Full English Description for Cisco ASR 901 Series

1. Official Short Order Description (Datasheet Standard Format)

ASR 901: Cisco ASR 901 Series 1RU Hardened Compact Cell-Site Aggregation Services Router, low-power fan-redundant chassis designed for multi-generation 2G/3G/4G/LTE RAN backhaul, split into TDM-equipped (FT-D) and pure Ethernet (F-D) hardware variants, flexible mixed port configurations with T1/E1 channelized trunk, copper GE and SFP fiber interfaces, comprehensive multi-standard timing subsystem (BITS, 10MHz/1PPS, ToD, SyncE, IEEE 1588v2 PTP), dual redundant -48VDC power feeds, wide extended operating temperature (-40°C ~ +65°C), runs Cisco IOS 15.xS software with full Carrier Ethernet, MPLS L2/L3VPN, TDM over IP (SAToP/CESoP), hardware IPsec security and hierarchical mobile transport QoS, ideal for macro/small cell edge backhaul, microwave aggregation, utility remote site and compact Ethernet access aggregation deploymentsCisco.

2. Complete Detailed Product Overview

Product Line Positioning

Cisco ASR 901 is a compact 1RU hardened cell-site gateway within the ASR 900 mobile transport family, distinct from larger 3RU modular ASR 903 and high-capacity IOS XR ASR 9000 core routers. It delivers converged TDM and Ethernet transport for multi-vendor multi-generation radio base stations (BTS, NodeB, eNodeB) with ultra-wide temperature tolerance and low power draw, optimized for remote cell huts, pole-mounted cabinets and roadside equipment enclosures. Two core hardware families are available: TDM versions with built-in T1/E1 ports for legacy circuit migration, and Ethernet-only models for all-IP modern RAN deployments, supporting pay-as-you-grow software licensing for throughput, timing and security featuresCisco.

Hardware Model & Interface Layout

Main Product Variants

TDM Models (A901-xxC-FT-D): Integrated 12-port / 4-port T1/E1 RJ45 channelized trunk ports for legacy voice/signaling transport
Ethernet-Only Models (A901-xxC-F-D): No native TDM ports, pure GE copper/SFP fiber for all-IP backhaul

Fixed Ethernet Port Combinations (Model-Dependent)

4× fixed 10/100/1000BASE-T RJ45 copper GE ports
4× dedicated SFP-only Gigabit fiber slots
4× combo SFP/RJ45 dual-mode GE ports (switchable copper/fiber)

All Ethernet ports support IEEE 802.1Q VLAN, MACsec hardware encryption, SyncE timing offload and wire-speed QoS processingCisco.

Integrated Timing Interfaces (Critical for Mobile Transport)

RJ45 BITS timing port for Stratum 3 network clock synchronization
RJ45 ToD (Time of Day) port for GPS timing messaging
Dual mini-coax connectors: 10 MHz clock output/input + 1 PPS pulse for external GNSS receivers

Full compliance with IEEE 1588v2 PTP grandmaster/slave, SyncE and TDM clock recovery for 3GPP mobile fronthaul/backhaul timing requirementsCisco.

Management, Alarm & Auxiliary Interfaces

RJ45 serial console port for local out-of-band configuration
1×10/100BASE-T out-of-band management Ethernet port
4 isolated digital alarm input terminals for environmental monitoring and equipment fault alerts
Front-panel multi-color LED indicators for power, fan, port link, timing lock and system critical faultsCisco.

Processor, Memory & Storage

Fixed integrated forwarding ASIC with line-rate L2/L3 processing, native hardware offload for SAToP/CESoP TDM pseudowires, IPsec VPN, NAT and multicast replication
Default memory: 2GB DRAM, sufficient for thousands of pseudowires, VPN tunnels and mobile transport QoS queues
Onboard 1GB industrial solid-state flash for IOS boot images, crash dumps and persistent system logging; no expandable SSD/HDD bay supportedCisco.

Power, Mechanical & Environmental Specifications

Form Factor: Standard 1RU 19-inch / ETSI rack-mount chassis; dimensions 43.7mm H × 442mm W × 210mm D, weight ~3.1kg
Cooling: Dual redundant hot-swappable internal fans with side-to-side airflow, zero-downtime fan replacement without chassis power down
Power Architecture: Dual redundant -48VDC telecom DC input feeds for carrier-grade power resilience; low idle power consumption under 20W
Operating Temperature: -40°C to +65°C continuous operation, designed for unheated remote cell-site cabinets
Storage Temperature: -40°C ~ +70°C
Humidity: 5%–95% RH non-condensing operating humidity
Compliance: UL 60950-1, NEBS GR-1089, FCC Class A, CE certified for telecom cell site and industrial remote site deploymentCisco.

