Full specification
Display: 3.5-inch backlit grayscale LCD, 384 x 160 resolution
Line Keys: 4 programmable physical line keys
Maximum SIP Lines: 16 (Webex Calling and Open SIP)
Audio: HD voice with AI noise removal, hearing aid compatible handset
Connectivity: Dual Gigabit Ethernet ports (10/100/1000), USB-A port for headsets
Power: IEEE Power over Ethernet (PoE) class 2; optional power adapter available
Security: FIPS 140-2, Trusted Platform Module (TPM) 2.0, TLS 1.3, Secure Boot
Platforms Supported: Cisco Unified Communications Manager (CUCM), Webex Calling, BroadWorks, 3rd Party Cloud Calling (OpenSIP)
Software: PhoneOS
Dimensions: 8.43 x 8.43 x 1.94 inches (214.06 x 214.24 x 49.4 mm)
Materials: 74% post-consumer recycled plastic
Certifications: ENERGY STAR certified