NM-HDV思科原装线卡模块产品简介

This document addresses how to NM-HDV思科原装线卡模块troubleshoot the basic functionality of the digital signal processor (DSP) from a hardware and software perspective. This allows you to ensure that calls can be established correctly. The main issuesNM-HDV思科原装线卡模块 on the DSP are seen on the High Density Voice Network Module (NM-HDV). The DSP is the main piece in VoIP and is responsible for the transfer of analog to digital signals, as well as digital to analog signals. The DSP also sets the gain and attenuation parameters, voice activity detection (VAD), compression, and more.NM-HDV思科原装线卡模块

Prerequisites

Requirements  NM-HDV思科原装线卡模块

There are no specific requirements for this document.

Components Used NM-HDV思科原装线卡模块

This document is applicable for these hardware devices:

• Cisco 2600 Series Multiservice Routers

• Cisco 3600 Series Multiservice Routers except for Cisco 3631 platforms

• Cisco 3700 Series Multiservice Routers

• Cisco VG200 Series Gateway

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Problem NM-HDV思科原装线卡模块

These are some of the symptoms that can be attributed to DSP hardware or software issues:

• No audio heard, or dead air on the voice path after the call is connected

• Call setup failure

• Channels are stuck in the PARK state and cannot be used