Allow me to put on my CONSULTANT Hat...
What are the alternatives?
What you are asking is, CAN I JUSTIFY $41.66 Cost per trunk.
What do 1FB's or "Regular" trunks cost?
How much traffic do you have? (Calls per hour, etc.)
Also, how many extensions?
NOT TO MENTION, what "VALUE ADDED" will you be getting?
IF THEY HAVE SOLD YOU 2-WAY D-I-D, BE VERY CAREFUL !
This could end up being the programming nightmare from H E Double Hockey Stix !!!
And last, Can you get PRI for the SAME (or nearly the same) Price?
Ususally, PRI is the way to go over 2-WAY D-I-D.
Several things to consider.....