User's Manual

Overview Wideband Radio Head
1-6 044-05251 Rev A
Fiber Optic Unit (FOU)
The FOU is a metal plate mounted on top of the cover plate in the upper part of the WRH. The FON and
fiber optic connectors are mounted on the FOU. It can also be configured with combiners, splitters, and
WDMs to obtain a desired combination of several branches with double or single fiber.
Figure 1-5 FOU in WRH-V
Fiber Optic Node (FON)
The FON is the main part of the FOU. It is a bi-directional electrical/optical signal converter and a node
in a fiber network. In addition, the FON has all the functionality included in the CU PCBA and contains
battery backup. It has also functionality for:
• Electrical and optical signal supervision
• Internal and external alarm handling
• RS232 interface for local PC control via an O&M software (OM-Online)
• Remote control via an O&M software (OM-Online or OMS)
• Interfaces for RCU and FLI
• Battery backup with charger
There are two versions of the FON; one with three SMA ports (UL, DL and RX Mon) and the other with
four SMA ports (UL, DL, RX Mon and TX Mon). The FON has coaxial ports for DL and UL RF signals
and two optical ports for DL and UL fiber connections.
Power Supply Unit (PSU)
A PSU is located in the lower center of the cabinet and, if configured, the high cover.
Remote Control Unit (RCU)
The RCU is an optional communication unit for remote control of WRHs via PSTN or RF modems. RCU
types and details are described in Chapter 4.
Alarm Interface PCBA (ALI) and Remote Control Interface PCBA (RCI)
The ALI handles alarms and alarm communication. It is replace with an RCI if an RCU is used and
provides an interface between the CU and an RCU for remote communication via modem. The RCI
also handles alarms and alarm communication. Either unit is located in the lower left part of the
shielded DIA frame.