PVDM versus PVDM2
"The PVDM utilizes the C549 DSP and is available on the NM-HDV series of network modules. Only one model of PVDM exists, and is equipped with three C549 DPS's. The actual part number is the PVDM-12. The -12 indicates that the PVDM can terminate a maximum of 12 voice calls-four calls on each of the C549 DSP's.
The PVDM2 utilizes the C5510 DSP and is available in the NM-HDV2 series of network modules and the Intermediate Session Routing (ISR) family of routers. The newer DSP that is used in the PVDM2 allows for higher-density voice termination and increased transcoding and conferencing sessions. Five modles of the PVDM2 exist, each equipped with a different number of DSP's. As with the PVDM-12, the -xx in the PVDM2 part number indicates the maximum number of voice channels that the PVDM2 can terminate.
The C549 DSP's are dedicated to one tas, when you use PVDM's, the DSP's are statically assigned to voice termination when the router is started, or in the case of T1 and E1 ports, when the voice port is created. If additional DSP's are available, you can configure them to provide transcoding or conference bridges resources.
C5510 DSP allocation is more complex, for analog and BRI ports, C5510 DSP's are statically assigned to voice termination when the router is started. C5510 DSP's are dynamically assigned to provide voice port termination for T1 and E1 ports and for transcoding. A single C5510 DSP can provide both functions simultaneously. Conferencing is still statically defined and a C5510 DSP that is configured as a conferencing resource cannot serve any other function."
//Jorge
