Voice services have, historically, had a high level of reliability. This has led many who are not familiar with the technology to assume that because voice services are reliable, they must therefore be simple. This leads to a further assumption: Because it's simple, anyone can do it.

Well, maybe not.

As consultants, we have been involved in the replacement of hundreds of systems over the years.

Here are the 10 most common mistakes we have seen when replacing a telephony system:

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