Prime Telecommunications Inc., 5 Triad Center, a long-distance telephone company, reports net income of $93,000 or .02 cents per share on revenue of $13.4 million in 1990, compared to net income of $217,142 or .06 cents per share on $11.9 million in revenue.

While revenue showed a 12.5 percent gain over 1989, company officials attribute decreased net income to higher selling and general and administrative expenses, which included costs of an aggressive tele-marketing campaign aimed at reaching the residential segment of the market.Bradford J. Brower, chairman and chief executive officer, said the marketing effort in the third and fourth quarters of 1990 was intended to diversify the company's predominantly commercial customer base and effect greater usage of our existing network during non-business hours.