Modem Installation Issues
When installing a voice modem, ensure that you follow all the steps provided in Install a Voice Modem.
For example, if you encounter the error:
Call failed to [UserName] on [PhoneNumber]: TAPI error [14] - The Telephon.ini file cannot be read or understood properly by TAPI because of internal inconsistencies or formatting problems
The cause is failure to complete step 4 of the modem installation process.