Additional 6.0 inches (15.24
cm) rear clearance for removal
and installation of power
supplies and fan modules.
The
NCS-57C3-MOD
power supplies are
installed from the
front of the chassis;
therefore, additional
rear clearance is not
required for
NCS-57C3-MOD
chassis.
Note
56.0 inches (15.24 cm) front clearance
for air intake/exhaust.
2
Chassis depth:
• NCS-57B1: 23.6 in. (59.944
cm)
• NCS-57C3-MOD: 12.55 in.
(31.88 cm)
3
• The temperatures are measured at the air inlet to the equipment.
• The temperatures are valid at sea level. The maximum allowable temperatures are reduced at higher
altitudes. Altitude derating 1°C for every 300m.
• In case of a single fan failure, the maximum allowable temperature will be less than specified.
• In case the air filter is clogged, the temperature alarm may be raised at temperatures below the listed
temperatures.
Note
Airflow Directions
The airflow through the fan trays and power supplies on the Cisco NCS 5700 series router is either from the
port side exhaust or the port side intake, depending on how the modules were ordered. To ensure proper
airflow, you must make sure that when you install the router its air intake is positioned in a cold aisle and the
air exhaust is positioned in a hot aisle.
Hardware Installation Guide for Cisco NCS 5700 Series Fixed-Port Routers
23
Prepare for Installation
Airflow Directions
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