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1. BitStorm 1900 IP DSLAM
1900-A2-GN20-00 BitStorm 1900 Installation and Maintenance Guide 1-3
The BitStorm 1900 shelf and components are installed in a standard
19” rack and can be installed in 23” racks using optional 23” mounting
ears. Up to five (5) BS1900 Systems can be installed into one rack
depending on the application and the associated required components.
Refer to "Appendix B. Cabling Specifications‚" on page 115 for typical
rack configurations.
Depending on the application/configuration, the following components
are installed in the rack with the BitStorm 1900 Shelf to comprise the
system:
Air Baffle
The Air Baffle, installed above the Filter Shelf (or the BitStorm 1900
Shelf), is used to deflect the exhaust air flow out the rear of the rack.
When more than one BS1900 system is installed in a rack, the Air
Baffle prevents the heated exhaust air of one BS1900 system from
being drawn into the shelf of the BS1900 system installed above.
Fan Tray
The Fan Tray provides forced-air cooling throughout the BS1900
system. A Fan Tray is installed under each BS1900 Shelf and contains
six forced-air cooling fans to ensure sufficient cooling for the entire
system. The -48 V DC Fan Tray is ideal for the CO (Central Office) and
the 110/220 V AC Fan Tray has been uniquely designed for enterprise
applications.
Filter Shelf Option
The Filter Shelf contains low-pass filter splitters to separate out-of
voiceband signals from the voiceband traffic between the BitStorm
modems and the external voice facility equipment. Each Filter Shelf
contains up to 10 filter cards. One filter card supports 12 EtherLoop
lines installed in the BS1900 shelf. Depending on the application, more
than one Filter Shelf can be installed, one on top of another.