Polycom DOC2559A - Manual (Page 20)

Chapter 1- Hardware Description
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3 Fasten the RMX to the rack with 8 screws into the holes provided on
the RMX’s front as shown in Figure 1-3.
Figure 1-3 RMX 4000 Rack Mount
The airflow of the RMX 4000 is from right to left. Be sure that the
areas on the left and right side of the system are clear for proper
ventilation.
Rack mounting screws must be supplied by the rack’s manufacturer.
When the unit is installed on a rack, the rack must be properly grounded to the
central office ground. The rack must be grounded with two-hole compression-
type connectors using copper conductors (tinned or untinned). Wire, bus bar or
braided strap connectors are acceptable.