AT&T 518-600-016 manual Slot assignments for modules in the basic, Following, Slots 2 through

DETERMINING	The slot assignments for modules in the basic and
MODULE SLOT	expansion carriers are shown in Figure 2-14.
ASSIGNMENTS	In order to function, a basic carrier must contain the
	following:
	● A Power Supply Module in the leftmost slot
	● A Processor Module (equipped with a Feature Module)
	in slot 0
		CAUTION: The Feature Module must be installed in
		the Processor Module before installing the
		Processor Module in the carrier.
	● An Analog Voice Terminal Module, either the
	4-line 8-Analog Voice Terminal (408) Module or the
	8-Analog Voice Terminal (008) Module, in slot 1
	● Line, tie line, or other modules can then be placed in
	slots 2 through 5
	The only requirement for an expansion carrier is that the
	leftmost slot must contain the Power Supply Module.
	Slots 6 through 11 can be filled with additional modules.
	Install modules on the carrier from left to right.
	CAUTION: Do not leave empty slots between modules
	in the carriers. The MERLIN II system will ignore
	modules installed beyond an empty slot.

Installing the Control Unit 2-61