Optimal layout of trunks inside the 2400

[phadobas]

I have several routes defined, and one of them is composed of 3 T1-s (giving me 72 outgoing lines). This is in a 2-stack 2400ICS. I don't remember where I heard this, but apparently, it's optimal for the system to have trunk 1 of the route the closest to the CPU, trunk 2 is next, and the increasing numbered trunks are further away from the CPU.
In other words, I shouldn't have trunk 1-24 in stack 2, and trunk 25-48 in stack one, and then trunk 49-72 somewhere else in a sporadic spot.
So I re-arranged my 72 trunks yesterday according to this theory: 1-24 are closest to the CPU: in stack 1, PIM 2. Then 25-48 are right next to it, to the right. Then 49-72 in stack 2 (the only place where there was a slot available).
But now what I'm seeing is that the most used T1 by the system is the last one: 49-72.
Has anybody ever heard of "optimal layout of the trunks" or I'm just dreaming this all up?
If there is an optimal layout, what would that be?

 

[belevedere]

The trunk selections are performed via CMD AOPR. You can place them anywhere in the system. The AOPR command determines which routes are selected first, second, third, etc. It also allows for adding and deleting digits.

 

[phadobas]

I know that, but these 72 trunks are all within the same route. My question mainly refers to "which trunk gets selected within a route?" So when AOPR tells the system to chose this route for a particular call, which of the 72 trunks gets selected? The one closer to the CPU, or the one with lower number, or just random.
Whenever I check, my system puts the most traffic onto the last T1, trunks 49-72, which are also the furthest away from the CPU.

 

[3racefan3]

In ARTD - CDN 49 is either a 0 or a 1 for which trunk become idle first or last, that is the only setting for which trunk is selected for outbound service, telco determines inbound obviously. I have never heard of the system caring about the trunks being located close to the CPU for T-1's. When installing PRI's with NFAS they should be in order but thats about it.