EXHIBIT 23.2(b) CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANT We hereby consent to the incorporation by reference in this Registration Statement on From S-3 of our report dated March 31, 1997, which appears on page 21 of the annual report on From 10-K of Viewtech Corporation and subsidiary for the year ended December 31, 1997, and to the reference to our Firm under the caption "Experts" in this Prospectus. /s/ CARPENTER, KUHEN & SPRAYBERRY - --------------------------------- CARPENTER, KUHEN & SPRAYBERRY Oxnard, California June 1, 1998