Cisco VoIP Dual Port Analog Telephone Adapter. Model: (ATA191-K9). Black Version.

Features:
- Voice quality: Offers clear, natural-sounding voice quality via advanced preprocessing, high-performance echo cancellation, Voice Activity Detection (VAD), and Comfort Noise Generation (CNG)
- Central provisioning and configuration: Eases deployment via a Cisco Unified Communications Manager central interface
- Security: Provides a complete security solution for both media and signaling
- Problem reporting (PRT): Improves serviceability with a dedicated PRT button for problem reporting and log collection
- IPv6: Enables an IPv4/IPv6 dual stack to help migration to IPv6