Cisco SM-X-PVDM-500 – Voice DSP module – enhanced service module (SM-X) – for Cisco 4451-X; Integrated Services Router 4351, 4431
The PVDM enhanced services modules are supported on ISRs that contain an SM-X slot – namely the Cisco 4331, 4351, and 4451 ISRs. The SM-X modules support only IP-based voice services and cannot be used for TDM applications.
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