Ericsson MINI-LINK TN R3 ETSI Technical Description page 107

5.3.1.2 Control and Supervision
This block handles system control and supervision. Its main functions are to
collect alarms, control settings and tests.
For the traffic over the hop it handles BER collection and communicates with
processor in the RAU through the RCC.
Exchange of control and supervision data over the hop is made through the
HCC.
Local management of ATU C is done with MSM software.
5.3.1.3 Power
The external power supply, 24–60 V DC, is connected to the unit.
This block provides secondary voltages for the unit and a stable voltage for the
RAU, distributed in the radio cable.
5.3.1.4 Radio Frame Multiplexer
The Radio Frame Multiplexer handles multiplexing of different data types into
one data stream, scrambling and FEC encoding.
The following data types are multiplexed into the composite data stream to
be transmitted over the radio path:
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•
•
Traffic
The transmit traffic data is first sent to the multiplexer to assure data rate
adaptation (stuffing). If no valid data is present at the input, an AIS signal is
inserted at nominal data rate. This means that the data traffic across the hop is
replaced with ones (1).
DCC
DCC comprises 2x64 kbit/s channels used for DCN communication over the
hop.
HCC
The Hop Communication Channel (HCC) is used for exchange of control and
supervision information between the near-end and far-end.
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
Traffic
Data Communication Channel (DCC)
Hop Communication Channel (HCC)
Access Termination Unit (ATU)
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