Chapter 3 - Installing Extensions and Trunks
Chapter 3 3 - 21
SECTION 3-13
LINE/TRUNK CUTDOWN SHEET
3.13.1 CO/PBX Line Cutdown Sheet Configuration (Figure 3-12, Figure 3-13)
Due to the flexibility of the system’s universal blade slot configuration, standard cutdown sheets for CO/PBX
line cabling do not apply.
✎ Note: The order in which the trunk blades are installed determines the assigned line circuit number.
For example, if four 4COIU's are installed in the Controlling/Base chassis in the following order, the following
numbering plan would be in effect:
To determine trunk assignments for the system cutdown, the installer must identify the following in order:
● Order of installation
● Chassis (Controlling/Base, Expansion)
● Slot used
● Blade type (4COIU, 4COIU with 4COIDB, 4TLIU, etc.)
● RJ61 connector
To determine where any group of lines are installed, note the order of install, chassis, and slot.
On the following page is the line cutdown sheet (Figure 3-12). Make as many copies as you need. Be sure to
keep careful records of your installation. Refer to the sample line cutdown sheet (Figure 3-13) if you need help
completing Figure 3-12.
Order of Install Blade Slot # Line Circuits
1 4 1-4
2 5 5-8
3 7 9-12
4 6 13-16
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