Our take
The OKI C911dn is a print-only, full-color A3 machine that uses digital LED electrophotographic printing. OKI rates it up to 50 ppm on A4 and 28 ppm on A3, and its specifications describe standard duplex, Ethernet and USB. The larger paper path supports stock up to 360 gsm for simplex jobs and 320 gsm for duplex, distinguishing it from a conventional letter-size office printer. OKI's U.S. support page identifies part 62439901, while the detailed specification page does not provide a comparable recommended monthly range.
A workgroup or graphics office that needs color A3 output, heavier media and wired Ethernet rather than an all-in-one..
Choose another model if you need copy, scan or fax, built-in wireless, a compact desk printer, or a documented monthly workload range.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- A3 output and the broad media range suit business graphics that exceed ordinary Letter and Legal jobs.
- Standard duplex is documented, including support for heavier two-sided stock than many desk printers accept.
- Gigabit Ethernet and USB provide wired network and local interfaces for the exact printer family.
What to weigh up
- The C911dn is print-only and cannot handle copy, scan or fax tasks itself.
- OKI's reviewed sources do not state a recommended monthly volume for matching a routine queue.
- Wireless is not established by the cited interface list, and the large format design needs space and planned supplies.
The key details
| Model covered | C911dn (U.S. part 62439901) |
|---|---|
| Main functions | Color LED electrophotographic print only |
| Print output | Up to 50 ppm A4 or 28 ppm A3 |
| Two-sided printing | Standard duplex; Ethernet and USB; media up to 360 gsm simplex |
Performance figures are manufacturer claims. Source checked October 8, 2026. Regional models and included accessories can differ.
What the features mean for you
A3 output changes the kind of work it can serve
OKI describes the C911dn as a full-color A3 printer for office printing and graphics work. Its supported media includes sizes through SRA3 and long banners, which opens uses such as larger forms, diagrams and marketing pieces that a letter-size desktop model cannot cover. The printer remains single-function: copy, scan and fax are not listed. If the output is only routine Letter pages, the extra size and media path may not help. Choose this format capability only when the planned documents actually use it.
Speed varies with the paper size
OKI's specification gives up to 50 ppm color or monochrome on A4 and up to 28 ppm on A3. That size distinction is important for a buyer comparing the headline figure with large-format work. The manufacturer also specifies standard duplex printing. Two-sided output on A3 or heavier stock is a different job from short single-sided Letter pages, and the rating should not be read as a measured result for every media type. Confirm the installed duplex unit and its operation on the offered device.
Heavy stock and specialty media are a real differentiator
The C911dn specification supports media up to 360 gsm for one-sided printing and up to 320 gsm for duplex, along with a wide range of paper formats. This can matter to a graphics or production team using card stock, glossy media or larger sheets. It also raises the value of careful setup: paper selection, profile settings and the exact stock must follow the manufacturer guidance. The printer's flexibility is a trade-off against its footprint and supply handling, and does not tell us how a particular used unit handles its remaining media path.
Ethernet and USB are documented; Wi-Fi is not
The detailed C911dn specification lists 1000BASE-T, 100BASE-TX, 10BASE-T and USB 2.0. These provide a wired network path and a direct local connection. The source does not establish built-in wireless, so the reviewed matching profile leaves that value unknown rather than assuming the model can join Wi-Fi. For a fixed office installation, Ethernet is the more clearly documented choice. Check network policy and the exact configuration before buying, especially if the printer will sit outside a wired area.
Plan around the workload facts that remain unknown
OKI provides detailed speed, media and interface specifications, and its U.S. support portal identifies part 62439901 for the C911dn. The reviewed manufacturer material does not publish a recommended monthly page range, so this comparison cannot rank it by the finder's workload preferences. Do not substitute a maximum duty-cycle figure or infer a suitable monthly target from the speed rating. Before choosing a large-format printer, verify the exact model label, installed trays, consumables, service state and whether the office has the space and compatible stock the printer needs.
What else to compare
Compare a smaller color printer if Letter output is enough, or a color MFP if copying and scanning need to stay near the print queue.
Before you buy
Is the C911dn a color printer?
Yes. OKI documents the C911dn as a full-color LED electrophotographic printer with A4 and A3 color speeds.
Does it print on both sides automatically?
The OKI specification describes duplex printing as standard on the C911dn.
What monthly volume does OKI recommend?
The reviewed manufacturer sources do not establish a recommended monthly page range for this exact product.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- OKI U.S. support page for C911dn part 62439901 ↗ — checked October 8, 2026.
- OKI U.S. support page matching part 62439901 to C911dn ↗ — checked October 8, 2026.
- OKI manufacturer specifications for C911dn speed, media, duplex and interfaces ↗ — checked October 8, 2026.
- OKI C911dn media capacity and standard duplex details ↗ — checked October 8, 2026.
The decision
Choose the C911dn for its documented A3 color output, duplex and heavy-media capability when those features serve a real office workflow. Its large print-only design and unknown monthly recommendation limit broader comparisons.
Is it the right fit?
Check the exact model and today’s offers on Amazon.