Cisco PVDM4-256 - Plug-In Module - On-board motherboard or T1/E1 module slot - 256-channel high-density voice DSP module
Cisco PVDM4-256 - Plug-In Module - On-board motherboard or T1/E1 module slot - 256-channel high-density voice DSP module is backordered and will ship as soon as it is back in stock.
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Product Overview
The Cisco PVDM4-256 is a high-density voice and video DSP (Digital Signal Processor) module for Cisco ISR 4000 series routers, providing 256 DSP channels for voice transcoding, conferencing, and media processing in enterprise unified communications deployments. It is installed in a PVDM slot on supported ISR 4000 series routers and scales the router's voice processing capacity for large enterprise call manager and UC deployments.

Key Features
- 256 DSP Channels: High-density voice and video processing capacity for large enterprise deployments.
- ISR 4000 Series Compatible: Installs in the PVDM4 slot on Cisco ISR 4331, 4351, 4431, 4451, and other ISR 4000 series routers.
- Voice Transcoding and Conferencing: Provides hardware-accelerated media processing for CUCM and Cisco UC deployments.
- Scales Router Voice Capacity: Adds DSP capacity without requiring a separate media processing appliance.
Typical Applications
- Enterprise ISR 4000 routers handling high-volume voice call processing
- Cisco CUCM deployments requiring hardware transcoding
- Large enterprise UC deployments with conferencing and media resource requirements
- Branch office routers with voice gateway functions
Technical Specifications
| Specification | Detail |
|---|---|
| Model / SKU | PVDM4-256 |
| DSP Channels | 256 |
| Compatible Platform | Cisco ISR 4000 series (PVDM4 slot) |
| Function | Voice transcoding, conferencing, media processing |
| Form Factor | PVDM module (internal router slot) |
Frequently Asked Questions
- What ISR 4000 models support the PVDM4-256?
- The PVDM4-256 is compatible with Cisco ISR 4331, 4351, 4431, and 4451 routers with available PVDM4 slots. Confirm slot availability and maximum PVDM capacity with your router's hardware guide before ordering.
- Is SmartNet available?
- Yes. Cisco SMARTnet coverage is available through Creation Networks.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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