It'll be Chapter 11 and will be business as usual for most employees until it can come out of it.
For those of you who think bankruptcy in the corporate world means doors closed and no more company you are sadly mistaken. Chapter 7 may occur in the future but it will be the far flung future after Chapter 11 restructuring and protections etc.
Avaya was Chapter 11 bankrupt and is about to come out by end of year projected so that does not mean end of world.