1
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Installation of the UMAP 2110
1.2.3 Power and Ground Connections
Figure 1-4 DC Power connection and power switch of UMAP 2110
DC Power Connections
The DC power interface is a 4-pin terminal block with polarity signs on the front panel of the
DSLAM.
The UMAP 2110 can be powered from two –48V DC power supply. The DC power connector is a
4P terminal block; 2P is for accommodating one DC power input and other 2P is for accommo-
dating another DC power input. The DC power should be connected to a well-fused power supply.
After completing chassis installation, please apply power to the fused power distribution panel
feeding the chassis. When using a DC voltmeter, please check for proper voltage: -60V ~ -36V DC,
and make sure that the polarity is correct.
Warning —
Ensure that all power sources to the chassis (power distribution panel) are turned off
during the connection.
Note —
It is recommended that the -48VDC power be supplied directly and independently by a
power feeding system and also avoid having a parallel or mutual connection with other
-48VDC power supplier of telecom equipment. This is to guarantee our products against
interferences by other equipment while they are working.
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