Nortel Networks 1000M - Manual (Page 122)

122 Mounting the chassis
8 If you want to install a chassis expander on a wall in a horizontal
position, repeat the above steps for the chassis expander. Refer
to the equipment layout plan for the measurements and where to
position the chassis expander.
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Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Small System Installation and Commissioning
NN43011-310 01.04 Standard
Release 5.0 13 May 2008
Copyright © 2008, Nortel Networks
.