INTER-TEL INC<INTLA.O> 2ND QTR MAY 31 OPER NET Oper shr three cts vs one ct Oper net 210,000 vs 67,000 Revs 10,252,000 vs 8,929,000 Avg shrs 7,933,000 vs 8,553,000 Six mths Oper shr five cts vs two cts Oper net 420,000 vs 133,000 Revs 20.3 mln vs 17.1 mln Avg shrs 7,952,000 vs 8,551,000 NOTE: 1987 earnings exclude gain from utilization of tax loss carryforwards of 125,000 dlrs, or one ct a share in the quarter and 150,000 dlrs, or two cts a share for the six months