Cisco ASR 903 Installation Guide

Figure 57: Securing the Side Plate
——Securing side plate to plenum base1
Step 3 Repeat Step-1 and Step-2 to complete the plenum assembly on the other side of the plenum base.
Step 4 Position the air filter (A903-F2B-AIR-F) assembly on the plenum deflector. Secure the front cover using a recommended
torque of 11.5 in.-lb (1.3 N-m). See figure below.
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
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Installing the Cisco ASR 903 Router
Installing Plenum A903-F2B-AIR-U Assembly and Chassis in the Rack

Cisco ASR 903 Specifications

General

Form Factor	Modular
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5% to 95% non-condensing
Redundancy	Yes, redundant power supplies and route processors
Operating System	Cisco IOS XE
Power Supply	AC or DC
Switching Capacity	240 Gbps
Operating Temperature	-40°C to 65°C (-40°F to 149°F)
MTBF	200, 000 hours
Supported Protocols	IPv4, IPv6, MPLS, L2VPN, L3VPN
Interfaces	Gigabit Ethernet, 10 Gigabit Ethernet, T1/E1