Connections; Figure 3. Ddm+ Htu-C Edge Connector Wiring - ADTRAN HDSL DDM+ HTU-C Installation And Maintenance Practice

HDSL DDM+ Transceiver Unit for Central Office Installation and Maintenance Practice

CONNECTIONS

The DDM+ HTU-C occupies one card slot in a DDM+ shelf. Power and alarm signals are
provided to the card through the backplane of the shelf. DSX-1 and HDSL loop signals are
connected to the shelf connector and transmitted to the corresponding slot the unit occupies.
Refer to Figure 3 for DDM+ HTU-C edge connection wiring.
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Figure 3. DDM+ HTU-C Edge Connector Wiring

LP1 Tip
LP1 Ring
LP2 Tip
LP2 Ring
DSX-1 Rx Tip
DSX-1 Rx Ring
DSX-1 Tx Tip
DSX-1 Tx Ring
Alarm (to Alarm Module)
-48V Return
Frame Ground
HDSL Loops 1 and 2 are full duplex
loops — capable of simultaneously
transmitting and receiving data.
-48V
-48V Return
-48V Return
61247003L6-5A