Installation Locations
80 7705 SAR-M Chassis Installation Guide
Typically, cabinets that comply with Telcordia GR-487, Generic Requirements for Electronic
Equipment Cabinets, provide this level of protection.
The 7705 SAR-M supports extended temperature operation, from –40° to 149°F (–40 to
65°C) and a cold start from –40°F (–40°C). The 7705 SAR-8 and the 7705 SAR-F support
extended temperature operation, from –40° to 149°F (–40 to 65°C) and a cold start from –4°F
(–20°C).
If the 7705 SAR-M, 7705 SAR-8, or 7705 SAR-F is powered by an Alcatel-Lucent external
AC power supply, the AC power supply has an operating temperature from –4° to 104°F
(–20 to 40°C).
Airflow on the 7705 SAR-M is defined as EC Class (S) SR-SL per GR3028. For proper
thermal performance, the following conditions must be met.
• The rack must be constructed using channel or angle rack uprights that are at least
1.25 in. (3.2 cm) deep and 5 in. (12.7 cm) wide (maximum) (see Figure 15).
• For seismic applications, the rack must be an approved Seismic Frame.
• 7705 SAR-M deployments in closed cabinets are not recommended. If closed
cabinets must be used, they must not restrict shelf airflow in any way. Furthermore,
they must not cause the shelf inlet bulk air temperatures to rise above those defined
in Chassis Location Requirements under worst-case environmental conditions,
including any preheating of the cabinet air by other equipment.
• The rail mounting holes in the equipment rack must align with the mounting holes on
the chassis mounting brackets. The 7705 SAR-M mounting brackets are
factory-installed for a NEBS mount in a 19-inch rack.
Chassis Location Requirements
Actively Cooled Variants
Allow at least 2 in. (5.1 cm) clearance on the sides of the chassis for proper airflow and at
least 2.5 in. (6.4 cm) in front of the chassis for cable management. See Figure 15.
Warning: Failure to comply with the location requirements outlined in Installation Locations
and Chassis Location Requirements may impede proper airflow, which may result in
equipment failure due to overheating.
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