Cisco PVDM2 32 Channel Packet Voice/Fax DSP Module. Used in Cisco 2800 and 3800 series routers.
The Cisco ® High-Density Packet Voice Digital Signal Processor (DSP) Module (PVDM2) enables Cisco Integrated Services Routers to provide high-density voice connectivity, conferencing, and transcoding capabilities in Cisco IP Communications solutions. Cisco Integrated Services Routers provide enterprises and service providers with a toll bypass solution by connecting their existing telephony equipment (such as private branch exchanges [PBXs], key systems, analog telephones, and fax machines) to a toll-free data network and eventually migrating customers to Cisco Unified Communication Architecture for Voice, Video and Integrated Data IP telephony solutions.
The high-density packet voice DSP modules are available in five versions: PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64 (Figure 1). Tables 1 and 2 show the number of voice channels and codecs that each PVDM2 module supports.
Table 1. Channel Density of Each PVDM2 Module
Maximum Number of Channels in G.711
Maximum Number of Channels in High-Complexity Codecs
Maximum Number of Channels in Medium-Complexity Codecs
8-channel packet fax and voice DSP module
16-channel packet fax and voice DSP module
32-channel packet fax and voice DSP module
48-channel packet fax and voice DSP module
64-channel packet fax and voice DSP module
* The number of channels in PVDM2 product numbers and descriptions is the maximum channel density with the G.711 codec.
Table 2. Codec Support on the PVDM2 Module
G.723.1, G.728, G.729, G.729b, iLBC, and Modem Relay
G.7112, g.729a, G.729ab, G.726, G.722, and Fax Relay
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