Cisco 128-Channel Voice DSP Module - For Voice

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, transrating, and secure voice in Cisco Unified Communications Solutions. Cisco platform availability. The PVDM4 modules are supported on Cisco 4451-X platforms. The platform has one slot for the PVDM4 module. You can plug any additional PVDM4 modules onto the T1/E1 NIMs. Voice-quality management. The PVDM4 modules perform compression, voice-activity-detection, jitter-management, and echo-cancellation functions. The echo cancellation offered in the PVD M4 modules has a tail length of 128 milliseconds (ms) and complies with ITU-T G.168. Energy-saving feature. The PVDM4 DSPs offer multiple power-saving modes, including a power-saver mode when the module is not in use. In power-saver mode each PVDM4 can save up to 5 watts of power.