I have a 4" drain pipe that has all the drains going to it it is coug up and won't drain any thing there is a pvc pipein the cast iron pipe all the water is drining out in the basement how do I fix it

i have a 4" drain pipe that has all the drains going to it it is coug up and wont drain any thing there is a pvc pipein the cast iron pipe all the water is drining out in the basement how do i fix it
You snake the 4" pipe out and clear the clog. Good luck, Tom