User guide

The EDA Components
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Figure 26 Migration from Ethernet to ATM through EXN401/410
4.6 Remote Powering
Remote powering is a concept for distributing DC power over existing
twisted pairs. Remote powering is typically used in broadband applications,
where telecom equipment located close to the end-user requires power.
What makes remote powering attractive is the independence of local power
utilities and centralized back-up systems (batteries). The system consists of
a Remote Power System at the Central Office and a converter at the
Remote Site. The design of the system is based on safety standards IEC
60950-21, IEC 60950-1, and GR 10989-CORE.
At the Central Office the Flatpack Remote Power Systems are designed for
remote powering of telecom equipment, and provide ±190 V DC from a 48
V DC source. The power system consists of a 2HU Flatpack Mini PRS
chassis, 19” or 21” (ETSI) wide. This chassis houses up to two DC/DC
converters and VA limiters (24 channels).