Expansion Stages and System Capacity36 Aastra 470 as of R1.2syd-0337/1.2 – R1.2 – 11.20113. 2. 1 Interfaces, display and control elementsThe interfaces accessible from the outside are located on the front and rear side ofthe basic system. The housing cover only needs to be opened when fitting an addi-tional fan (see "Fitting an additional fan", page 80).Basic system (without call manager card)The figure below shows the positions of basic system interfaces without call man-ager card.Fig. 8 Position of the interfaces on the basic systemTab. 12 Interfaces of the basic systemInterfacesNumberofentriesPosition RemarksSlot for Call Manager card CPU1 1 [1] Device ships already equippedSlot for application card CPU2 1 [2] Can be fitted as an optionSlots for interface cards 7 1)1) 1 fewer slot if CPU2 application card is fitted[3] Can be fitted as an optionInterface for redundant fan unit 1 Connectors inside the housingEarth connection 1 [4]Mains socket for 115/230 V power supply input 1 [5]115/230 V voltage converter 1 [6]Socket for auxiliary power supply unit APS2 1 [7][4][3][2][1][6][5] [7]
