Aastra OpenCom 131 User Guide - Page 32
Installing Interface Cards, 3.7.1 V.24 and Doorstation Equipment Slots
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Installation Installing Interface Cards the expansion module first and then plug in the plug-in power supply. 3.7 Installing Interface Cards The expansion module and the basic module of the OpenCom 130 resp. the main module of the OpenCom 150 can be expanded using interface cards. The main module of the OpenCom 131 is quipped with one large and two small slots for installing interface cards. Please note: Turn off the OpenCom 100. Unplug the plug-in power supply and (for an OpenCom 130 / 150) the main supply from the socket. You must not install or uninstall interface cards while the OpenCom 100 is turned on. 3.7.1 V.24 and Doorstation Equipment Slots Doorstation V.24 equipment OpenCom 130: V.24 and doorstation equipment slots Doorstation V.24 equipment OpenCom 131: V.24 and doorstation equipment slots 30