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Cisco ASR 903 Router Hardware Installation Guide
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Cisco ASR 903 router Overview
The CiscoASR903router is a fully-featured aggregation platform designed for the cost-effective
delivery of converged mobile and business services. With shallow depth, low power consumption, and
an extended temperature range, this compact 3-rack-unit (RU) router provides high service scale, full
redundancy, and flexible hardware configuration.
The Cisco ASR 903 router expands the Cisco service provider product portfolio by providing a rich and
scalable feature set of Layer 2 VPN (L2VPN) and Layer 3 VPN (L3VPN) services in a compact package.
It also supports a variety of software features, including Carrier Ethernet features, Timing over Packet,
and pseudowire.
The Cisco ASR 903 router is positioned as a pre-aggregation router in IP RAN (GSM, UMTS, iMAX,
CDMA, and LTE) networks or an aggregation router in Carrier Ethernet networks.

Cisco ASR 903 router Features

The Cisco ASR 903 router has the following hardware features:
•3-RU modular chassis designed for installation in a 300 mm European Telecommunications
Standards Institute (ETSI) cabinet
•Dedicated slots in the chassis that support the following:
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Up to six interface modules
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Up to two Route Switch Processors (RSP)
–
Up to two DC power supply units
–
One fan tray
•Network frequency, phase, and time inputs and outputs for network interfaces (SyncE and TDM),
BITS, 1 PPS or 10 MHz and Timing over Packet (IEEE 1588-2008)
•Adjustable front and rear rail mounting locations
•Front panel access to power supplies, fan tray, RSPs, and interface modules
•Online insertion and removal (OIR) of RSP, interface modules, power supplies, and fan tray
•Discrete status LEDs on power supply, interface module, RSP, and fan tray units
•Four alarm dry contact inputs (either normally open or normally closed)
•Environmental monitoring and reporting functions
•LED indicators for critical, major, and minor alarms