A survey of companies using telecommunications equipment investigated the distribution of channel selection and the use of external mail distribution systems. A total of 50 companies responded to the survey, which identified 12 telecommunications systems and seven external mail distribution systems. Results indicated that the four most popular telecommunication systems (listed in decreasing order) were data modems, key telephone systems, facsimile, and computer-to-computer data transmission. Results also indicated that facsimile, Federal Express, and telex were the most popular external mail distribution systems. (Two tables of data are included.) (RS)