Operation Manual

Table Of Contents

Fiber Distributed Antenna System (Fiber DAS)

Master Frame Unit (MFU)

The Master Frame Unit (MFU) houses the Power Supplies, Base Station Interface Units (BIU), Interconnection Units

(ICU), and Fiber-Optic Interface (FOI) cards.

Figure 3

shows an MFU equipped with 3 BIUs, 6 FOIs and one Power

Supply.

Figure 3 Master Frame Unit

Functional description

One MFU supports several modules, or combination of module types. The modules can be placed anywhere in the

frame. There are 16 single slot card positions in each MFU, however module widths vary (see each module’s

specifications) so the number of module that will fit in an MFU depends on the module type. One MFU can house

up to 4 power supplies, 8 ICUs, 8 wide BIUs, 16 slim BIUs, 16 FOIs, or combination of modules. See

Table 2

Each MFU requires at least one power supply, although the power supply does not need to be housed within the

MFU. Quite often a system has more than one power supply and they are usually placed together in one MFU for

easy access. Each MFU has two power input connectors, one primary and one redundant. A redundant power

supply connected to an MFU ensures continued operation if one of the power supplies should fail.

The MFU contains two ventilation fans circulating ambient air through the units housed in the frame. These are high

quality fans with a high mean time between failure (MTBF).

Each Module in the MFU are assigned an IP addresses via DHCP leases, modules inherit the MAC address from the

backplane, this ensures that a new module inserted in the rack receives the same IP address as the one it is

replacing, without the need of manual configuration.

Table 2 MFU Specifications

Parameter Value

Input Voltage 28 VDC

Power connector Molex, 10 Pin

Ethernet connector RJ45

Weight (without modules) 5.5 lbs (2.5 kg)

Temperature range, Operational 0 to 40 °C (32 to 104 °F)

Width 19” (48.3 cm)

Height 3 U, 5.25” (13.34 cm)

Depth 11.8” (30 cm)

Maximum number of each type of modules supported

PSU 4

BIU (DBI3xx, DBI3xxC(compact)) 8, 16

FOI (DOI401, DOI30x) 8, 16

ICU 8