Only if you have several T1 ‘s and the T1 in question is the first one, the one always taking the first 24 (or 23) calls.
In real life, yu could reach 200k maybe 250.
The best situation is when you get customers that are divided over diferent ime zones, like calls to south america and calls to asia on the same gateway.
When all the americas are sleeping, calls to asia are on the busiest time.