ALLIANCE Multi-Operator DAS BTS Interface Unit (BIU)

ALLIANCE is SOLiD’s multi-operator, neutral host Distributed Antenna System (DAS) that efficiently delivers wireless RF signals into any indoor or outdoor location difficult to cover with traditional macro networks.

In ALLIANCE, the Base Station Interface Unit (BIU) is the central input point for all source signals sent and received over the DAS.

* Multiple frequencies in a single unit

* RF power control guarantees power to each operator as configured in management software.

* Plug-in components for adding additional operators without the need for additional architecture

* Advanced filtering capabilities. 4G Certified. MIMO capable

* Auto Level Control (ALC) uplink and downlink for each service

The BTS Interface Unit (BIU) receives downlink signals from the base station (BTS) or bi-directional amplifier (BDA). Each signal is then independently monitored, filtered and controlled automatically in the BIU and transmitted to the system’s Optic Distribution Units (ODUs). The Donor Optic Units (DOUs) in the ODU convers the RF signals to optical signals and transmits them via fiber to the Remote Optic Units (ROUs).

At the ROU, signals are amplified and sent via coax to the remote antennas placed throughout the building or campus. For the uplink path, the process is reversed allowing the BIU to route each frequency to the proper operator.

TX input power range for the BIU is -20 dB to +10 dB. Variable attenuation is available up to 30db for both the TX and RX paths. Currently supported bands are shown in the next table. .

Each BIU can support 18 discrete inputs. For deployments with high capacity requirements, the DAS can support two BIUs configured as a primary/secondary pair connected with the BIU combiner. Two BIUs can support up to 34 discrete inputs.