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A900-IMA4OS
ASR 900 4 port OC3/STM1 or 1 port OC12/STM4 Interface Module
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
A900-IMA4OS is a modular enterprise router that features a robust architecture designed for high performance and scalability. It offers flexible power options including AC, DC, and redundant supplies, and provides dual WAN interfaces alongside multiple LAN ports to support diverse network topologies, ensuring reliable connectivity and seamless integration into existing infrastructures.
The device integrates advanced services such as voice, video, and WAN optimization with built-in VPN features including IPSec and SSL VPN for secure communications. With modular capabilities that allow for expansion via NIM and SFP+ slots, high throughput capacity of up to 10 Gbps, redundant systems for high availability, and optimized performance for enterprise use cases, the A900-IMA4OS meets the rigorous demands of modern network environments.
A900-IMA4OS price is $4,250.00, a 62.5% saving from the Cisco list price of $11,326.00. A900-IMA4OS is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for A900-IMA4OS for additional pricing. Browse the full Cisco Router Asr 900 series or explore all Cisco products.
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| A900-IMA4OS |  A900-IMA16D |  A900-IMA8T |  A903-CABLE-GUIDE |  A903-RSP1B-55 | |
|---|---|---|---|---|---|
| 5G Support | No | No | No | No | No |
| Architecture | Modular | Modular | Modular | Modular | Modular |
| Built-in Security Features | Firewall / Intrusion Prevention / Malware Protection | Firewall / Intrusion Prevention / Malware Protection | Firewall, Intrusion Prevention, Malware Protection | Firewall / Intrusion Prevention | Firewall, Intrusion Prevention, Malware Protection |
| Compliance Standards | FCC, CE, RoHS | FCC, CE, RoHS | FCC, CE, RoHS | CE, FCC, RoHS | CE, FCC |
| Connectivity Type | Wired | Wired | Wired | Wired | Wired |
| Depth | 18 inches | 18 inches | 16 inches | 18 inches | 18 inches |
| Device Type | Router | Router | Router | Router | Router |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Expansion Slots | NIM / SFP+ | NIM | NIM / SFP+ | NIM | SFP+ / NIM |
| Features | VPN / Firewall / IPv6 Compatible / WAN Optimization | VPN / IPv6 Compatible / Firewall | VPN, IPv6 Compatible, Firewall, MPLS, Syslog | VPN / IPv6 Compatible / Firewall / PoE | VPN, IPv6 Compatible, Firewall |
| Firewall Features | Yes | Yes | Yes | Yes | Yes |
| Flash Memory | 256 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Form Factor | Rack-mount | Chassis | Rack-mount | Rack-mount | Rack-mount |
| Height | 2 inches | 4 inches | 4 inches | 2 inches | 4 inches |
| High Availability Support | Supported | Supported | Supported | Supported | Supported |
| Integrated Services | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization | Voice, Video, WAN Optimization | Voice / Video / WAN Optimization | Voice, Video, WAN Optimization |
| Interface Ports | RJ-45 / SFP+ | RJ-45 / SFP | RJ-45, SFP | RJ-45 / SFP | RJ-45 / SFP / Combo Ports |
| LAN Ports | 4 LAN Ports | 8 LAN Ports | 8 LAN Ports | 8 LAN Ports | 4 LAN Ports |
| Management | Managed | Managed | Managed | Managed | Managed |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB | 4 GB |
| Modular Slots Available | 3+ Slots | 3+ Slots | 3+ Slots | 3+ Slots | 3+ Slots |
| Network Protocols | IPv4, IPv6, MPLS | IPv4, IPv6 | IPv4, IPv6, MPLS | IPv4, IPv6, TCP/IP | IPv4, IPv6, MPLS |
| Power | 350W | 150 W | 150W | 250 Watt | 350 Watt |
| Power Source | AC Power Supply / DC Power Supply / Redundant | AC Power Supply | AC Power Supply / DC Power Supply / Redundant | Redundant | AC Power Supply / Redundant |
| Product Name | A900-IMA4OS Enterprise Router | A900-IMA16D Enterprise Modular Router | A900-IMA8T Enterprise Modular Router | A903-CABLE-GUIDE Integrated Network Appliance | A903-RSP1B-55 Enterprise Router |
