Cisco PVDM4-256 256-Channel High-Density Voice DSP Module for ISR PVDM4256

Description:

The Cisco PVDM4-256 256-Channel High-Density Voice DSP Module is used in Cisco Integrated Services Router (ISR) 4000 Series platforms to provide digital signal processing resources for voice, video, and unified communications services. Commonly installed in enterprise VoIP gateways, unified communications systems, and branch office routing infrastructures supporting IP telephony, conferencing, and media processing applications. Maintenance teams and system integrators use this part for voice capacity upgrades, system expansion, infrastructure modernization, or replacement of existing DSP modules in Cisco ISR deployments.

Applications:

The Cisco PVDM4-256 module provides high-density digital signal processing capabilities for enterprise voice and media services within Cisco ISR 4000 Series routers. It supports VoIP call processing, voice transcoding, conferencing, encryption, and media resource management in unified communications environments. This module is widely used in enterprise IP telephony networks, SIP trunking gateways, branch office communication infrastructure, and contact center systems requiring scalable voice processing and reliable media service performance.

Technical Specifications:

• Brand: Cisco
• Manufacturer Part Number (MPN): PVDM4-256
• Product Type: High-Density Voice DSP Module
• DSP Architecture: PVDM4
• Maximum Voice Channels: Up to 256 channels
• Supported Platforms: Cisco ISR 4000 Series Routers
• Voice Processing Functions: Transcoding, conferencing, media termination, encryption support
• Codec Support: G.711, G.729, and other VoIP codecs
• Integration Type: Internal router module
• Application Support: VoIP gateways, SIP trunking, unified communications systems
• Manufacturer: Cisco Systems

Common Replacements:

• Cisco PVDM4-128 Voice DSP Module
• Cisco PVDM4-64 Voice DSP Module
• Cisco PVDM4-32 Voice DSP Module