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AACE Worldwide Pty Ltd, Acroamatics Telemetry Systems, Artesyn Communication, Artesyn Communication Products, Aurora Networks, AVP Mfg and Supply Inc., Bay Microsystems, Calient, Caspian Networks, Ciena Corporation
Aculab, ARCOMM Telecommunciations, Aries Telecom, Arion, Bayly Communications Inc., Bell Enterprise, Bhumika, Carolina Communications Service, Inc., Carrier Access Corporation, Central Office Systems
Develops, manufactures, markets and supports Class 5 Softswitch products for central office and regional switching center deployments.