June 2005
Intermediate to advanced
502 pages
21h 48m
English
Content preview from Switching to VoIP
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This is the Title of the Book, eMatter Edition
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246
Chapter 11
CHAPTER 11
Troubleshooting Tools
The word troubleshooting may trigger memories of desperation when a critical sys-
tem was down and you couldn’t figure out why. Troubleshooting often justifies high-
priced consultants. The mere mention of it can make fainthearted IT executives
squirm… because if you’re troubleshooting, that means something’s wrong. Regard-
less, troubleshooting tools are an important ingredient in the VoIP success recipe.
If you’re building your standards-based VoIP network from the ground up today,
then you’re probably using SIP and not H.323. SIP is clearly the prevailing standard
for VoIP call signaling, as it provides more interoperability and easier troubleshoot-
ing. The tools used to troubleshoot SIP and H.323 are largely the same, though:
packet sniffers, log analysis, and softphones.
Since SIP is a framework for real-time media applications, the stability of one SIP-
based system to the next can vary greatly. Problems are most likely at the applica-
tion layer. Troubleshooting them may require a specific knowledge of the applica-
tion, or even access to its source code. This isn’t always practical or available. Many
system engineers aren’t hard-core C programmers. Of course, for those who want to
probe the mechanics of IP telephony with C, a great ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.