Cisco Fourth-Generation 128-Channel High-Density Packet Voice Digital Signal Processor Module (Factory Upgrade from

The Cisco Fourth-Generation Packet Voice Digital Signal Processor Module (PVDM4) enables Cisco 4451-X Integrated Services Routers (ISRs) to provide rich-media capabilities such as high-density voice connectivity, conferencing, transcoding, media optimization, translating, and secure voice in Cisco Unified Communications Solutions.