Guest

Cisco 2800 Series Integrated Services Routers

High-Density Packet Voice Digital Signal Processor Module for Cisco Unified Communications Solutions

Let Us Help

  • Viewing Options

  • PDF (123.5 KB)
  • Feedback

Product Overview

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.

Figure 1. PVDM2 Top and Bottom Views

 

Top

Bottom

PVDM2-64

PVDM2-48

PVDM2-32

PVDM2-8 and PVDM2-16

Table 1. Channel Density of Each PVDM2 Module

Name

Description*

Maximum Number of Channels in G.711

Maximum Number of Channels in High-Complexity Codecs

Maximum Number of Channels in Medium-Complexity Codecs

PVDM2-8

8-channel packet fax and voice DSP module

8

4

4

PVDM2-16

16-channel packet fax and voice DSP module

16

6

8

PVDM2-32

32-channel packet fax and voice DSP module

32

12

16

PVDM2-48

48-channel packet fax and voice DSP module

48

18

24

PVDM2-64

64-channel packet fax and voice DSP module

64

24

32

* 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

Name

High-Complexity Codecs

Medium-Complexity Codecs

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

* PVDM2 can support a higher density of G.711 calls than that of other medium-complexity codecs. See Table 1.
PVDM2 connects to the host through 80-pin single inline memory module (SIMM) slots. The module is field insertable and removable. Figure 2 shows how PVDM2 is plugged into PVDM2 SIMM slots on the Cisco high-density digital voice network modules.

Figure 2. PVDM2 SIMM Slots on the Cisco High-Density Digital Voice Network Modules

Features and Benefits

Investment Protection and Field-Upgradable Capability

PVDM2 is used across a series of Cisco Integrated Services Routers and high-density voice network modules, allowing users to distribute or reuse DSP resources among the routers or network modules as needed. The field-upgradable capability enables users to easily scale their voice deployments.
In addition, each DSP on the PVDM2 provides four times the processing power and more memory than the existing PVDM. The high performance of PVDM2 supports future growth.

High Density and Flexibility

PVDM2 provides high call density per DSP and flexibility of channel allocation. The maximized support of uncompressed G.711 voice calls optimizes DSP utilization for the solutions, mainly based on G.711 codecs such as IP telephony, in a LAN where the bandwidth consumed by uncompressed calls is not a concern.

Conferencing and Transcoding Services

With PVDM2, Cisco Integrated Services Routers and voice network modules provide both digital and analog voice connections and conferencing and transcoding services. In conjunction with host software, PVDM2 supports universal transcoding when needed. Universal transcoding allows transcoding from any supported codec to any other supported codec. As a general rule, the number of sessions needed for a universal transcoding channel is the sum of the session requirements for two separate voice channels, one running each of the configured codecs. For example, a channel running universal transcoding from a G.729a codec to iLBC would need the session capacity for a voice channel running the G.729a codec and MIPS (million instructions per second) for a voice channel running the iLBC codec.

Improved Voice Quality

PVDM2 performs compression, voice activity detection, jitter management, and echo cancellation functions to improve voice quality. The echo cancellation offered in PVDM2 has a tail length of 64 milliseconds (ms) and complies with International Telecommunication Union (ITU)-T G.168.

Availability of Features

Table 3 summarizes the availability of features.

