The A-POI is an Active Point of Interface used to connect various DAS feeders like BTSs (Base Transceiver Stations), Small Cells, or RRH (Radio Remote Head) and/or Off Air Repeater to the DAS Optical Master Unit (OMU). Up to 16 different services can be connected to each A-POI shelf. Each APOI shelf consists of 8 plug in BTS interface modules (BTSI). Each BTSI covers one single band and supports up to 2 BTS ports.The supported services are: 800, 900, 1800, 2100, 2600 plus 700LTE, SMR 800 (Sprint), Cellular 850, 1900 and AWS. Each BTSI can be either un-duplexed (separate ports for TX/RX) or duplexed (single port for TX/RX) configuration. Thus allowing different connections to different BTSs.
The APOI has a patented Smart ALC control loop that enables auto calibration per each APOI port. The Smart ALC algorithm will cause the APOI to provide constant pilot signals in all traffic scenarios while maintaining the output power levels required. The APOI also enables manual calibration per port when required by the operators. Up to 5 APOI shelves can be cascaded together via IP switch and display card. The LCD will display the APOI shelf number.
Remote management can be done via wireless modem or Ethernet. The modem types available are GSM, WCDMA or CDMA 1x. The system can be monitored and controlled via the Cobham Wireless’ network management software - AEM (Active Element Manager) system.