ORANGE COUNTY EARNINGS

PairGain Technologies Inc.: The Tustin-based company, which designs and manufactures communications systems, posted slightly higher net income for the second quarter as revenue rose 11%.

Net income totaled $11.8 million, or 16 cents a share, compared with net income of $11.7 million, or 16 cents a share, a year ago. Revenue rose 11% to $73.4 million from $66.4 million.

For the first half, PairGain said it earned $23.9 million, or 32 cents a share, up 3% from $23.1 million, or 31 cents a share, for the first six months of 1997, which included merger expenses of $2.6 million. Revenue advanced 6% to $146 million from $137.1 million.