Avaya or Zang is not even listed as Niche player in cCaaS Gartner Magic Quadrant.
http://www.incontact.com/blog/nice-incontact-named-leader-gartners-ccaas-magic-quadrant/
Same is the case for uCaaS.
If cloud is the future business, Where is Avaya with uCaaS and cCaaS?