 MILPITAS, CA ACCESSWIRE November 23, 2021 Altigen Communications, Inc. OTCQB:ATGN, a Silicon Valley-based Microsoft ISV and Cloud Solutions provider, will announce its fourth quarter and fiscal year 2021 financial results after the close of regular market trading on Tuesday, December 7, 2021. The Company will also hold a conference call to discuss the results at 2:00 p.m. 