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1. BitStorm 1900 IP DSLAM
1900-A2-GN20-00 BitStorm 1900 Installation and Maintenance Guide 1-29
Low-Pass Filter Specifications
Filter Shelf
Low-Pass filters are used with the BitStorm 1900 in EtherLoop
applications where voice service is required. The low-pass filter cards
separate out-of-voiceband signals from the voiceband traffic between
the BitStorm modems and the external voice facility equipment. The
Low-Pass Filter Shelf contains one filter card for every two 10306
modem cards, or two filter cards for every 10224 modem card.
The filter shelf connects to the distribution frame, designed to minimize
signal interference and facilitate broadband connectivity by isolating
Digital Service Units (DSUs) from the Private Branch Exchange
(PBX). Refer to Figure 1-11 on page 30 for Filter Shelf Specifications.
Filter 66-Block
The Filter 66-Block provides the same function as the filter shelf,
however, it is a space saving and economical alternative to the filter
shelf for large enterprise installations. Refer to Figure 1-11 on page 30
for Filter 66-Block Specifications.