User's Manual

MA2000 System Elements MA Base Unit

MA2000 Installation and Configuration Guide 21

2.3 MA Base Unit

The BU (Base Unit) is a wideband device that performs the conversion between the BTS/BDA

(passive or active) interface RF signal and the remote units’ optic signal.

Base Unit capabilities

• Supports all services distributed by MobileAccess systems

• Fiber connection to up to 8 RUs

• Setup and monitoring through connection to the host SC-450 controller and NMS software

application

• Dry contact alarms

• Front panel indicators providing status on optical link internal circuitry and signal level

2.3.1 Base Unit Models and OPTMs

Two models of MA BUs are available:

• Four-port unit – supports optic connections to four RUs

• Eight-port unit – supports optic connections to eight RUs

Each 4-port unit is referred to as OPTM. An 8-port unit consists of two 4-port modules or,

referred to as OPTMs.

NOTE: Each 4-port module (OPTM) is separately accessed and managed in the MCT and NMS

management applications.

2.3.2 BU Panels

2.3.2.1 MA BU Front Panel

The front panel contains the optical connections and indicators. Each four-port element has a

dedicated set of indicators (PWR, LSR and Link 1 to Link 4 or Link 5 to Link 8).

Figure 2-15. Eight-Port MA BU Front Panel

Figure 2-16. Four-Port BU Front Panel

Table 2-6. MA BU Front Panel Indicators

Four ports and corresponding indicators