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ALSO CALLED: Voice over Internet Protocol, IP Voice, Cable VOIP, VoIP Services, Voice over IP, Voice-over-Broadband, VoB, Voice-over-IP
DEFINITION: A comfort noise generator (CNG) is a program used to generate background noise for voice communications during periods of silence that occur during the course of conversation. CNG is part of the silence suppression or voice activity detection (VAD) handling for VoIP (Voice over IP) technology. The purpose of VAD and CNG is to maintain an acceptable perceived quality of service (QoS) while simultaneously  … 
Definition continues below.
VoIP IT Downloads (View All Report Types)
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ManageEngine OpManager 8.5
sponsored by ManageEngine
TRIAL SOFTWARE: OpManager helps IT admins quickly identify & resolve network performance problems using built-in troubleshooting tools and provides a single console for monitoring servers (physical & virtual), applications, network devices, bandwidth, WAN links, VoIP etc.
Posted: 27 Jul 2010 | Premiered: 27 Jul 2010


IBM Lotus Complete Collaboration Express Starter Pack
sponsored by IBM
SOFTWARE DEMO: Check out this software demo to see how the IBM Lotus Complete Collaboration Express Starter Pack works in conjunction with Lotus Domino and other applications to provide excellent collaboration capabilities and numerous other benefits.
Posted: 13 Mar 2009 | Premiered: 13 Mar 2009


Endpoint Security and Control
sponsored by Sophos, Inc.
TRIAL SOFTWARE: Learn how Sophos delivers complete protection against viruses, spyware and adware, controls VoIP, IM, P2P, games and removable storage devices and enables you to assess and control all endpoints.
Posted: 03 Oct 2008 | Premiered: 02 Oct 2008

Sophos, Inc.
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VOIP DEFINITION (continued): …  keeping transmission costs and bandwidth usage as low as possible. CNG, in conjunction with VAD algorithms, quickly determines when periods of silence occur and inserts artificial noise until voice activity resumes. The insertion of artificial noise gives the illusion of a constant transmission stream, so that background sound is consistent throughout the call and the listener does not think the line has gone dead. Most conversations include about 50% silence. VAD software allows a data network carrying voice traffic over the Internet to detect the absence of audio and conserve bandwidth by … 
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