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4929-A2-ZN20-30 4929 DSLAM Installation and User’s Guide 17
INSTALLATION
Preparation
Consider the following before installing the DSLAM:
z Installation Site – Your installation site should be well ventilated, clean,
and free of environmental extremes.
z Installation Options – The DSLAM may be:
— Mounted with the included mounting brackets in a standard 19-inch
(483 mm) or 23-inch (584 mm) rack (including both Bay Networks
and Nortel 23-inch racks), or, with separately purchased mounting
brackets, in a 21-inch (535 mm) ETSI rack. ETSI brackets are
available. See Appendix B, Equipment List.
As many 4900 Series DSLAMs may be mounted in a standard rack as
there are 1.75-inch (44.45 mm) spaces in the rack, so long as
adequate cooling is provided.
— Mounted on a wall.
— Set on a shelf or desktop.
Up to eight 4900 Series DSLAMs may be stacked on a shelf or
desktop. Different models can be mixed in a stack.
z Power – The DSLAM operates from a –48 VDC power supply to allow
for standard power connections available in a CO. For AC voltage
environments, an external AC-to-DC power converter is required.