Specifications Phone Features General Manufacturer : Cisco Model : IP Phone 7861 Type : IP Phone PoE (Power over Ethernet) Hardware Display : 396 x 162 pixel resolution monochromatic LCD screen. Keys : 16 programmable line keys with LED Keys fixed function for messages, column, settings, call transfer, conference, speaker, mute, volume. Four-way navigation keys. Speaker: Speaker and full-duplex microphone. Headphone port: Yes, with jack RJ-9. Ethernet Port connectivity: 2 Ethernet ports 10/100 (one for network connection and one for pass-through connection to a PC). PoE (Power over Ethernet) : Supports IEEE 802.3af (class 1). Supported Audio Codec: G.711a/?, G.722, G.729a, iLBC. Vivavoce: Yes, full-duplex. Software and Functionality Network Protocol : SIP (Session Initiation Protocol). : Ability to store local and network contacts. Call log: Access to recent call lists (incoming, outgoing, lost). Call Functions : Waiting for Transfer Calls Three-way Conference Recomposition Number Quick Call Lock Anonymous Calls Do Not Disturb (DND). Power supply : Optional power supply (not included in the package). Dimensions and Weight Dimensions (L x P x A) : Approximately 207 x 209 x 28 mm. Weight: Approx. 1.27 kg. Compatibility Compatibility : Part of Cisco Unified IP Phone 7800 series, compatible with Cisco Unified Communications Manager and other SIP compatible VoIP systems. Security Security : Network Security Certifications: IEEE 802.1X, EAP-MD5, EAP-TLS. Encryption for authentication and communication: SIP over Transport Layer Security (TLS), Secure Real-time Transport Protocol (SRTP). These features make the Cisco IP Phone 7861 suitable for working environments that require a robust and flexible VoIP solution with power support via PoE.