IP Cortex VoIP PABX User Manual page 16

You will then be prompted to accept the licence agreement and, when
accepted, asked to confirm the install location:
Once preparation is complete, the following message will be
displayed, prompting final confirmation of install:
Once installation is complete, you will be reminded that a reboot is
required to fully install the TAPI drivers:
Clicking OK does not cause a reboot which needs to be carried out
manually before the TAPI driver becomes available.
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