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Introducing NIM-PVDM DSP Voice Module

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Lokesh Kumar Lal
Cisco Employee

NIM-PVDM is the Next-generation digital signal processor (DSP) module with an onboard DSP daughter card which eliminates the need to procure an additional T1/E1 NIM card in order to utilize a PVDM4 chip for IP media services. This module enables the new Catalyst 8300 cloud edge platforms and ISR 4461 to provide rich-media capabilities such as high-density voice connectivity, conferencing, transcoding, media optimization, transrating, and secure voice for Cisco Unified Communications solutions. TDM Voice Terminations are not supported by NIM-PVDM Modules.

 

The module support starts with IOS XE release 17.3 for both SD-WAN and non SD-WAN deployments.

Screenshot 2020-10-30 at 10.15.17 AM.png

It has feature parity with PVDM4 DSP modules and supports both autonomous (non SD-WAN) and controller mode ( SD-WAN).

 

Some of its key features include:

  • SCCP conferencing
  • SCCP transcoding
  • LTI transcoding
  • SCCP hardware media termination
  • Media optimization

Note: LTI transcoding is not supported in controller mode (SDWAN) or with vManage, at all.

 

Table 1 lists the various NIM-PVDM options along with their slot requirements.

 

Table 1.       NIM-PVDM Part Numbers and Slot Requirements

Part Number Slot Description

NIM-PVDM-32

Network Interface Module(NIM) Slot

32-channel density voice DSP module

NIM-PVDM-64

Network Interface Module(NIM) Slot

64-channel density voice DSP module

NIM-PVDM-128

Network Interface Module(NIM) Slot

128-channel density voice DSP module

NIM-PVDM-256

Network Interface Module(NIM) Slot

256-channel density voice DSP module

 

NIM-PVDM can also be used with an SM slot with an SM-X-NIM-ADPTR card for ISR 4461 and a C-SM-NIM-ADPT card for the Catalyst 8300 edge platforms.

 

Table 2.       NIM-PVDM Platform Availability

 

Platform NIM Slots SM Slots Max NIM-PVDM

ISR4461

3

3

6

C8300-1N1S-4T2X

1

1

3

C8300-1N1S-6T

1

1

3

C8300-2N2S-4T2X

2

2

6

C8300-2N2S-6T

2

2

6

 

Codec Support and Capacity

NIM-PVDM supports all the codec that are currently supported with PVDM4 and SM-X-PVDM modules for IP media services.

 

Table 3.       NIM-PVDM Codec Support

Codec  Complexity

G.711

Low

Fax and Modem pass through

Low

G.722

Medium

G.729a

Medium

G.729ab

Medium

G.729

High

G.729b

High

iLBC

High

iSAC

High

 

Table 4.       NIM-PVDM Channel Density

Module

Low Complexity

Channel Count

 Medium Complexity

 Channel Count

 High Complexity

 Channel Count

NIM-PVDM-32

32

24

16

NIM-PVDM-64

64

48

32

NIM-PVDM-128

128

96

64

NIM-PVDM-256

256

192

128

 

Module Detection and Configuration

You can use the show platform CLI command to verify the status and slot information of a new NIM-PVDM module as shown below.

Screenshot 2020-10-30 at 10.56.31 AM.png

 

Configuration in Autonomous Mode

The module supports DSP resource pool sharing with other PVDM modules and hence the DSPFARM configuration has not changed.

 

SCCP DSPFARM Configuration (CUCM Controlled)

Screenshot 2020-10-30 at 11.06.57 AM.png

LTI Transcoding Configuration (CUBE Controlled)

Screenshot 2020-10-30 at 11.08.40 AM.png

 

Configuration in Controller Mode

In SD-WAN mode , ths dspfarm configuration is provisioned and pushed via vManage controller.

 

1. Login to vManage and select the DSPFARM feature template for the applicable cEdge platform.

 

Screenshot 2020-10-30 at 11.17.34 AM.png

 

2. Provide a suitable name & description and select the module and slot to add the NIM-PVDM module.

Screenshot 2020-10-30 at 11.33.53 AM.png

 

3. Select the appropriate dspfarm profile configuration options such as profile type, max sessions, codec etc and add the profile

Screenshot 2020-10-30 at 11.36.06 AM.png

 

4. Add the SCCP server configuration with CUCM IP address and identifier ID.

 

Screenshot 2020-10-30 at 11.42.26 AM.png

 

5. Add the CUCM Group configuration and save the profile.

Screenshot 2020-10-30 at 11.43.59 AM.png

 Add the Feature template to the device template configuration under the unified communication section and push the changes to the cedge device.

Screenshot 2020-10-30 at 11.46.19 AM.png

 

 

 

 

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