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Finding a VoIP Analysis Product for Carrier Markets: Study

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TMCnews Featured Article


August 11, 2011

Finding a VoIP Analysis Product for Carrier Markets: Study

By David Sims, TMCnet Contributing Editor


A good recent white paper provided by application performance monitoring leader Datacom Systems (News - Alert), “VoIP Analysis Solution for Carrier Markets,” says that application analysis for Voice over IP (VoIP) is “time sensitive and dramatically impacts customer satisfaction,” and that while many carriers are developing new ways to monitor and analyze VOIP traffic, too many are still avoiding doing so.


Basically speaking, a Cable Modem Termination System lets cable modems send and receive packets over the Internet. It can provide filtering to protect against theft of service and denial of service attacks, the paper’s authors say, adding that it can also provide traffic shaping “in order to guarantee a specified quality of service (QoS) to selected customers.”

The paper touts the advantages of the VoIP Analyzer, describing it as “a carrier-grade, scalable, multiservice probe,” which finds what’s causing problems by using traffic monitoring to detect patterns of QoS degradation.

In a typical hub deployment, as the paper says, there will be something like two or more CMTS systems connected to a router. You need VoIP analysis at the hub level is required to maintain QoS and troubleshoot problems. In this case, then, taps provide a secure point of analysis between the CMTS and the router, as analysis with information from a tap does not require the use of a router port or any router configuration.

In one example, the paper describes, completely passive fiber optic taps are used for hub locations with four or fewer CMTS systems: “These are non-powered fiber optic taps that send a copy of the network traffic to a VERSAstream aggregation device.”

Under such a system, the fiber optic taps do not generate any delay and little signal loss on the connection, as “the aggregator combines all of the data together to send to a single interface on the VOIP Analyzer.”

Bear in mind that design considerations are determined by the analysis technique and network layout, as the paper’s authors say, and that modular components can be used to allow a “cookie cutter” approach to hub locations, but allow hubs to become upgraded in the future if port density becomes an issue.

Want to learn more about the latest in communications and technology? Then be sure to attend ITEXPO West 2011, taking place Sept. 13-15, 2011, in Austin, Texas. ITEXPO (News - Alert) offers an educational program to help corporate decision makers select the right IP-based voice, video, fax and unified communications solutions to improve their operations. It's also where service providers learn how to profitably roll out the services their subscribers are clamoring for – and where resellers can learn about new growth opportunities. To register, click here.


David Sims is a contributing editor for TMCnet. To read more of David’s articles, please visit his columnist page. He also blogs for TMCnet here.

Edited by Tammy Wolf







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