EXHIBIT 11 ACTIVE VOICE CORPORATION COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS, EXCEPT SHARES AND PER SHARE AMOUNTS) Three months ended Nine months ended December 31, December 31, ------------------------- ------------------------- 1997 1996 1997 1996 ---------- ---------- ---------- ---------- BASIC Average shares outstanding 4,633,753 4,583,352 4,621,668 4,573,841 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- Net income $618 $1,160 $1,484 $2,843 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- Per share amount $0.13 $0.25 $0.32 $0.62 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- DILUTED Average shares outstanding 4,633,753 4,583,352 4,621,668 4,573,841 Net effect of dilutive stock options 66,121 59,300 51,648 56,399 --------- ---------- ---------- ---------- Total 4,699,874 4,642,652 4,673,316 4,630,240 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- Net income $618 $1,160 $1,484 $2,843 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- Per share amount $0.13 $0.25 $0.32 $0.61 --------- ---------- ---------- ---------- --------- ---------- ---------- ---------- 17