DOCS: SWITCH description added, revision 31 released.
DOCS: SWITCH description added, revision 31 released.

red-eco/red,rheber/red,NikolayShubenkovProgSchool/red,iArnold/red,vehar/red,vehar/red,red-eco/red,iArnold/red,NikolayShubenkovProgSchool/red,rheber/red