Appendix A: Keys to a Successful Mission-Critical VoIP Installation
Appendix A: Keys to a Successful
Mission-Critical VoIP Installation
Overview
There are two essential things needed for a successful Zetron Voice-over-IP (VoIP)
installation (VoIP applications include Radio-over-IP or RoIP); these are the right
knowledge, and the right IP network. And a third thing is helpful – a definition of
success.
Let’s start with the definition of “success”. If the VoIP system is to carry mission-critical
voice, then success means no or very, very little disruption of voice and radio
transmissions. For example, although the human mind can make up by context for
the loss of an occasional syllable, it can’t easily distinguish between “shoot” and
“don’t shoot” if the word “don’t” is missing. But if the VoIP system is to carry non-
critical voice, then some slight or moderate disruption of voice and radio transmissions
may be acceptable.
The Right IP Network
Next, let’s consider the IP network. Unlike the old analog, copper wire days of point-to-
point circuit switched networks, an IP network is designed to carry data from a number of
different users, and a number of different applications. Of course it is possible to create a
single-purpose IP network dedicated to a task such as VoIP, but doing so may defeat one
of the prime advantages of an IP network. So let’s assume that you are going to put a
VoIP system on an existing IP network. That means that both voice (VoIP) packets and
other packets (presumably non-voice data) will be traveling the IP network at the same
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