Our Point to Point Optical Modules (Master TTRxPTPM and Slave TTRxPTPS) provide an Optical Point to Point link allowing a separation distance -up to 20km- between the RF modules interfacing the signal source (POI and TDFE) and the Optical Modules, interfacing Remote Units (Fiber Optic Transmitter/Receiver modules).

The point to point link is suitable when the signal source (BTS, Node B, Repeater) is located far from the area to be covered or when the same Optical System provides coverage to several separate buildings; in these applications the point to point link allows the transmission of signals from/to a group of Remote Units over a single optical fibre, thus providing a significant reduction in the number of fibre optics running long distances.

Architecture

The point to point link requires the RF interface modules to be connected to Master Point to Point modules and the remote Fiber Optic Transmitter/Receiver modules to be connected to Slave Point to Point modules: each Master Point to Point Module is connected to a distant Slave Point to Point Module via a single optical fibre (single-mode SMR 9/125).
The Master and Slave Point to Point Modules perform the electrical-to-optical/optical-to-electrical conversion required for the transmission of downlink and uplink signals over the connecting optical fibre.

The RF Interface Subracks can be equipped with up to 4 Master Pont to Point modules for the management of up to 4 Optical Subracks, installed in different remote locations.

The Slave Point to Point module includes the 4-way splitter/combiner to manage up to 4 remote Fiber Optic Transmitter/Receiver Modules. A built-in Slave Supervision unit controls the remote Optical Subrack, hosting the Slave Point to Point module, and all connected Remote Units. The Slave Supervision is managed by the Coverage System Master Supervision module via the optical fibre connecting Master and Slave point to point modules.