Chapter 3 - Installing Extensions and TrunksChapter 3 3 - 9SECTION 3-8EXTENSION CUTDOWN3.8.1 Extension Cutdown Sheet Configuration (Figure 3-11 - Figure 3-12)Due to the inherent flexibility of the universal PCB slot configuration, standard cutdown sheets for extensioncabling do not apply.For example, given that a 16ESIU is installed in slot #2 and uses extension numbers 301-316, if three 16ESIUPCBs or 8SLIU with the 8SLIDB PCBs were installed in the system in the order below, the numbering planwould correspond as follows:To determine extension assignments for the system cutdown, the installer must identify the following in order:● Order of installation● KSU (Controlling/Base, Expansion)● Slot used● PCB type (8ESIU, 16ESIU, 4SLIU, 8SLIU, 8SLIDB, etc.)● Connector used on PCBTo determine where any group of eight extensions is installed, note the order of install, KSU, slot, PCBconnector and PCB type.Order of Install PCB Slot # Ext Numbers1 1 301-3162 2 317-3323 4 333-3484 3 349-364The order in which the extension PCBs (8/16ESIU, 4/8SLIU, 4/8SLIDB) areinstalled determines the assigned extension number.
