Chapter 1 - Installing the ChassisChapter 1 1 - 9SECTION 1-4Expansion Chassis-E1.4.1 Expansion Chassis-EThe Expansion Chassis-E is used to install additional system blades and connects to the right of theControlling/Base Chassis-B. Combined with the Controllling/Base Chassis-B, it can accommodate up to 96ports (40 trunk/80 stations max.). With a maximum of 4 hard-wired Controlling/Base Chassis-Bs and 4Expansion chassis, the system will provide up to 184 trunks and 320 extensions and, with IP connections, amaximum of 200 trunk ports (128 IP trunks max.) and 512 station ports is possible.To reach these limits, a MEMDB would be required as well as a license for the expanded ports.Each chassis measures 9.5 inches wide. A Controlling/Base chassis with an Expansion chassis connected is atotal of 19 inches and 4.25 inches high.The Expansion chassis provide 3 universal slots for the optional blades (such as ESIU, SLIU, COIU, etc.) andan EXIFU (expansion) slot. All slots are connected to the backplane. The Controlling/Base chassis providesthe power through the backboard connector.A Chassis-B can be combined with an Expansion Chassis-E. Additional pairs of Chassis-B/Chassis-E’s can beconnected to the system (up to 4 chassis sets maximum). Expansion Interface Units (EXIFU-B1 and EXIFU-E1) are installed in the EXIFU slot in the Chassis-Bs (base chassis). The connection to the Expansion InterfaceUnit is made using a CAT 5 cable.Figure 1-6: CHASSIS-E! Important !● The Expansion chassis must only be installed with the system power OFF.