Juniper CTP151 Platform, Руководство по оборудованию, Страница: 34 / 104

Table 9: Cabinet Requirements for the CTP151 Device
Guidelines Cabinet Requirement
The minimum cabinet size for accommodating a CTP151 device is 36 in.
(91.4 cm) deep. Large cabinets improve airflow and reduce the chance of
overheating.
Cabinet size and clearance
When you mount the CTP151 device in a cabinet, ensure that ventilation
through the cabinet is sufficient to prevent overheating.
•
Ensure that the cool air supply you provide through the cabinet adequately
dissipates the thermal output of the CTP151 device.
•
Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet
without recirculating into the CTP151 device. An open cabinet (without a
top or doors) that employs hot air exhaust extraction from the top allows
the best airflow through the chassis. If the cabinet contains a top or doors,
perforations in these elements assist with removing the hot air exhaust.
•
Install the CTP151 device in the cabinet in a way that maximizes the open
space on the side of the chassis that has the hot air exhaust.
•
Route and dress all cables to minimize the blockage of airflow to and from
the chassis.
•
Ensure that the spacing of rails and adjacent cabinets allows for the proper
clearance around the CTP151 device and cabinet.
•
A cabinet larger than the minimum required provides better airflow and
reduces the chance of overheating.
Cabinet airflow requirements
RELATED DOCUMENTATION
CTP151 Platform Overview | 3
Mounting a CTP151 Device on Two Posts in a Rack | 53
CTP Cabling Recommendations
We suggest that you comply with the following recommendations:
•
Ensure that cable distance and rate limits meet IEEE-recommended maximum speeds and distances for
signaling purposes. For information about attenuation and power loss in optical fiber cables see:
•
ANSI T1.646a-1997 Telecommunications – Broadband ISDN - Physical Layer Specification for
User-Network Interfaces Including DS1/ATM (1997)
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