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Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
OL-23778-01
Chapter 1 Introduction
Environmental Monitoring Temperature Sensor
Environmental Monitoring Temperature Sensor
The Cisco ASR 901 router has a temperature sensor to detect overtemperature conditions inside the
chassis. The overtemperature detection trips at 70°C. This condition is reported to the processor as an
interrupt, where the software generates the appropriate alarms. If the router reaches a temperature of
85°C, the power supply cycles itself to prevent the router from exceeding the maximum temperature
while being powered up.
System Specifications
Table 1-3 lists the system specifications for the Cisco ASR 901 router.
Router Interface Numbering
Each network interface on a Cisco ASR 901 router is identified by a slot number and a port number,
explained in this sequence:
• Logical slot numbers starts from 0 for all built-in interfaces. The numbering format is Interface
type Slot number/Interface number.
Interface (port) numbers begin at logical 0 for each interface
type.
• Logical interface numbering for T1/E1 ports on the TDM interface module runs from 0/0 through
0/15. Ports are numbered bottom to top, left to right.
• Logical interface numbering for the built-in ethernet ports runs from g0/0 through g0/3, the combo
ports run from g0/4 to g0/7 and the SFP ports run from g0/8 through g0/11. The GE ports are
numbered bottom to top, left to right.
Table 1-3 Cisco ASR 901 Router System Specifications
Description Specification
Dimensions (H x W x D) 1.7 x 17.4 x 8.25 in. (4.37 cm x 44.2 cm x 21.0 cm) 1 RU (rack unit)
in a 19-inch (48.3
cm) rack
Weight 3.1 Kgs (7 pounds)
Console and Auxiliary ports RJ-45 connector
Operating Temperature Operating temperature range is -40°C to +65°C (-40 to+149°F)
Non-Operational Temperature Temperature: -40 to 70 degrees C (-40 to 21.1 F)
Operating Humidity 10 to 90% RH (non-condensing)
Non-Operational Humidity Upto 93% RH
Operating Altitude 13,800 ft. (4206 m)
Operating Vibration 0.15 G, 10 to 500 Hz/100 minutes per axis
Non-Operational Vibration 0.8 G, 10 to 500 Hz/30 minutes per axis
Operating Acoustics 60 db
Air Flow Side to side