PVDM4-128 Overview
The Cisco® Packet Voice Digital Signal Processor Modules (PVDMs) enable Cisco 4000 Series Integrated Services Routers (ISRs) to provide rich-media capabilities such as high-density voice connectivity, conferencing, transcoding, media optimization, transrating, and secure voice for Cisco Unified Communications solutions. These new modules support unprecedented scale while allowing for a smaller solution footprint than ever before.
Features and Benefits
The PVDMs support digital voice connections, conferencing, universal transcoding, and media optimization services:
● T1/E1 voice: One of the primary uses of PVDMs is to packetize digital voice into IP packets to enable time-division multiplexing (TDM) digital voice applications.
● Conferencing: PVDM modules support ad hoc and meet-me conferencing with various codecs in conjunction with Cisco Unified Communications Manager and Cisco Unified Communications Manager Express.
● Universal transcoding: In conjunction with Cisco IOS® Software, the PVDMs support universal transcoding, which allows conversion from any supported codec to any other supported codec.
● Transrating: The PVDMs support transrating, in which the same codec is repacketized in order to connect dissimilar networks that have different codec packetization periods.
● Voice-quality management: The PVDMs perform compression, voice-activity detection, jitter management, and echo cancellation. The echo cancellation offered in the PVDMs has a tail length of 128 milliseconds and complies with ITU-T G.168.
● Energy savings: The motherboard PVDMs (PVDM4s) offer multiple power-saving modes, including a power-saver mode when the module is not in use. In power-saver mode, each PVDM4 can save up to 5 watts of power.
The analog voice modules (FXS, FXO, and E/M) and Basic Rate Interface (BRI) digital voice modules for the 4000 Series ISRs contain built-in, nonconfigurable digital signal processors (DSPs) and do not require any additional PVDMs for voice packetization.
PVDM4-128 Specification
| PVDM4 Modules Specifications | |
Feature | Motherboard PVDMs (PVDM4s) |
Components | |
DSP | Multicore DSP technology |
Interface | Integrated Services Card (ISC) slot on motherboard or T1/E1 NIM |
Features | |
Operating temperature | 32° to 122°F (0° to 50°C) |
Voltage | 3.3V |
Current | 1.47A |
Power | 4.85W |
Weight | 0.08 lb (36 g) |
Dimensions (H x W x D) | 0.67 x 2.50 x 2.62 in. (1.7 x 5.1 x 6.7 cm) |
Regulatory and Compliance | |
Safety | Complies with: ● IEC 60950 (worldwide) ● AS/NZS 60950-1 (Australia and New Zealand) ● CAN/CSA-C22.2 No. 60950-1, 1st and 2nd Ed. (Canada) ● GB4943-95 (People's Republic of China) ● EN60950-1, 1st and 2nd Ed. (CENELEC; includes EU and EFTA) ● NOM-019-SCFI-1998 (Mexico) ● UL 60950-1, 1st and 2nd Ed. (United States) |
Homologation | Platform dependent |
Mean time between failures (MTBF) | System dependent |
EMC | |
Emissions | ● CISPR22, Class B ● EN55022, Class B, CFR47, Part 15, Subpart B, Class B |
Harmonics | EN61000-3-2 |
Flicker | EN61000-3-3 |
Immunity | ● CISPR24 ● EN 55024 ● EN50082-1 |
Electrostatic discharge (ESD) | EN 61000-4-2 |
RF fields | EN 61000-4-3 |
EFT | EN 61000-4-4 |
Surge | EN 61000-4-5 |
Conducted RF | EN 61000-4-6 |
Power-frequency magnetic fields | EN 6100-4-8 |
Voltage dips, sags, and interruptions | EN 61000-4-11 |