Netopia Firmware Compatibility Browser

The Serial Port — Community firmware archive for Netopia DSL routers, gateways & switches
About Netopia Routers & This Archive

Netopia (originally Cayman Systems, later acquired by Motorola in 2007) made a wide range of DSL routers and gateways from the late 1990s through the mid-2000s. Their products were widely deployed by ISPs including AT&T, BellSouth, SBC, Covad, EarthLink, and Belgacom. Today these devices are popular with vintage computing and retro networking enthusiasts.

This page catalogs 45 firmware images spanning multiple hardware generations and lets you look up which firmware files are compatible with your specific Netopia model. Select your model from the dropdown to see all compatible firmware versions, or browse the full archive. Click any firmware card to expand full details including CPU architecture, RTOS, ISP branding, and the complete model compatibility list.

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Firmware Prefix Guide

n
Enterprise Series — 33xx-ENT models, 4xxx-series. Standard full-feature firmware with web management UI.
nl
Consumer / "Lite" Series — 33xx non-ENT, 3347NWG-VGx, 46xx-series. Simplified consumer-oriented firmware.
nir
R-Series — R3100, R7100, R7200, R9100, R9160 and some 33xx ADSL models. Also covers Enterprise R-910 at 8.x firmware.
nta
Telco-A (SBC / AT&T) — MIPS-based "N" suffix models (3341N, 3346N, etc.) built for SBC/AT&T deployment.
ntb
Telco-B (Belgacom) — MIPS-based models built for European Belgacom deployment. Includes 22xxN and 57xxNWG series.

Hardware Generations & CPU Architectures

Motorola 68K
Earliest generation (Cayman-era). VRTX RTOS. Found in R-series firmware v4.x. LZS compression.
PowerPC MPC860
Second generation. ThreadX RTOS. R-series firmware v5.x. Supports SDSL, SHDSL, ISDN, IDSL, ADSL, T1 WAN types.
ARM9
Third generation. ThreadX RTOS. Most 33xx-series ADSL gateways. Firmware v7.x–8.x. zlib-compressed payload.
MIPS IDT32xxx
ISP-deployed models. ThreadX RTOS. "N" suffix models (3341N, 3346N, etc.) for SBC/AT&T and Belgacom.

R-Series: Generic Firmware

R-series routers (R3100, R5300-T, R7100, R7100-C, R7200, R9100, R9160) use generic firmware with no model table compiled in. The hardware self-identifies at boot via on-board configuration, and the same firmware binary runs on all R-series hardware. This means any nir-prefixed firmware in the 4.x–5.x version range should work across all R-series models. The router detects its own model number, WAN type (SDSL, SHDSL, ISDN, IDSL, ADSL, or T1), and board revision from hardware at startup.
Later nir firmware in the 7.x–8.x range switched to ARM9 and includes a model table listing specific 33xx ADSL models plus the R910. These are shared firmware images covering both the R-series and 33xx platforms.

Version Numbering

Firmware versions are encoded in the filename, but the scheme changed between generations. v5.x and later use three-part versioning: n850.bin = v8.5.0, nir539R6.bin = v5.3.9 R6 (first digit = major, second = minor, third = patch). v4.x (68K era) uses two-digit minor versions: nir411.bin = v4.11, nir4113.bin = v4.11.3. "R" followed by a number indicates a revision/hotfix release. Higher revision numbers within the same version are generally recommended over lower ones.