Quick tech specs
- Generation 128-Channel High-Density Packet Voice Digital Signal Processor Module (Factory Upgrade from 32-Channel)
- for P/N: C1-CISCO4331/K9, ISR4331-AXV/K9, ISR4331-V/K9, ISR4331-V/K9-RF, ISR4331-VSEC/K9
- Voice DSP module
Know your gear
The Cisco Fourth-Generation Packet Voice Digital Signal Processor Module (PVDM4) enables Integrated Services Routers (ISRs) to provide rich-media capabilities such as high-density voice connectivity, conferencing, transcoding, media optimization, transrating, and secure voice.