Aastra OpenCom 510 User Guide - Page 29
Slots, Legend
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Installation Installing Modules 4.4.1 Slots The OpenCom 510 1-12 frame can house up to: ■ 2 power supply units ■ 1 control module ■ 12 interface cards (trunk or subscriber modules) split into 2 separate groups. The following slots are provided for installing these modules: Legend A Slot for group 1 power supply unit B Slot for group 2 power supply unit 0 Slot for central control module C Slots for group 1 interface cards (slots 1 - 6) D Slots for group 2 interface cards (slots 7 - 12) Each of the two groups (1 or 2, or C and D, respectively, in the illustration) requires its own power supply unit. Power for the control module is always supplied by the group 1 power supply unit. The group 1 power supply unit must therefore always be installed. Modules can be installed either when the entire system is configured or as an upgrade at a later time. 27