It's SP1 that you have a limited time to answer.
SP2 has not changed, so you can answer anytime.
Once the Ring Pattern ends you cannot answer the call.
All the default Ring Patterns run for 60 seconds.
The SP1 Ring Pattern I suggested will only run for 17 seconds.
A better Ring Pattern for SP1 is 60;(2+4,2+4,2+46)
This Ring Pattern will run for 60 seconds, but only ring 3 times.
The last 46 seconds will be silence.
You will be able to answer the call until GV VM picks up the call.