Hello guys,
I finally found a command under the E1 line section: 

Maintenance-State
Description: Allows you to Busy Out or take Out Of Service (OOS) a T1 PRI
line. Active calls on the line are not torn down.

Example: set maintenance-state=yes

This example was taken from the Max TNT administration Guide for version
7.0.0.

I'm running 7.0.22 and 7.2.4 and i haven't this command aviable! :(

Pls, could somebody help me, I really need to busy out my channels.

Thx a lot.