Suppose you’ve got an Eumex telephone system. You’ve got a few extensions, which are configured as phone extensions in the dial plan. You’ve got an extension that is configured as a fax/modem extension in the dial plan. Now you plug a fax modem into the fax extension of your Eumex. You haven’t used the fax modem since the nineties and you are not sure it does work at all. To test your setup, you dial the number of one of your phone extensions. Now the phone extension rings and you know that everything is ok. Merely a matter of very few minutes. Right? Wrong! Eumex tries to be smart. It “knows” that you try to call a phone number from a fax number. And that must be a mistake of the user. Eumex will not let you do this. While Eumex “thinks” that it is not a problem to call the number of your own extension, Eumex “thinks” it is a serious problem, if you want to call a phone extension from a fax extension. It won’t let you. It will always give you a busy signal.
In my mind’s eye I see the numbers of users, who, years after installation, decided to get rid of their fax machine and plug in a phone instead. How much time will be burned until they notice why they can’t call other in-house extensions?
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