Outdoor Unit (Odu) Description; Ifu Unit Descriptions; Supervisory Unit; Radio Interface Unit - Riu - Nera Evolution Series Technical Description

2.2.

OutDoor Unit (ODU) description

The ODU hardware is capacity and modulation independent. It consists of a XCVR and a Diplexer. The
XCVR is tuneable over the whole frequency band, both high and low part. The diplexer determines the
sub-band coverage. The ODU is normally mounted directly to the antenna for all configurations. In HSB
and 1+1/2+0 configurations an RF-Coupler is used when connecting the ODU to the antenna interface.
An optional pole mount kit is available.
2.3.

IFU Unit Descriptions

2.3.1.

Supervisory Unit

The Supervisory Unit is handling the configuration of all the system units as well as reporting system
status to the EM/NMS system. It has two 10/100 BASE-TX Ethernet ports and two USB ports; one host
port and one device port.
The Ethernet ports are connected to an internal switch and can both be used for connection to the
EM/NMS system and/or for connecting terminals together in an Ethernet LAN.
One of the Ethernet ports (LAN2) can be used for user traffic. The Ethernet traffic is mapped in to nxE1
or nxT1 and then into the radio-frame mixed with TDM circuits. Capacity is limited by the configured
link capacity. Ethernet capacity is selectable in E1/T1 steps.
The USB host port serve as the LCT port. The USB ports can also be used to connect IFUs together, and
the host port can be used as interface for storage devices for SW backup and download.
2.3.2. Radio Interface Unit – RIU
The RIU contains the interface for connecting the IFU to one ODU with a single coaxial cable. It also
contains the connector for power supply to IFU and ODU.
2.3.3. Line Interface Unit – LIU
The LIU contains the interface for connecting the user traffic to the IFU. In addition to the LAN-port on
the Supervisory Unit, LIUs are available for E1 or T1. For interfacing to a SDH/SONET system, a STM-
1/OC-3 LIUs is used in combination with the DXC-Unit.
2.3.4.

SDH/SONET Digital X-Connect Unit

The optional SDH/SONET DXC is used in combination with the STM-1/OC-3 LIU to provide a
SDH/SONET interface on Evolution XPAND. The multiplex structure is selectable between SDH and
SONET. The DXC Unit handles the mapping and timing features necessary to interface to a
SDH/SONET system. The SETS function handles node synchronisation and selection of synchronisation
sources.
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Figure 2-3 ODU, 1+0 System
Evolution Series - XPAND NGP\00329 Rev. C 23-06-2006