User's Manual

Remote Fiber Node (RFN) User Manual

7.2. Plug-in

Figure 8

7.3. System Block Diagram

Figure 9 demonstrates a 1 x 4 system link configuration comprising of 4 RFNs and Headend

segments that makeup a link, such as OMU, FTU-RF, FTU-E and RIS. RIS is the last F-S

equipment interfacing with the end-user Base Transceiver Station (BTS).

In this section, an overview is provided of the Headend equipment incorporated as part of a

typical RFN application.

Optical Multiplex Unit (OMU) houses all the passive optical devices interfacing with incoming

and outgoing fiber bundles which are then neatly individualized, routed and channeled to

interface with the Optical Add/Drop Multiplex (OADM). Next, each designated ITU

connection interfaces with the FTU-RF and FTU-E.

Fiber Transceiver Unit – Radio Frequency (FTU-RF) houses all the active optical devices that

converts light into electrical and vice-versa launches light from received electrical. In the

receiver there is filtering, post amplification, and gain adjustability for fine tuning as required.