Resource Allocation on the NM-HDV2, NM-HD-xx, and PVDM2 (C5510-Based
Hardware)
Hardware assets based on the C5510 chipset are allocated application DSP profiles that
define the ability blazon aural the profile. Multiple profiles can be authentic on a single
gateway. These profiles can again be registered to altered Cisco Unified
Communications Manager clusters.
A PVDM2 is a bore that can backpack up to four C5510 DSPs. Table 2-9 lists the DSP per
PVDM2 allocation.
Table 2-9 DSPs per PVDM2
PVDM2 Number of C5510 DSPs
PVDM2-8 1/2
PVDM2-16 1
PVDM2-32 2
PVDM2-48 3
PVDM2-64 4
98 Authorized Self-Study Guide: Cisco Voice over IP (CVOICE)
Note Both the PVDM2-8 and the PVDM2-16 accept a distinct DSP. The DSP on the
PVDM2-8 has one-half the accommodation of the DSP acclimated on added PVDM2 modules. A
PVDM2-8 can be acclimated for conferencing, but with lower achievement numbers than the
other DSPs.
Conferencing resources can either be G.711-only or mixed mode (that is, at least one
party with G.729). Mixed-mode conferences require more DSP resources because the
DSP will perform transcoding and mixing operations.
Chapter 2: Considering VoIP Design Elements 99
Note For PVDM and PVDM2-based conferencing, the maximum number of conference
participants is independent from the maximum number of conferences. This means that
whether a conference has three, five, or eight participants, it counts the same against the
number of simultaneous conferences supported on a DSP.
Table 2-10 shows the various DSP resources for conferencing and their performance.