Table 3. Features Availability

Name

Platform Support

Availability

Release

PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64

NM-HDV2, NM-HDV2-1T1/E1, and NM-HDV2-2T1/E1

IP voice or IP plus above images

Cisco IOS® Software Release 12.3(7)T

PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64

Cisco 2801*, 2811, 2821, and 2851 Integrated Services Routers

IP voice and above images

Cisco IOS Software Release 12.3(8)T4

PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64

EVM-HD-8FXS/DID, EM-HDA-8FXS, and EM-4BRI-NT/TE

IP voice and above images

Cisco IOS Software Release 12.3(8)T4

PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64

Cisco 3825 and 3845 Integrated Services Routers

IP voice and above images

Cisco IOS Software Release 12.3(11)T

PVDM2-8, PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64

Cisco 2901, 2911, 2921, 2951, 3925, 3945 Integrated Service Routers **

Unified Communications License

Cisco IOS® Software Release 15.0(1)M

* The conferencing and transcoding feature on the Cisco 2801 will be available in a future Cisco IOS Software release.
** Onboard support for the PVDM2 modules in the 2911, 2921, 2951, 3925, and 3945 platforms will be via the PVDM adapter, PVDM2-ADPTR. Adapters are not required on the Cisco High-Density Digital Voice Network Modules.

Product Specifications

Table 4 presents product specifications.

Table 4. Product Specifications

Feature

Specifications

Components

DSP

• Texas Instruments TNETV2510GGW for PVDM2-16, PVDM2-32, PVDM2-48, and PVDM2-64
• Texas Instruments TNETV2505GGW for PVDM2-8

DSP CPU Clock

• 200 MHz for TNETV2510GGW
• 175MHz for TNETV2505GGW

DSP External Memory

128-megabit synchronous dynamic RAM for each DSP (for both TI 2510 and TI 2505)

Interface

80-pin SIMM interface

Features

Echo Cancellation

Software echo cancellation compliant with ITU-I G.168, with 64-ms tail coverage

Approvals and Compliance

Safety

• IEC 60950 (worldwide) and AS/NZS 3260 (Australia and New Zealand)
• CAN/CSA-C22.2 No. 60950 (Canada) and GB4943-95 (People's Republic of China)
• EN60950 (CENELEC; includes EU and EFTA)
• SS337 (Singapore; PSB approval), NOM-019-SCFI-1998 (Mexico), and UL 60950 3rd edition (United States)

Homologation

Platform dependent

Mean Time between Failure (MTBF)

System dependent

EMC

CISPR22, Class B

Emissions

EN55022, Class B

Emissions

CFR47, Part 15, Subpart B, Class B

Emissions

EN61000-3-2

Harmonics

EN61000-3-3

Flicker

CISPR24

Immunity

EN 55024

Immunity

EN50082-1

Immunity

EN61000-3-2

Harmonics

EN 61000-3-3

Flicker

EN 61000-4-2

Electrostatic discharge (ESD)

EN 61000-4-3

Radio frequency (RF) fields

EN 61000-4-4

EFT

EN 61000-4-5

Surge

EN 61000-4-6

Conducted RF

EN 6100-4-8

Power-frequency magnetic fields

EN 61000-4-11

Voltage dips, sags, and interruptions

Ordering Information

Table 5 presents ordering information.

Table 5. Ordering Information

Description

Part Number

8-Channel Packet Fax/Voice DSP Module, or spare

PVDM2-8 or PVDM2-8=

16-Channel Packet Fax/Voice DSP Module, or spare

PVDM2-16 or PVDM2-16=

32-Channel Packet Fax/Voice DSP Module, or spare

PVDM2-32 or PVDM2-32=

48-Channel Packet Fax/Voice DSP Module, or spare

PVDM2-48 or PVDM2-48=

64-Channel Packet Fax/Voice DSP Module, or spare

PVDM2-64 or PVDM2-64=

PVDM2 Adapter for PVDM Slot on Cisco 2900, 3900 Series ISR

PVDM2-ADPTR or PVDM2-ADPTR=

To place an order, go to the Cisco Ordering homepage: http://www.cisco.com/en/US/ordering/index.shtml.

Cisco and Partner Services for the Branch

Services from Cisco and our certified partners can help you transform the branch experience and accelerate business innovation and growth in the Borderless Network. We have the depth and breadth of expertise to create a clear, replicable, optimized branch footprint across technologies. Planning and design services align technology with business goals and can increase the accuracy, speed, and efficiency of deployment. Technical services help improve operational efficiency, save money, and mitigate risk. Optimization services are designed to continuously improve performance and help your team succeed with new technologies. For more information, visit http://www.cisco.com/go/services.