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Power Supply
The SHDSL 2-Wire/4-Wire LTU supports Terminal Block, Span or DC powering.
DC Powering
Physical connection for DC operation is made on a 4-pin terminal block, shrouded male recep-
tacle. The DC model operates over a DC input range of ±42 VDC to ±56 VDC (–48 VDC
nominal), with a power rating not to exceed ten watts. A detachable mating terminal-screw
block is supplied separately.
Span Powering
When span powered, the SHDSL 2-Wire/4-Wire LTU adheres to sections ITU-T G.991.2 Annex
B.5.3 as it applies to LTUs.
SHDSL Pinout
The SHDSL port uses a TNV-3 rated, 135W impedance, RJ-45 connection with signals and
pinouts (refer to
Table
Pin
1
2
Ring 2
3
4
5
Ring 1
6 - 8
61230011L1-5B
8).
Table 8. SHDSL Port RJ-45 Pinout
Name
Function
Tip 2
4-Wire Loop, 2 Pair Tip
4-Wire Loop, 2 Pair Ring
NC
Not Connected
Tip 1
2-Wire Pair Tip, 4-Wire Loop, 1 Pair Tip
2-Wire Pair Ring, 4-Wire Loop, 1 Pair Ring
NC
Not Connected
Circuit
Connections
11
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