Cisco C819HG-4G-G-K9 vs IR1101-K9
The C819HG-4G-G-K9 is an end-of-life hardened ISR G2 with a fixed 4G LTE radio; its modern Cisco replacement is the Catalyst IR1101 (IR1101-K9), a modular rugged router that runs IOS XE, supports field-swappable 4G/5G modules, and is FirstNet Capable. For new industrial and IoT WAN edge sites, migrate to the IR1101.
Cisco 819HG Hardened ISR
End-of-life hardened ISR G2 with a fixed, region-locked 4G LTE modem for M2M and outdoor cabinets.
- Compact hardened metal chassis for shock, vibration, and dust
- Integrated 4G LTE (region/band fixed at order time, no upgrade path)
- Runs classic IOS 15.x; no native IOS XE SD-WAN
- End of sale and approaching/past Last Day of Support
Cisco Catalyst IR1101
Current modular rugged industrial router with swappable cellular modules and IOS XE.
- Pluggable Interface Modules for 4G LTE or 5G Sub-6, swappable in the field
- Dual-cellular option for WAN redundancy and load balancing
- Runs IOS XE with Catalyst SD-WAN, edge compute, and IOx app hosting
- FirstNet Capable; -40 to 60 C operating range and 9.6-60V DC input
Cisco 819HG Hardened ISR vs Cisco Catalyst IR1101: spec comparison
| Spec | Cisco 819HG Hardened ISR | Cisco Catalyst IR1101 |
|---|---|---|
| Class | Hardened ISR G2 | Modular rugged ISR (Catalyst IoT) |
| Cellular | Fixed 4G LTE (band-locked) | Pluggable 4G LTE or 5G Sub-6, swappable |
| Dual SIM / dual modem | Single fixed modem | Up to 2 cellular PIMs (dual modem) |
| Operating system | Cisco IOS 15.x | Cisco IOS XE 17.x |
| SD-WAN | No native IOS XE SD-WAN | Native Catalyst SD-WAN (IOS XE) |
| Ethernet | Gigabit Ethernet WAN + 4-port LAN | 4 x GE LAN + WAN/combo uplink |
| Edge compute / IOx | Limited | Yes, IOx application hosting |
| Power input | DC, hardened | 9.6 to 60V DC integrated |
| Operating temperature | Approx. -25 to 60 C | -40 to 60 C (to 75 C w/ airflow) |
| FirstNet Capable | No | Yes |
| Lifecycle status | End of Life | Current, actively sold |
Choose Cisco 819HG Hardened ISR if
Only keep the C819HG in service for an existing M2M site that is stable and scheduled for retirement; it is not a valid choice for new builds because the radio cannot be upgraded and software support is ending.
Choose Cisco Catalyst IR1101 if
Choose the IR1101-K9 for new industrial, utility, transportation, and IoT WAN edge sites that need swappable 4G/5G, dual-cellular redundancy, SD-WAN, edge compute, and a long-term support runway.
Verdict
The C819HG's fixed, band-locked LTE radio and classic IOS make it a dead end as carriers retire legacy bands and Cisco winds down support. The IR1101 is the direct rugged successor and decouples the radio from the router via swappable 4G/5G PIMs, adds dual-cellular failover, IOS XE SD-WAN, and edge compute. Migrate to the IR1101-K9 for any deployment expected to live past a 3G/legacy-LTE sunset.
Frequently asked questions
Why replace the Cisco 819HG hardened router?
The 819HG (C819HG-4G-G-K9) has a fixed cellular radio that cannot be upgraded as carriers sunset older bands, and it runs classic IOS that no longer receives long-term feature and security updates. The Catalyst IR1101 fixes both with swappable modules and IOS XE.
Can the IR1101 do 5G?
Yes. The IR1101 accepts 5G Sub-6 Pluggable Interface Modules (for example P-5GS6-GL), and because the modems are modular you can start on 4G LTE and field-upgrade to 5G later without replacing the router.
Does the IR1101 support dual cellular for failover?
Yes. The IR1101 can be provisioned with two cellular modules for concurrent connectivity to two networks, enabling WAN redundancy, load balancing, and higher aggregate throughput.
Is the IR1101 suitable for U.S. federal and public-safety use?
The IR1101 is FirstNet Capable and is available in TAA-compliant configurations for federal buyers. Confirm the specific TAA SKU and country of origin on your quote with your authorized partner.
More ISR comparisons
Specs are for planning and may change; Uniqcli confirms the current Cisco bill of materials and pricing on your quote. Cisco, Catalyst, Nexus, Meraki, and Firepower are trademarks of Cisco Systems, Inc.; Uniqcli LLC is an independent authorized Cisco partner.