Nokia DNT2Mi sp/mp Operating Instructions Manual page 36

36 (128)
Data Network Terminal Single-port and Multiport Operating Instructions
Earthing bar
Figure 22. Grounding principle of the remote-powered system
Note
If the remote power feed is connected in a wrong way, that is, if the pairs are
cross-connected at the DNT end, the receiving remote unit still functions
properly. However, in this situation data transfer is not possible. See Figure 23.
Lines correct
Line 1
Line 2
To remote
DC power
Power available and
data transfer possible
Figure 23. Remote power feed connection
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Line
Lines cross-connected
DNT2Mi-rp/mp
a
b Line 1
a
Line 2
b
Line
block
To remote
DC power
2
1.0 mm
Power cable
DNT2Mi-rp/mp
a
a
b
b
Line
block
Power available but data
transfer not possible
DN01145897
Issue 2-0 en