Official Performance Benchmarks

Wire-speed full Gigabit Ethernet line-rate forwarding capacity
Maximum concurrent TDM pseudowires (SAToP/CESoP): Up to 1,000 tunnels
Hardware-accelerated IPsec VPN throughput: Up to 500 Mbps IMIX traffic
Supported MPLS L2VPN / EVPN VPLS instances: Up to 2,000
Full hardware offload for mobile transport features: TDM over IP, hierarchical MQC QoS, MACsec link encryption, NAT/NAPT and BFD fast convergence

Software & Core Supported Capabilities (Cisco IOS 15.xS)

Converged TDM + All-IP Mobile RAN Transport Suite

SAToP, CESoP TDM pseudowire encapsulation for legacy T1/E1 migration; full 3GPP-compliant IP RAN transport for 2G/3G/4G LTE voice, data and control signaling over microwave, fiber, DSL and WiMAX backhaul linksCisco.
Carrier-Grade MPLS & Layer 2 Ethernet Services

IPv4/IPv6 dual-stack forwarding, BGP, OSPF, IS-IS, BFD fast convergence; MPLS L3VPN, EVPN, VPLS, EVC Carrier Ethernet service delivery for multi-tenant operator transport networks.
Mobile Transport Precision Timing Stack

Native SyncE, IEEE 1588v2 PTP, BITS, 10MHz/1PPS GNSS timing integration to eliminate clock drift for synchronous mobile radio traffic transmission.
Integrated Mobile Security Suite

Hardware-accelerated IPsec tunnel encryption, MACsec fiber link security, NAPT large-scale subscriber address translation, AAA RADIUS/TACACS+, TLS encrypted remote management for secure cell-site access over public backhaul networks.
Hierarchical Mobile QoS & Traffic Visibility

NBAR2 application classification, multi-level MQC traffic shaping/policing, strict priority queues for mobile voice and signaling, IP SLA performance monitoring, NetFlow export for transport network capacity planning.
Carrier-Grade High Availability Mechanisms

NSF Nonstop Forwarding, ISSU In-Service Software Upgrade, HSRP gateway redundancy, sub-second BFD link failure detection, dual power/fan redundancy for remote unmanned cell sites.
Automation & Programmability

CLI/SSH access, NETCONF/YANG data models, SNMP MIB support, compatible with Cisco IoT Field Network Director and NSO for mass cell-site zero-touch provisioning.

Typical Deployment Scenarios

Macro and small cell 4G/LTE cell-site edge backhaul gateways, microwave aggregation nodes converging TDM and Ethernet radio traffic, rural utility remote substation FAN aggregation, compact Carrier Ethernet access aggregation for enterprise branch, roadside intelligent transportation system remote connectivity, multi-vendor BTS/NodeB/eNodeB converged transport migration sites requiring wide-temperature hardened hardware and integrated mobile timing synchronization.

3. E-commerce Short Marketing Description

Cisco ASR 901 Series 1RU Hardened Cell-Site Aggregation Router, low-power redundant fan/DC power design, split TDM and pure Ethernet hardware variants with flexible T1/E1, copper GE and SFP fiber ports, comprehensive BITS/PTP/SyncE multi-standard timing subsystem, -40°C ~ +65°C extended wide temperature range, Cisco IOS 15.xS OS with TDM over IP pseudowire, MPLS L2/L3VPN and hardware IPsec security, optimized for multi-generation 2G/3G/4G LTE RAN backhaul, microwave aggregation and remote industrial/utility site deployments.

4. Product Catalog Keyword Tags

Cisco, ASR 901 Series, 1RU Hardened Cell-Site Aggregation Router, Mobile RAN Backhaul Gateway, TDM + Ethernet Converged Transport, SAToP/CESoP Pseudowire Support, Integrated BITS / IEEE 1588v2 PTP / SyncE Timing, Redundant DC Power & Fans, -40°C to +65°C Wide Operating Temperature, NEBS GR-1089 Certified, Cisco IOS 15.xS, MPLS EVPN/VPLS Carrier Ethernet, Hardware IPsec Acceleration, Macro/Small Cell Edge Backhaul, Microwave Aggregation Gateway, Remote Utility Substation FAN Router

Naming Rule Explanation

ASR = Aggregation Services Router carrier-grade aggregation transport platform
901 = Compact 1RU hardened cell-site mobile transport variant of ASR 900 mobile series
FT-D suffix = TDM model with integrated T1/E1 trunk ports
F-D suffix = Ethernet-only model without native TDM interfaces


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