OPU-1
UNIVERSAL POWER-LINE CARRIER SYSTEM TYPE OPU-1
GENERAL DESCRIPTION - Rev 7 (May 2019)
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AFPU
ADDITIONAL LINE FILTER
This module contains the line filter. This module is located in the additional
3 s.u. shelf.
The bandwidth of the line filter is selected configuring a jumper and two
switches in the additional 3 s.u. backplane.
WPPU
Additional 3 s.u. backplane
It contains the line transformer, the coaxial connector for making the
connection to the line, the jumpers for selecting the line impedance, the
dummy load, a setting to connect or not the coaxial-cable shield to chassis,
and the jumpers and switches for selecting the bandwidth of the additional
line filter.
The type of backplane depends on the line-filter bandwidth in this way:
WPPU.00
The bandwidth of the line filter may be 8, 16 or 24 kHz.
WPPU.01
The bandwidth of the line filter may be 8, 16 or 32 kHz.
2.4
OPTIONAL INTERNAL MULTIPLEXER
When working with a digital channel, the multiplexing of the different services, if desired,
can be carried out by using an optional internal multiplexer.
There are two models of optional internal multiplexer, the description of each one being in
the following.
2.4.1
MXPU internal multiplexer
This optional internal multiplexer of the OPU-1 terminal consists of up to three
MULTIPLEXER modules (MXPU). Each MXPU module can house up to three ports. The
characteristics of a port depends on the type of submodule installed.
MXPU
MULTIPLEXER
This module conforms the internal multiplexer. It can contain up to three
submodules. There are three different types of submodule depending on
whether the port has to be data, voice at 16 kbit/s or voice at 4800 bit/s,
6400 bit/s or 8000 bit/s.
