Ericsson MINI-LINK TN R3 ETSI Technical Description page 101

5.2.1 Functional Blocks
This section describes the functions of ATU based on the block diagram in
Figure 82 on page 95.
E1
E1
E1
Line
E1
Interface
E1
E1
E1
E1
10/100BASE-T
Traffic
Ethernet
10BASE-T
Site LAN
O&M
USB
External Power
Power
Supply -48 V DC
Figure 82 Block diagram for ATU
5.2.1.1 Line Interface
This block provides the eight E1 line interfaces for connection of PDH traffic.
It interfaces the Multiplexer/Demultiplexer block by transmitting and receiving
the traffic (nxE1).
5.2.1.2 Ethernet
This block provides the 10BASE-T interface for connection to a site LAN and
the 10/100BASE-T interface for Ethernet traffic in Ethernet bridge applications.
The Ethernet traffic is mapped on nxE1, where n≤16, using one
inverse multiplexer. The E1s are transmitted to and received from the
Multiplexer/Demultiplexer block.
5.2.1.3 O&M
This block provides the LCT connection. The equipment is accessed using a
local IP address.
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
Traffic
nxE1
Multiplexer/
Demultiplexer
Traffic
nxE1
Control and
Supervision
Secondary
voltages
Access Termination Unit (ATU)
Radio Frame
Modulator
Multiplexer
DCC
HCC
Radio Frame
Demodulator
Demultiplexer
HCC
DCC
RCC
RAU
Cable
Interface
8468
95