RingCentral, Inc. (U.S.), ALE International (France), Sify Technologies, Ltd (India), Tata Communications, Ltd. (India), Verizon Communication, Inc (U.S.), Metaswitch Networks Ltd (U.K.), Mitel Networks Corporation (Canada), 8×8, Inc. (U.S.), Zoom Video Communications, Inc. (U.S.), Vonage Holdings Corp. (U.S.)
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