Troubleshooting Voice over IP Networks

Troubleshooting Voice over IP Networks

Analyzing the Converged Enterprise

Voice over IP systems, plus multimedia applications incorporating fax and video, are positioned as the next generation of applications for IP-based enterprise networks. But before you start deploying applications such as voice and video traffic over your corporate intranet, or a voice-enabled web site, be certain that you are prepared to support these new applications. This one-day workshop provides the network manager and designer with a clear understanding of the protocols required to support a voice over IP network, the interactions between that converged network and legacy systems, plus techniques for analyzing and troubleshooting these systems.

We will examine converged networks from two perspectives: operations and analysis. We will first examine the operations of the protocols that supplement the functions of IP to facilitate real-time data transport, including the IETF’s RTP, RTCP, SDP, SAP, RTSP, RSVP, SIP and MGCP, plus the ITU-T’s H.225.0, H.245, H.248 and H.323. Second, we will consider the various design and implementation issues that effect the quality of voice transmission. Finally, we will analyze the operation of those protocols, to better understand their interaction, minimize implementation difficulties, and optimize the quality of the end-to-end voice transmission.

Tutorial Outline

During class, we will demonstrate the techniques of Voice over IP network protocol analysis using case studies that have been captured from live internetworks, and we will analyze these using a Network General Snifferâ protocol analyzer. Examples of these case studies are:

	Elements of the Voice over IP packet, including headers and voice samples
	Interactions between the ITU-T H.323 and the IETF Internet protocol suites
	Call establishment/disconnect procedures using Q.931 and H.225.0
	Terminal-to-terminal capabilities negotiation using H.245
	Real time information transport using RTP and RTCP
	Quality of Service Issues: encoding schemes, delays and transmission impairments

Who Should Attend

Engineers, software developers, network managers, telecom managers, ISPs and product developers that need an understanding of the operation of an IP-centric, integrated voice/data/video network infrastructure.

Course Materials

Each student will receive a copy of Voice over IP Technologies, by Mark A. Miller, P.E. and published by M&T Books, Inc., and also a CD with key IETF documents, Voice over IP client software, and the Westbay traffic analysis software.

5310 St. Vrain Road, Longmont, CO 80503

Tel: 303.682.5244 Fax: 303.682.2654 Email: mark@diginet.com

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