The following table sets forth for the periods indicated, the percentage of
the Company's total revenues derived from its significant customers listed below:

                                                        Year ended December 31,
                                                        -----------------------
                       Customer                          1998    1997    1996
                       --------                         ------- ------- -------

Columbia Technologies (1)..............................   15%      *       *
Insight Electronics, Inc. (1)..........................   20%     41%     16%
Tellabs Operations, Inc. (2)...........................   21%     16%     14%
ECI Telecom, Ltd.......................................    *       *      22%

*  Below 10% of the Company's total revenues.

(1) Columbia Technologies and Insight Electronics are distributors of our
    products to various end-users, none of which comprised more than 10% of
    the Company's total revenues during the periods mentioned.

(2) The Company's sales to Tellabs during 1996 and 1997 were made through
    Reptron Electronics, Inc., Tellabs' designated distributor. During 1998,
    sales to Tellabs were made through Reptron and Arrow Electronics Inc.,
    also Tellabs' designated distributor. Sales to Tellabs through Arrow
    during 1998 represented 17% of the Company's total revenues.

sec.gov;