Packet Voice Digital Signal Processor Modules (PVDM) are essential
components in Cisco’s Voice over IP (VoIP) architecture. PVDM modules
provide digital signal processing (DSP) resources that are used to perform
voice encoding, decoding, and other signal processing functions in Cisco’s
routers and switches. PVDMs are designed to work with a range of Cisco
products, including Cisco 4000 Series Integrated Services Routers (ISR),
Cisco Integrated Services Routers Generation 2 (ISR G2), and Cisco Voice
Gateways.
PVDMs come in different versions, each with its own set of features and
specifications. The different versions of PVDMs are listed below:
PVDM2: The PVDM2 modules are the first generation of PVDMs and were
introduced in 2004. These modules support a range of voice codecs and offer
high-quality voice processing capabilities. PVDM2 modules are compatible
with Cisco ISR G2 and Cisco 2900 Series Integrated Services Routers.
PVDM3: The PVDM3 modules are the second generation of PVDMs and were
introduced in 2010. These modules offer higher processing power and support
more advanced codecs than the PVDM2 modules. PVDM3 modules are compatible
with Cisco ISR G2 and Cisco 3900 Series Integrated Services Routers.
PVDM4: The PVDM4 modules are the third generation of PVDMs and were
introduced in 2014. These modules offer even higher processing power and
support more advanced codecs than the PVDM3 modules. PVDM4 modules are
compatible with Cisco 4000 Series Integrated Services Routers.
PVDM4-32: The PVDM4-32 module is a specialized version of the PVDM4 that
provides 32-channel DSP resources. This module is designed for high-density
voice processing applications and is compatible with Cisco 4000 Series
Integrated Services Routers.
PVDM4-64: The PVDM4-64 module is another specialized version of the PVDM4
that provides 64-channel DSP resources. This module is designed for even
higher-density voice processing applications and is compatible with Cisco
4000 Series Integrated Services Routers.
PVDM4-256: The PVDM4-256 module is the highest-capacity PVDM module and
provides 256-channel DSP resources. This module is designed for large-scale
voice processing applications and is compatible with Cisco 4000 Series
Integrated Services Routers.
Also, Check: Top 50+ Cisco VoIP IPT and above Level Interview Questions and Answers
In conclusion, the different versions of PVDMs offer a range of processing
capabilities and features to support different voice processing
applications. The PVDM2, PVDM3, and PVDM4 modules are the most commonly used
PVDMs and offer increasing levels of processing power and support for more
advanced codecs. The specialized PVDM4-32, PVDM4-64, and PVDM4-256 modules
are designed for high-density and large-scale voice processing applications,
respectively. Cisco continues to innovate and develop new PVDM modules to
meet the evolving needs of its customers and the demands of the VoIP
industry.