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Q. What is a PVDM? What function does it provide on the Cisco Integrated Service Routers?
A. A Packet Voice Digital Signal (PVDM) is a hardware module that provides digital-signal-processor (DSP) resources to the system. A PVDM module can be populated with one or more DSPs. The DSP resources on a PVDM module provide collaboration services including voice sessions, transcoding sessions, conference sessions, and video.
Q. How many types of PVDMs are available?
A. Two PVDM versions are currently supported, the PVDM2 series modules and the PVDM3 series modules. The Cisco 2800 and 3800 Series platforms support only the PVDM2 modules. The Cisco 2900 and 3900 Series platforms support both the PVDM2 and PVDM3 modules. The PVDM3 modules provide higher density (up to 4 times higher) than the PVDM2s. They also provide improved performance in terms of the number of conference and transcoding sessions supported.
Q. What are the different PVDM3 modules?
A. Table 1 lists the PVDM3 models.
Table 1. PVDM3 Models
SKU #: PVDM3-192