Universal Mainboards

The new Kaypro 4 will actually have some features that the 10 won't have (at least for a while). It will have a new CTC timer and a modem built in. However, they aren't quite ready to ship the new 4. They are still cleaning up the software and the FCC has not yet certified that they pass the radiation restrictions.
(Micro Cornucopia, Feb 1984)

A useful article to understand the internal modem on the Universal Boards is found on page 76 of Micro Cornucopia, Jan-Feb 1988.

For adding the Real Time Clock reference the article on page 72 of Micro Cornucopia, May-June 1988.