| Product Type | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router | Enterprise Router |
| QoS Features | Supported | Supported | Supported | Supported | Supported |
| Remote Management | SNMP, SSH, Telnet | SSH, SNMP, Telnet | SSH, HTTPS, SNMP | Telnet, SSH, SNMP | SSH, Telnet, SNMP |
| Routing Protocols | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / EIGRP / Static Routing | OSPF / BGP / Static Routing | OSPF / BGP / EIGRP / Static Routing |
| Speed/Capacity | Gigabit | Gigabit | Gigabit | Gigabit | Gigabit |
| Stacking Capability | Yes | Yes | Yes | Yes | Yes |
| Throughput Capacity | 10 Gbps | 10 Gbps | 10Gbps | 10 Gbps | 10 Gbps |
| Use Case | Enterprise | Enterprise | Enterprise | Enterprise | Enterprise |
| VPN Support | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN | IPSec / SSL VPN / GRE |
| WAN Configuration | Dual WAN | Dual WAN | Dual WAN | Dual WAN | Dual WAN |
| WAN Ports | 2 WAN | 2 WAN | 2 WAN | 2 WAN | 2 WAN |
| Weight | 15 lbs | 25 lbs | 15 lbs | 15 lbs | 25 lbs |
| Width | 19 inches | 18 inches | 17 inches | 17 inches | 17 inches |
| Wireless Support | No | No | No | Yes | No |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Versatile interface module. Switching between OC3 and OC12 is seamless, providing the flexibility we need for legacy transport integration on the ASR 900.
Excellent port density and reliability. This module has performed flawlessly, allowing us to maintain stable optical links in our aggregation network.
High-quality optical interface. It's been a reliable component for our legacy migration strategy. Easy to install and recognized immediately by the chassis.
Solid performance for SONET/SDH traffic. This A900 module provides the consistent throughput required for our high-speed optical backhaul. Very satisfied.
Dependable and robust. This module offers great flexibility for optical service delivery. It's a vital part of our ASR 900 hardware fleet.
The A900-IMA4OS is a Cisco ASR 900 series interface module providing four OC3/STM1 ports or one OC12/STM4 port for high-performance WAN connectivity.
It supports either four independent OC3/STM1 ports or a single OC12/STM4 port, selectable via onboard DIP switches.
The A900-IMA4OS is compatible with all Cisco ASR 900 series routers running IOS XR 5.1.1 or later.
No, the module operates in either four-port OC3/STM1 mode or one-port OC12/STM4 mode; both cannot run concurrently.
In OC3/STM1 mode it delivers up to 4×155 Mbps (620 Mbps total), and in OC12/STM4 mode it delivers up to 622 Mbps.
Power down the router, slide the module into an available FPI slot, fasten the captive screws, then power the router back on.
Yes, the A900-IMA4OS supports in-service insertion and removal under IOS XR without disrupting other interfaces.
Operating temperature 0–40 °C, storage –40–70 °C, relative humidity 5–85 % non-condensing, and altitude up to 3,000 m.
It supports POS, PPP, HDLC, ATM, and MPLS over OC3/STM1 or OC12/STM4 interfaces.
Use IOS XR CLI to define interface framing, clock source, encapsulation, and apply QoS policies per your network design.
Typical applications include metro aggregation, cell site backhaul, enterprise WAN links, and broadband service delivery.
Cisco offers a limited lifetime warranty and optional SMARTnet support for advanced hardware replacement and software updates.
Perform a Cisco IOS XR software upgrade via network or USB, which automatically updates the module’s onboard firmware.
The module draws power directly from the ASR 900 router backplane, consuming approximately 15 W under full load.
Use Cisco-approved single-mode fiber cables, OC3/STM1 or OC12/STM4 SFP optics, and an EIA-19 rack mounting kit for best results.
Products in stock ship within 1–3 business days; check with your reseller for real-time availability and expedited options.
Buy directly from Cisco’s online store or through authorized Cisco channel partners and value-added resellers.
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