2-36
Equipment
AN2016 Cabinet User Guide Rel 1.0 Standard May 1999
Copper-distribution shelf
The NT4K12 copper-distribution shelf (CDS) provides copper interfaces to
serve subscribers on loops of up to 1900 ohms (including the telephone set).
Five different types of line interface units support a full range of copper-based
services.
The CDS is divided into two drawers each containing 48 line interface slots
for:
• 2-wire services
• 4-wire services
• 6- or 8-wire services
Mounted between the two drawers are two redundant power converters that
supply power to the line interface units (see Figure 2-25).
For detailed information regarding the copper-distribution shelf and circuit
pack descriptions, refer to Signal Flow and Circuit Pack Description,
323-3001-102, in Description, Volume 2A.
CAUTION
Risk of damage to equipment
During initial setup of the AccessNode, Nortel Networks
recommends that the equipment side remain disconnected
from the outside plant subscriber loops (at the protector
modules) until the line cards are installed and powered up.
For example, when you use five-pin protector modules, pull
the modules out slightly to the first detent position.
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