NIM-PVDM-128 – 128-Channel Voice DSP – NIM Slot – IP Media Services

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NIM-PVDM-128 Description

The NIM-PVDM-128 is a Cisco NIM-PVDM network interface module that adds DSP resources to Catalyst 8300 and ISR 4461 routers for IP voice and media services. The module provides 128 low-complexity, 96 medium-complexity and 64 high-complexity DSP channels, occupies one Network Interface Module slot and draws 15W. The module serves IP-based voice only and cannot run TDM applications.

Quick Specs

Parameter

Specification

Product ID

NIM-PVDM-128

Product type

NIM-based voice DSP module

Cisco ordering description

NIM PVDM with 128-channel DSP

Slot type

Network Interface Module slot

Low-complexity channels

128

Medium-complexity channels

96

High-complexity channels

64

Service scope

IP-based voice services

TDM application support

Not supported for NIM-PVDM-X modules

Catalyst 8300 software listing

IOS XE 17.3.2 / XE SD-WAN 17.3.2 / vManage 20.3.2

Catalyst 8200 software listing

IOS XE 17.4.1 or 17.5.1 baseline by model

Module power

15W

Application Scenarios

Branch IP Media Processing

A Catalyst 8300 at a branch office uses the module as a DSP farm for conferencing and transcoding, so voice endpoints on different codecs can join the same call.

IP Voice Gateway Capacity On ISR 4461

An ISR 4461 that terminates SIP trunks gains dedicated DSP channels in a free NIM slot, which takes media processing off the router CPU.

Product Comparison

Parameter

NIM-PVDM-128

NIM-PVDM-64

NIM-PVDM-256

Low-complexity channels

128

64

256

Medium-complexity channels

96

48

192

High-complexity channels

64

32

128

Slot type

Network Interface Module slot

Network Interface Module slot

Network Interface Module slot

Supported platforms

Catalyst 8300 and ISR 4461

Catalyst 8300 and ISR 4461

Catalyst 8300 and ISR 4461

TDM application support

Not supported

Not supported

Not supported

NIM-PVDM-128 sits between NIM-PVDM-64 and NIM-PVDM-256 in the NIM-PVDM family: NIM-PVDM-128 lists twice the channels of NIM-PVDM-64 and half those of NIM-PVDM-256, all three using the same Network Interface Module slot. A site whose call mix exceeds the 128-channel pool moves to NIM-PVDM-256, and a small branch that needs only half the capacity can drop to NIM-PVDM-64. All three modules serve IP-based voice services only, so a design that needs TDM voice cannot use this family and has to use a PVDM4 module on a T1/E1 NIM instead. Cisco lists the NIM-PVDM modules for Catalyst 8300 and ISR 4461 NIM-slot platforms.

Ordering Checklist

  • Catalyst 8300 and ISR 4461 hosts: Order for a Catalyst 8300 or Cisco ISR 4461 router with a free NIM slot. The NIM-PVDM modules are listed for these platforms, and 2900 and 3900 ISRs do not support them.

Specifications

Parameter Specification Parameter Specification
Product ID NIM-PVDM-128 Product type NIM-based voice DSP module
Cisco ordering description NIM PVDM with 128-channel DSP Slot type Network Interface Module slot
Low-complexity channels 128 Medium-complexity channels 96
High-complexity channels 64 Service scope IP-based voice services
TDM application support Not supported for NIM-PVDM-X modules Catalyst 8300 software listing IOS XE 17.3.2 / XE SD-WAN 17.3.2 / vManage 20.3.2
C8200 software listing IOS XE 17.4.1 / XE SD-WAN 17.4.1 / vManage 20.4.1 C8200L software listing IOS XE 17.5.1 / XE SD-WAN 17.5.1 / vManage 20.5.1
DSP technology Multicore DSP technology Interface Network Interface Module (NIM-PVDM-X)
Operating temperature 0°C to 50°C (32°F to 122°F) Voltage 12V
Input current 1.25A Power 15W
Weight 0.45 lb (204 g) Dimensions 1.25 x 3.50 x 7.24 in. (3.18 x 8.89 x 18.39 cm)

Quality Certifications

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    Posted on 20/12/2025
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    The after-purchase experience solidified our decision to make Layer23 a primary vendor.

Questions & Answers

  • Which routers take NIM-PVDM-128?

    NIM-PVDM-128 installs in a free NIM slot of a Catalyst 8300 or a Cisco ISR 4461. The 2900 and 3900 ISRs do not support the NIM-PVDM modules, and the module draws 15W from the slot and carries IP-based voice.
  • What is the minimum software for NIM-PVDM-128 on a Catalyst 8300?

    NIM-PVDM-128 is listed for the Catalyst 8300 from IOS XE 17.3.2, with XE SD-WAN 17.3.2 and vManage 20.3.2. An SD-WAN branch needs the matching vManage release in addition to the router release, and the module uses 15W at 12V.
  • What input voltage and current does NIM-PVDM-128 draw?

    NIM-PVDM-128 draws 1.25A at 12V, which matches the 15W module power. The 12V rail comes from the NIM slot of the Catalyst 8300 or ISR 4461. Count 15W against the slot power available in the router when other powered NIMs share the chassis.
  • What operating temperature range does NIM-PVDM-128 support, and what does it weigh?

    NIM-PVDM-128 operates from 0 to 50 degrees C (32 to 122 degrees F) and weighs 0.45 lb (204 g). Branch closets with weak cooling need to stay below the 50 degrees C limit, because the multicore DSP module adds heat inside the router while it processes conferencing and transcoding calls.
  • What are the dimensions of NIM-PVDM-128?

    NIM-PVDM-128 measures 1.25 x 3.50 x 7.24 in. (3.18 x 8.89 x 18.39 cm). It uses the multicore DSP design in a single NIM form factor, so it fits one NIM slot of the router and needs no extra rack space or external cabling.
  • Which IOS XE release does NIM-PVDM-128 need on a Catalyst 8200L?

    NIM-PVDM-128 is listed for the Catalyst 8200L from IOS XE 17.5.1, with XE SD-WAN 17.5.1 and vManage 20.5.1. The Catalyst 8200 itself lists IOS XE 17.4.1 with vManage 20.4.1. Check the router release and the matching vManage release before you order the module for an SD-WAN branch.

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DataSheet Downloads

  • NIM-PVDM-128 Datasheet