So I have to contact the phone company ? to make them roll over the last number to the first number?

for example:

line one is 222-1111
line two is 222-2222
line three is 222-3333
line four is 222-4444
line five is 222-5555


Currently it goes down the line. So I have to instruct them that if line 222-5555 is busy, it goes back to line one 222-1111 which is the main line?