Software compatibility: Cisco Collaboration Endpoint Software Version 9.12 or later, or Cisco Webex RoomOS, Firewall traversal: Cisco Expressway technology; H.460.18, H.460.19 firewall traversal, Video standards: H.264, H.265, H.263 for TANDBERG MXP interop only, Audio features: High-quality 45-20.000Hz; Eight separate acoustic echo cancellers; Automatic Gain Control (AGC); Automatic noise reduction; Active lip synchronization; Full-range multichannel and bass speakers, Dual stream: H.239 (H.323) dual stream; Binary Floor Control Protocol (BFCP) (SIP) dual stream; Supports resolutions up to 3840 x 2160p15 (4Kp15)