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Installing the Device
3-4 Installation
Figure 3-1 Tabletop or Shelf Installation
3.3.2 Rackmount Installation
To install the 2H253-25R in a 19-inch rack, Cabletron Systems includes a strain-relief bracket for
cable management and an accessory kit containing the rackmount brackets, and mounting screws
to attach the rackmount brackets and strain-relief bracket.
Guidelines for the Rackmount Installation
The installation site must be within reach of the network cabling and meet the requirements listed
below:
• An appropriate grounded power receptacle must be located within seven feet of the location.
• Maintain a temperature of between 5°C (41°F) and 40°C (104°F) at the installation site with
fluctuations of less than 10°C (18°F) per hour.
!
CAUTION
To ensure proper ventilation and prevent overheating, leave a minimum clearance space
of 5.1 cm (2.0 in) at the left, right, and rear of the 2H253-25R.
WARNING
Before installing the 2H253-25R into a rack, ensure that the rack supports the device(s)
without compromising the stability of the rack. Otherwise, personal injury and/or
equipment damage may result.
2762-02
A = 15 cm (6 in)
B = 57 cm (22.5 in)
C = 53 cm (21 in)
C
B
A
D
D = 213 cm (7 ft)
2H253-25R
COM
PWR
CPU
RESET
LED
MODE
RX-TX
DPX-SPD
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2
3
4
5
6
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8
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14
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15
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FAST ETHERNET WORKGROUP SWITCH