Select a Category: Windows 3.11 Macintosh Windows 95/98/2000/XP Macintosh OS X WCOIL Dialup Express DTA Firmware Upgrade Installing such third party software carries inherent risks. Please refer to your computer's manual or help pages to determine compatibility before installing. If you still have questions please call WCOIL Technical Support at 419-229-2645 or 1-888-229-2645.		To download the software you need, click on the name of the software below. If you have difficulties downloading or installing the software, contact WCOIL support at 419-229-2645 or 888-229-2645 or send email to support@wcoil.com. DTA Firmware Upgrade DTA Firmware Upgrade for Digital Phone Service