Cisco Cisco NM-1V One Voice Fax Interface Card Slot Network Module Fehlerbehebungsanleitung
Cisco - DSP on NM-HDV2 Functionality Verification for 2600XM/2691/2800/3700/3800 Platforms
http://kbase/paws/servlet/ViewFile/63461/hdv2-dsp-trbl.xml?convertPaths=1[11/9/2009 12:57:28 PM]
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DSP on NM-HDV2 Functionality Verification for
2600XM/2691/2800/3700/3800 Platforms
Contents
Introduction
This document discusses techniques used to verify the basic functionality of the digital signal processors (DSPs) on the NM-HDV2 IP
Communications High-Density Digital Voice or Fax Network Modules for the Cisco 2600XM/2691/2800/3700/3800 router platforms. The
DSPs are necessary for packet Telephony technologies such as Voice over IP (VoIP), Voice over Frame-Relay (VoFR), and Voice over
ATM (VoATM). The DSPs are responsible for the conversion of voice from analog to digital forms and the other way around, to set the
signal gain and attenuation parameters, for the operation of Voice Activity Detection (VAD), and more. Proper hardware and software
operation of the DSPs is necessary to ensure that calls are established and maintained correctly.
Communications High-Density Digital Voice or Fax Network Modules for the Cisco 2600XM/2691/2800/3700/3800 router platforms. The
DSPs are necessary for packet Telephony technologies such as Voice over IP (VoIP), Voice over Frame-Relay (VoFR), and Voice over
ATM (VoATM). The DSPs are responsible for the conversion of voice from analog to digital forms and the other way around, to set the
signal gain and attenuation parameters, for the operation of Voice Activity Detection (VAD), and more. Proper hardware and software
operation of the DSPs is necessary to ensure that calls are established and maintained correctly.
Refer to the
for more information on the NM-HDV2 IP Communications High-Density Digital Voice or FAX Network
Modules.
Prerequisites
Requirements
There are no specific requirements for this document
Components Used
The information in this document is based on these software and hardware versions:
An NM-HDV2 IP Communications High-Density Digital Voice or FAX Network Module installed in a suitable Cisco 2600XM/2691/2800/3700/3800 Voice Gateway
that runs an appropriate Cisco IOS
®
Software Release to support the Network Module.
The current document is tested on Cisco IOS® Software Release 12.3(11)T. Refer to
for more information on Cisco IOS support for the NM-HDV2.
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.
configuration. If your network is live, make sure that you understand the potential impact of any command.
Conventions
Refer to the
for more information on document conventions.
Problem Description
These symptoms can be attributed to DSP hardware or software issues:
No audio is heard by either party, or there is only one-way audio on the voice path after the call is connected.
Call setup failure such as the inability to detect or transmit proper Channel Associated Signaling (CAS) state transitions.
Voice ports are stuck in the PARK state and cannot be used.
Error messages, on the console or in the router log, which complain of DSP timeouts.
Send