Nebs Standard - Polycom DOC2237A Hardware Installation Manual

Chapter 2 - Hardware Installation

NEBS Standard

2-8
5. Carefully rotate the MGC-100 counterclockwise 90°, making sure the
Control Unit is at the bottom left.
6. While supporting the MGC-100, place it on the 19" rack and screw the
brackets to the rack, securing it with the screws and nuts supplied with
the rack.
For installations based within the United States, an MGC-100 DC NEBS
compliant system is available. The NEBS compliant systems differs in its
construction of the frame and the power supply. All else remains the same.
The construction of the MGC-100 is 12 U's, (1 U = 4.3 cm) which makes it
higher by 3 U's than the original frame of the MGC-100. This design allows
for a cushion of air to be present, ensuring safety in case of a heat related
problem.
In addition, the power supply is also designed differently by allowing the
circulation of cool air, providing a safety tolerance in case of a heat related
problems.
Use only shielded LAN cables where the shield is grounded at both ends
when connecting to the IO LAN port of the IP+48 on the MGC+ rear panel.
CONT NET-8 NET-8 NET-8 NET-E1
Critical
Stby Stby Stby Stby
Major
Fail Fail Fail Fail
Minor
Active Active Active Active
L0
Line 1 Line 1 Line 1
Line 2 Line 2 Line 2
Line 3 Line 3 Line 3
Line 4 Line 4 Line 4
Power Line 5 Line 5 Line 5
Line A
L1
Line 6 Line 6 Line 6
L2
Line 7 Line 7 Line 7
Line B
L3
Line 8 Line 8 Line 8
Figure 2-4: NEBS Standard Unit Front View
MUX MUX DATA DATA VIDEO VIDEO VIDEO VIDEO AUDIO AUDIO
Stby Stby Stby Stby Stby Stby Stby Stby Stby Stby
Fail Fail Fail Fail Fail Fail Fail Fail Fail Fail
Active Active Active Active Active Active Active Active Active Active
AUDIO AUDIO
Stby Stby
Fail Fail
Active Active