Cisco PVDM4-256 Voice and Fax DSP Module

Usage Area

The Cisco PVDM4-256 is a 256-channel DSP module designed for deployment in Cisco 2900 and 3900 Series Integrated Services Routers (ISRs). It is used for packet voice and fax processing, enabling high-density voice termination, conferencing, and transcoding within enterprise branch and campus networks. The module supports digital signal processing tasks essential for unified communications deployments, including voice compression and echo cancellation.

Construction Features

• High-density digital signal processor (DSP) module with 256-channel capacity
• Designed for installation into the PVDM slot on Cisco 2900 and 3900 Series ISRs
• Supports concurrent packet voice and fax processing operations
• Compatible with PVDM2 adapter modules for slot integration
• Modular form factor for straightforward field replacement and upgrade
• Engineered for reliable operation in enterprise network environments

Technical Parameters

• Model: PVDM4-256
• MPN: PVDM4-256
• Brand: Cisco
• Channel capacity: 256 channels
• Function: Packet voice and fax DSP processing
• Compatibility: Cisco 2900 and 3900 Series ISRs
• Adapter support: Compatible with PVDM2-ADPTR= for PVDM slot integration

Standards & Certification

The module complies with Cisco's proprietary hardware specifications for the PVDM4 family. It is certified for use within Cisco Integrated Services Router platforms, meeting industry requirements for enterprise voice and fax signal processing. The module adheres to Cisco's internal quality and interoperability standards for network equipment.