Cisco 256-Channel High-Density Voice DSP Module, or Spare - For Voice
These new modules support unprecedented scale while allowing for a smaller solution footprint than ever before. The echo cancellation offered in the PVDMs has a tail length of 128 milliseconds and complies with ITU-T G.168. ● Energy savings: The motherboard PVDMs (PVDM4s) offer multiple power-saving modes, including a power-saver mode when the module is not in use. In power-saver mode, each PVDM4 can save up to 5 watts of power. They can be plugged directly into the single slot on the router motherboard or into the Network Interface Module (NIM) that supports T1/E1 ports.
Datasheet: View the manufacturer datasheet
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