True, but then again if it isn't activated ... the rest of the install may also have failed. But if it's active it's likely installed.
We have clients now who use external (asterisk 1.6/1.
Cepstral servers to "serve" TTS to vicidial servers. The new voices seem to have improved enough to convince clients to purchase licensing for the In Channel voices (and the licensing model is a bit different, too, which is nice).