| Product Type | Network Adapters |
| Form Factor | Plug-In Module |
| Weight | Approx. 50 g |
| Power Consumption | 4.85 Watt |
| For Use With | Cisco Catalyst 8000 Edge Platforms Family and the Cisco 4000 Series Integrated Services Routers (ISRs) |
| Connectivity Technology | Wired |
| Digital Signal Processor (DSP) Type | PVDM4 Digital Signal Processor |
| Maximum Channels Supported | 256 Channels |
CISCO PVDM4-256 256-Channel DSP Module for Cisco Edge & ISR Routers

Key Benefits
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- Delivers scalable voice DSP functionality in Cisco enterprise routers, enabling efficient VoIP deployments.
- Compact, plug-in design with 4.85W power draw fits neatly into existing routing infrastructure.
- TAA-compliant and manufactured in trusted locations, ensuring qualification for federal or regulated industry use.
Product Overview
The CISCO PVDM4-256 is a robust 256-channel DSP plug-in module for Cisco Catalyst 8000 Edge Platforms and the 4000 Series ISRs. The module fits into on-board motherboard or T1/E1 slots and enables the transformation of TDM digital voice into IP packets, supporting efficient VoIP deployments. With a low power consumption of 4.85W and compact dimensions, it’s ideal for space-constrained enterprise environments. Additionally, the TAA compliance and origin in Mexico/United States make it suitable for federal contracts and secure network applications.
Specifications
Product Overview
Wireless Features
| Wireless Capability |
Compliance & Origin
| Country of Origin | Mexico / United States |
| TAA Compliant | Yes |
| Certifications | RoHS, CE, FCC Part 15 Class B |
Advanced Security Features
| Secure Voice Packetization | Yes – supports secure VoIP through native ISR/Catalyst voice services |
| Packet Voice Services | Yes – required for Cisco voice gateway functions |
| SIP & MGCP Support | Yes – with ISR/IOS configuration |
| Media Encryption Support | Available via router configuration and capabilities |
Interfaces
| Interfaces & Connections | On-board motherboard or T1/E1 module slot |
| Voice Interface Support | T1/E1 |
| Applicable Modules | NIM (Network Interface Modules) or motherboard slots on ISR/Catalyst platforms |
Physical & Environmental
| Width | 2.5 Inch |
| Depth | 2.62 Inch |
| Height | 0.67 Inch |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Storage Temperature | -40°F to 158°F (-40°C to 70°C) |
| Operating Humidity | 10% to 95% noncondensing |
| Storage Humidity | 5% to 95% noncondensing |
| Cooling Method | Passive |
Cloud Management & Licensing
| Cloud Management | |
| Licensing Requirements | No additional license required for DSP module itself; voice services may require IOS licensing |
| Integration with Cisco Platforms | Supports Cisco IOS XE for voice functions |