Installation Instructions

1X UBS Macro B T S FRU DMI (Digital Module Internal) Assembly
DMI (Digital Module Internal) Assembly
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The R20 UBS Macro BTS only supports frame configurations with up to two DMIs
and up to two XMIs.
DMI Description
The UBS Macro BTS frame must be equipped with at least one instance of the DMI. A second
DMI is optional. The DMIs are located in the right side of the XMI shelf in the UBS Macro BTS
frame (see Figure 1 -1 UBS Macro BTS low -tier/low -capacity frame (1000 mm rack) on page
1 - 27 , Figure 1 -2 Low capacity UBS Macro BTS starter frame (1800 mm rack) on page 1 - 28 and
Figure 1 -3 UBS Macro BTS mid -capacity frame (1800 mm rack) on page 1 - 30 ). The DMIs are
stacked vertically in an XMI shelf slot. DMI 1 is on the top and DMI 2 is on bottom. If the
optional second DMI is not equipped, an empty DMI outer housing is in the DMI 2 position.
The DMI includes a DMI assembly that slides into a DMI outer housing. The DMI assembly
consists of a chassis with a controller board, two rear mounted cooling fans and a front panel.
The DMI assembly may also be equipped with up to two modem boards. When the UBS Macro
BTS frame equipment is shipped from the factory the DMI assembly is equipped with at least one
modem board. A second modem board is optional and may be either factory or field installed.
The DMI can be equipped with either 1X CDMA modem boards, EV -DO modem boards, or a
combination of one 1X CDMA modem board and one EV -DO modem board.
Each modem board mounts on opposite sides of the controller board. Modem board -to -controller
board electrical connection is via a printed circuit board mounted High Density Mezzanine
(HDMEZZ) type connector . Each modem board is secured to the DMI assembly chassis with
seven screws that are captivated to the modem board.
Figure 8 -1 Removing and installing Modem 1 on page 8 - 13 and Figure 8 -2 Removing and
installing Modem 2 on page 8 - 14 show the locations of Modem 1 and Modem 2 within the
DMI assembly .
The following rules apply to modem board location within the DMI:
• F or a DMI equipped with one 1X CDMA modem board, the 1X CDMA modem
board is always Modem 1 location
• F or a DMI equipped with one EV -DO modem board, the EV -DO modem board
is always Modem 2 location
• F or a DMI equipped with a combination of one 1X CDMA modem board and one
EV -DO modem board, the 1X CDMA modem board is always Modem 1 location
and the EV -DO modem board is always Modem 2 location
68P09283A64 -3 8 -3
FOA SEP 2007