Operating Environment; Space Requirements; Environmental Requirements; Acoustic Characteristics - IBM 8237 Installation And User Manual

Operating Environment

This section specifies the physical environment required by 8237s.

Space Requirements

If you will connect multiple 8237s in a stack, be sure that you have enough space
available in your rack or shelf for the number of hubs that will be stacked together.
Allow at least 76 mm (3 in.) at the back and 50 mm (2 in.) at the sides of the 8237 to
ensure proper cooling. Leave 200 mm (8 in.) in front for viewing the LEDs, installing
Expansion Ports, connecting cables, and for air circulation.

Environmental Requirements

Power-on temperature
Relative humidity
Storage temperature

Acoustic Characteristics

Table 1-2 is a declaration of the 8237's noise emission characteristics.
Table 1-2. Noise Emission Characteristics of the 8237
Type Description
Stackable
Ethernet
8237
Hub
Notes:
is the declared sound power emission level for a production series of machines.
L
WAd
is the mean value of the sound pressure emission levels at the operator position (if any) for a production
L
pAm
series of machines.
is the mean value of the space-averaged sound pressure emission levels at the one-meter position for a
<L >
pA m
production series of machines.
N/A
not applicable (no operator position).
All measurements were made in accordance with ISO 7779 and reported in conformance with ISO 9296. These are
preliminary values and are subject to change. The final values will be available from IBM Manufacturing for production
machines.
10° to 40°C
(50° to 104°F)
85% maximum
-25° to 70°C
(-13° to 158°F)
L
WAd
Operating Idling Operating
(bels) (bels)
5.1 5.1
L
pAm
Idling Operating
(dB) (dB) (dB)
N/A N/A
Chapter 1 Introduction and Planning
<L >
pA m
Idling
(dB)
37 37
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