# Cabinet, Shelf, Slot, Circuit

## Overview

The 3300 ICP hardware uses terminology and concepts that were developed for the [SX-2000 - link] product. Figure 1 illustrates the usage of terms cabinet, shelf and slot. In this figure, the main controller connects to cabinets. Each cabinet consists of one or more shelves and each shelf has a number of slots.

NOTE: Each slot has a number of circuits, which Figure 1 does not illustrate.

Slot 1 is typically reserved for communicating between the main controller and the cabinet. The other slots are used for T1/E1, ONS, LS and other cards that no longer apply to a 3300 ICP.

Figure 1: Cabinet, Shelves, Slots

## 3300 ICP controller

In the 3300 ICP product, most of the SX-2000 physical hardware, such as T1/E1 card, has been virtualized.

In this document, the 3300 ICP controller is equivalent to a main cabinet. Each 3300 ICP can have several Mitel Mezzanine Card (MMC) modules plugged into it. MXe III controller can have six MMC modules, four of which have front panel access. One addition module is build into the main board (shown below as MMC 7).

The following figure shows the location of the MMC modules (top view, with the cover off).

NOTE: Do not use the term "slot" when referring to the location of the MMC module in the 3300 ICP. When programming the 3300 ICP in ESM, the MMC module is not the same as a cabinet and its location is not the same as a slot. In ESM, the MMC module is identified by the Controller Module number, which corresponds to the Unit number written on the controller.

Figure 2: 3300 ICP Main Cabinet

## T1/E1 MMC Module

The T1/E1 MMC module can be regarded as a virtual cabinet, with one shelf and three slots. Slot 1 is used for communicating with the main cabinet, slot 2 is one T1/E1 interface (Port 1), and slot 3 is the second T1/E1 interface (Port 2). Each T1/E1 slot as one link.

The cabinet number is the unit number assigned in the Framer forms in ESM.

Figure 3: T1/E1 MMC Module

## ASU II

The Analog Service Unit II (ASU II) can be regarded as a peripheral cabinet that has one shelf and six slots. Slot 1 is used for line card 1, slot 2 for line card 2, and slot 6 is for the controller card.

In ESM, the cabinet number is the unit number assigned in the Analog Services Units form.

Figure 4: ASU II