Cisco PVDM4-128 DSP Module for Voice and Video Processing

Equipment Overview

The Cisco PVDM4-128 is a 128-channel digital signal processor (DSP) module designed for voice and fax processing in enterprise network infrastructure. It is a packet voice/fax DSP module that enables high-density voice termination and conference bridging within supported Cisco integrated services routers. The module is positioned within the local area network (LAN) equipment category, serving as a dedicated hardware resource for voice codec conversion and packetization. Its primary purpose is to offload voice processing tasks from the router CPU, ensuring stable performance in multi-channel telephony environments.

Main Parameters

• Model: Cisco PVDM4-128
• MPN: PVDM4-128
• Brand: Cisco
• Channel capacity: 128 channels
• Module type: Packet voice/fax DSP module
• Product series: Cisco PVDM series
• Category: Local area network (LAN) equipment

Key Advantages

The PVDM4-128 delivers a high channel density of 128 DSP channels, making it suitable for large-scale voice deployments without additional chassis expansion. As a Cisco PVDM series module, it ensures consistent hardware integration and predictable resource allocation for voice and fax services. This model is selected for enterprise projects requiring scalable voice processing capacity within a single router platform.

Compatibility & Integration

The module is designed for installation into a PVDM slot on compatible Cisco integrated services routers. It operates as a standard PVDM-series component, supporting voice and fax packet processing across the router’s telephony interfaces. The product adheres to Cisco’s proprietary DSP architecture, ensuring seamless interoperability with other Cisco voice gateway hardware and software.