 RALEIGH-DURHAM, N.C.--BUSINESS WIRE--Telecom Consulting Group TCG, a leading National Master Agency, and Avaya NYSE: AVYA, a global leader in solutions to enhance and simplify communications and collaboration, today announced that TCG will be a new Master Agent in the U.S. market, offering Avaya Cloud OfficeTM by RingCentral, an all-in-one cloud solution providing unified communications across voice, video, team messaging, file sharing and fax. Communication delivered via a single platfor 