4.9.2 Optional Installation — Connectors at the Rear of Rack
For rear mounting of the chassis, the rack ears should be moved prior to rack installation. Unscrew the
six size 2 Phillips screws holding the rack ears, and move the six screws covering the rear mounting
holes to the front mounting holes. Remount the rack ears at the rear end of the unit.
Install the unit as described in section 4.9.1.
Figure 4.11: Rack Ears Mounting – Side View of VB200/VB200-DC Chassis
4.9.3 Optional Installation — Mid-Mounting
The Enhanced Chassis allows rack ears to be mid-mounted. This can be convenient if the chassis is
installed in a telco environment. Unscrew the six size 2 Phillips screws holding the rack ears, and move
the six screws covering the mid mounting holes to the front mounting holes. Remount the rack ears at
the middle of the unit.
Figure 4.12: Rack Ears Mounting – Side View of Enhanced Chassis Showing Screw Holes
4.10 Powering up the Unit
For the VB220, once the chassis is securely mounted and signal cables are connected, it can be powered
up by connecting the power cable to a mains source. When the power cable is connected the power
LEDs of the individual optional modules should light up and the chassis fans should operate.
For a VB200-DC unit (–48V power supply) the shipped 3-PIN D-sub(15) plug should be soldered to the
power cable prior to power-up. Refer to section 4.5.3 for a description of this plug.
For the VB20, just connect the mains source and the diodes should light up.
Note that it will take some time from power-up until the modules can be accessed via the management
interface – typically the start-up may take up to two minutes.
32 VB2xx GigE User’s Manual version 5.4
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