deployment, while offering wall-mountable versatility to fit any office layout. Whether you’re equipping a single executive desk, a busy workspace, or an entire department, the 8851’s combination of corded reliability and cordless convenience helps teams stay connected, energized, and productive throughout the workday.

• The 8851 delivers corded reliability with the added versatility of Bluetooth for wireless headsets and mobile device pairing, enabling hands-free calls and easy device switching while maintaining crisp, clear audio quality. This enables users to move from desk to hallway, meeting room, or reception area without interrupting conversations, while still maintaining secure, enterprise-grade telephony controls. The Bluetooth integration supports secure pairing with compatible devices, ensuring seamless integration into your existing UC environment and reducing desk clutter from multiple devices.
• Five-way conferencing and high-fidelity audio bring teams together quickly and clearly. The phone supports multi-party conferences that empower project teams, sales floors, and remote workers to participate in discussions with confidence. Wideband audio, full-duplex speakerphone, and echo cancellation deliver natural voice quality even in busy environments, helping participants hear every detail and respond promptly. With intelligent conferencing controls integrated into Cisco Unified Communications Manager or compatible SIP platforms, scheduling and joining meetings becomes a streamlined part of your daily workflow.
• Cisco Intelligent Proximity and mobile telephony integration simplify how you work across devices. This feature allows call control, extension dialing, and call transfer between the desk phone and compatible mobile devices, so you can take or route calls from whichever device is most convenient. Directory access, presence information, and call history can be leveraged from the desk unit, reducing the need to juggle multiple apps and devices. This seamless mobility is particularly valuable for managers, field staff, and teams that rely on real-time collaboration while still requiring a stable, on-desk telephony experience.
• Security, scalability, and enterprise readiness define the 8851’s lifecycle in large deployments. It supports secure provisioning, TLS for signaling, and SRTP for media streams, helping protect sensitive communications. The phone is designed to work with Cisco Unified Communications Manager and other SIP-based deployments, with centralized management and firmware updates to minimize downtime and maintenance. Its robust hardware and software architecture are built to handle the demands of busy offices, long product lifecycles, and the reliability expectations of corporate IT teams.
• Flexible deployment, ergonomic design, and space-saving versatility round out the package. The 8851 is suitable for wall mounting or desktop use, giving you the flexibility to optimize workspace layouts and minimize clutter. It supports Power over Ethernet for straightforward cabling and can operate with an optional power supply in environments without PoE. A clear, color display presents call status, directories, and quick access to frequently used features, while a compact footprint ensures it fits neatly on crowded desks, reception counters, or cubicle walls. The durable, commercial-grade construction is designed for sustained daily use in support desks, executive offices, call centers, and shared workspaces.

Technical Details of Cisco 8851 IP Phone

• Phone type: Corded IP phone with integrated Bluetooth for wireless devices and headsets.
• Audio quality: Wideband audio for clear, natural voice reproduction; full-duplex speakerphone with acoustic echo cancellation.
• Display: Color display with call status, directory and quick-access features displayed for easy navigation.
• Connectivity: Ethernet (RJ-45) for network access; USB port for peripheral connections; Bluetooth 4.x for wireless pairing.
• Networking and security: SIP-based telephony compatible with Cisco Unified Communications Manager and other SIP platforms; TLS for signaling and SRTP for media protection; secure provisioning.
• Conferencing: Supports multi-party conferencing with up to five participants per call.
• Power options: Power over Ethernet (IEEE 802.3af/at) or optional external power supply for non-PoE environments.
• Mounting flexibility: Desktop use or wall-mount capability for adaptable office layouts.
• Compatibility: Designed for Cisco collaboration ecosystems and compatible SIP deployments to enable scalable, enterprise-grade telephony.
• Security and manageability: Centralized firmware updates, secure provisioning, and policy-based management to simplify large-scale deployments.

How to install Cisco 8851 IP Phone

• Unpack and identify included accessories, then verify you have the phone, base, wall-mount kit (if included), Ethernet cable, and power options.
• Connect the phone to your network via PoE when possible for power and data through a single cable, or use the optional external power supply if PoE is not available.
• Attach the desk stand or wall-mount bracket to the phone, and mount it in your preferred location—whether on a wall in a reception area or on a desk in a workroom.
• Power on the device and access the admin menu to configure its network settings, SIP server details, and provisioning method through your Cisco UC platform or SIP-based backend.
• Pair Bluetooth devices and enable Cisco Intelligent Proximity if you plan to use mobile integration—this typically involves pairing through the phone’s settings and, if required, configuring device permissions in your UC administration portal.
• Test core telephony features: place a call, answer, transfer, hold, and resume; configure directory search; and verify presence and contact synchronization with your enterprise directory.
• Update firmware to the latest available version via your management system to ensure optimal performance, security, and compatibility with your infrastructure.
• Document the device in your asset management system and assign appropriate QoS, security policies, and provisioning profiles for automatic future updates.

Frequently asked questions

• Q: Does the Cisco 8851 support Bluetooth headsets?
  A: Yes. The 8851 includes Bluetooth connectivity for wireless headsets and mobile device pairing, enabling hands-free operation and seamless mobility while maintaining call quality and security.
• Q: Can I mount this phone on the wall?
  A: Yes. The 8851 is designed to be wall-mountable or used on a desk, giving you flexible deployment options to fit any office configuration.
• Q: How many participants can join a conference call?
  A: The phone supports up to five participants in a single conference, facilitating streamlined collaboration for teams and remote workers.
• Q: Is the 8851 compatible with Cisco Unified Communications Manager?
  A: Yes. It is built to work with Cisco Unified Communications Manager and other SIP-based deployments, with centralized management and secure provisioning.
• Q: What powering options are available?
  A: The device supports Power over Ethernet for convenient cabling and can operate with an optional external power supply in environments without PoE.