Cisco Desk Phone 9871 (DP-9871) – Key Features 1. Display & User Interface • 5-inch color touchscreen with resolution 1280 × 720. • Easy navigation with touch UI + navigation keys + Home button. • Top 360° LED and Front Arc LED indicators show call status, messages, and notifications.  2. Connectivity • Dual-port Gigabit Ethernet (10/100/1000) for phone and PC connection. • Dual-band Wi-Fi (2.4 / 5 GHz) on the standard model. • Bluetooth 5.2 for wireless headsets. • USB-A and USB-C ports for headsets or charging devices.  3. Audio & Call Quality • HD voice audio with advanced codecs (OPUS, G.722, G.711, G.729, etc.). • AI-based noise removal for clearer calls. • Full-duplex speakerphone for hands-free communication.  4. Collaboration & Productivity • One Button to Push (OBTP) – join meetings instantly from the phone screen. • Hot-desking & desk reservation support for shared offices. • Configurable Action Button for emergency alerts, help desk, paging, etc.  5. Platform Compatibility Works with multiple Cisco and third-party systems: • Cisco Unified Communications Manager (CUCM) • Webex Calling • BroadWorks • Open SIP / 3rd-party cloud calling platforms  6. Security • Trusted Platform Module (TPM 2.0) • TLS 1.3 encryption • Secure boot & image authentication for enterprise security.  7. Power & Hardware • Powered via PoE (Power over Ethernet) or optional power adapter. • Supports Key Expansion Modules (KEM) for additional programmable buttons. • Up to 128 programmable keys / lines.  ⸻