The Sales and Marketing Education organization of AT&T Communications conducts ongoing research to monitor the impact of their National Teletraining Network (NTN) programs for professional sales personnel on: (1) learning, (2) student acceptance of courses and instructors, and (3) student willingness to take additional teletrained programs. During 1984, comparisons were made between face-to-face courses and a teletrained delivery mode; no significant differences were found at the .05 level of significance between the two methods in either the course relevance and design or the quality of instruction categories. A short questionnaire was used to evaluate the effectiveness of the teletraining programs; 91.6% of the students who responded indicated they would participate in future teletraining courses. Cost benefit analysis substantiates the fact that teletraining is a cost-effective alternative to face-to-face delivery of training. Additional benefits include: the ability of the medium to reach remote, low density areas; the ability to add multiple locations to a training session; the flexibility to increase the number of students who can be reached at one time; the ability to quickly disseminate information to an entire sales force; and the ability to share limited instructor resources. It is pointed out that without the NTN, much of the current update training would not be attempted due to various constraints, e.g., the high cost of travel and travel time. Two data tables and two graphs are provided. (JB)