Nortel Meridian 1 Succession 1000M Installation And Configuration Manual page 49

Figure 18
Connectors on the back of the chassis expander
Figure 18 on page 49
expander.
Power cord
connector
25-pair
connectors
Cooling
The NTDK91 chassis and the NTDK92 chassis expander have forced air
cooling. As a result, you can install the chassis in a horizontal or vertical
position. The fan inside the chassis is controlled by heat. It runs at a reduced
speed at room temperature.
WARNING
Do not block chassis ventilation. Poor ventilation could
cause the system to overheat and damage system
components, which may result in service interruption.
Chassis system equipment
shows the connectors on the back of the chassis
DS-30X
connector
Small System
Page 49 of 562
CE-MUX
connector
Installation and Configuration