Chapter 8 Installing a media bay module (MBM) 115BCM200/400 4.0 Installation and Maintenance GuideChoosing the assigned order for MBMsAssign the MBMs and DS30 buses in the order shown in Figure 69 on page 115.Station MBMs are assigned starting with DS30 2. This allows telephones to start numbering fromthe system Start DN (the default is 221).Trunk MBMs are assigned starting at DS30 7 in a system with a 2/6 DS30 split, and at DS30 6 in asystem with a 3/5 split. The exception to this is the 4x16 and the DDIM, which require two DS30buses that must be set to a DS30 that has the next bus open.Figure 69 Assigning single-density MBMs to the DS30 bus hierarchyTrunk MBMs are assignedstarting with the lastavailable MBM DS30 bus(DS30 6 or 7, depending onthe bus split in effect).Exception: a 4x16 or a DDIMcannot be assigned to thelast DS30 bus.234567*DS30busesDN assignmentbegins with Start DN(default: 221)Station MBMs are assignedstarting at the top (DS30 2) ofthe available MBM DS30buses.Lines start at 61 onDS30 73/5 bus split* DS30 7 is not available to any MBM if your system has beenconfigured with a 3/5 bus splitMBMs that require two DS30 buses, such as the DSM32 and the4x16, must be assigned to DS30s higher than 6, to accommodate allthe resource requirements.234567*DS30busesCTM4x16DSM 32Example ofNorth American-based setupAfter you choose your MBMs, choose where toassign them on the DS30 buses Example of aEuropean- basedsetupDSM 32DSM 16DS30 5 supports thestation part of the 4x16BRI67*DSM 32DSM 32BRIDECTDSM 16CTMCTM
