This depends on which product you are configuring.
More complex products require more complex information.
Framing format and line code your carrier uses on the T1 line. Line build out required by your carrier's equipment. Framing and line code used on your T1 Customer Premises Equipment. Find out if your carrier supplies timing to the T1 line or if you need to supply timing. Determine how you will use the time slots within the T1 frame.