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Cisco 256-Channel High-Density Voice DSP Module or Spare PVDM4256

Cisco 256-Channel High-Density Voice DSP Module or Spare PVDM4256
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General Information
The PVDM4 modules are supported on the Cisco 4451-X platform. You can plug them directly into the single slot on the router motherboard or onto the network interface module (NIM) that supports T1/E1 ports. Enhanced DSP architecture accommodates a new packet-processing engine optimized for rich-media voice applications, while concurrently supporting the time-division multiplexing IP (TDM-IP) voice framework.

A PVDM4 module plugged onto the motherboard delivers IP-based voice services such as conferencing, media optimization, and transcoding. A PVDM4 module plugged onto the NIM daughter card would be used for voice T1/E1 connectivity.

All the PVDM4 modules have the same form factor and are field-upgradable to allow you to easily scale your voice deployments.

Technical Information
Application/Usage:Voice

Physical Characteristics
Height:0.7"
Width:2.5"
Depth:2.6"
Weight (Approximate):0.08 lb

Miscellaneous
Compatibility:Cisco 4400 Series Integrated Services Routers

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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Shipping Restrictions
  • This item cannot be shipped to PO Boxes.
  • This item can be shipped only within the U.S.


  • UPC: 882658562372 
  • Mfr's Part #: PVDM4-256=