.th DA IV 10/28/73 .sh NAME da \*- voice response unit .sh DESCRIPTION Bytes written on this file control a Cognitronics optical drum voice response unit which can generate up to 31 fixed half-second utterances. Bytes read correspond to Touch-Tone\(rg signals received via a 403 dataset. .s3 The specifics of the interface will not be described. Consult M. E. Lesk for more information. .sh FILES /dev/da .sh BUGS