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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Configuring Next-Generation High-Density
PVDM3 Modules
The next-generation packet voice/data module (PVDM3) digital signal processor (DSP) modules
provide up to four times the density (per slot) of existing audio applications on Cisco voice gateway
routers. One universal DSP image for these DSP modules provides resources for time-division
multiplexing-to-Internet Protocol (TDM-to-IP) gateway functionality for digital and analog interfaces,
audio transcoding, and audio conferencing.
This enhanced DSP architecture accommodates a new packet-processing engine for rich-media voice
applications and supports the TDM voice framework used by the PVDM2 module. The PVDM3 has a
Gigabit Ethernet interface with a MultiGigabit Fabric to increase IP throughput, and a DSP
hardware-based health monitor provides DSP failure detection that is ten times faster than existing
technology.
The DSP Resource Manager has been enhanced so that PVDM3 modules can pool DSP resources and
share DSP resources across voice service modules when there is a combination of PVDM2-based
(using 5510 DSP) modules and PVDM3-based modules in one router. This supports the coexistence of
PVDM2, PVDM2-DM, and PVDM3 modules on separate boards in the same router. However, any
PVDM2 modules inadvertently deployed on the same voice card as PVDM3 modules are shut down.
Note Different-generation PVDM types can exist on different voice cards within the same router, but not on
the same voice card. Each voice card in a router can support only PVDM2 or PVDM3 modules. There
cannot be a combination of the two different PVDM types on the same voice card. There can be only one
type of PVDM on the router motherboard—either PVDM2 or PVDM3 modules—not a combination of
the two.
PVDM2s can reside on a network module within a router that supports PVDM3 modules on the
motherboard, but PVDM2 and PVDM3 modules cannot be mixed on the network module, and PVDM2s
and PVDM3s may not be mixed on the router motherboard.
Contents
• Prerequisites for Configuring the PVDM3 Module on Cisco Voice Gateway Routers, page 186
• Restrictions for Configuring the PVDM3 Module on Cisco Voice Gateway Routers, page 186
• Information About Configuring the PVDM3 Module on Cisco Voice Gateway Routers, page 187
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