ZIV DRA-2, Руководство пользователя

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DRA-2
DRA-2 UNIVERSAL COMMUNICATION NODE
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USER GUIDE - Rev.5 (January 2018)
1.3 DRA-2 INTERFACES
One noteworthy aspect of the DRA-2 is its large variety of interfaces, which enables it to
provide a solution to the different topologies present in Transformation Centres. In some
Transformation Centres, PLC-MV technology is the only valid option, whereas in others
optical fibre or even ADSL (PSTN) can be used. Moreover, in cases where none of the
above options can provide sufficient communication, wireless interfaces or cable modem
(HFC modem) can be used.
FIGURE 2 Constitution of the DRA-2 node
The different basic and optional interfaces are integrated into the following three principal
modules (see FIGURE 2):
POWER SUPPLY, CENTRAL PROCESSING UNIT AND BASIC LAN INTERFACES .
This is the basic DRA-2 module. As the Central Processing Unit and element that
adapts and controls the peripherals, it carries out advanced Ethernet switching
functions (L2), routing functions, access protocols, flows and congestion controls and
advanced traffic management functions.
It has 6 Fast Ethernet ports in a 10/100Base-Tx configuration.
It has also 2 receptacles for Gigabit Ethernet SFP transceivers.
The power supply is included in the basic module and there are two versions: the first
for use with continuous current of 48 V
DC
, while the second admits the use of
alternating current and continuous current, but in this case, from a voltage range of
over 80 V
DC
. Both versions generate the internal supply voltages based on the input
voltage, and have several input filters for protective purposes. The power supply is
protected against reverse polarity.