Model assessment · OKI

OKI B721dn review

An earlier wired monochrome LED printer with Legal duplex, 630-sheet input and compatible Windows memory-based PIN release.

Sources checked 2026-10-21 · Our editorial approach

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B721dn (62442001, 120V)Illustrated overview
A useful fit for

A compatible wired Windows workgroup making monochrome documents within the maker’s 3000–20000-page recommended monthly interval.

The main tradeoff

Wireless is a special-order edition, XPS and Mac do not share its Secure Print workflow, and expanded capacity and B731 supplies are separate.

Your needs, this model

Does it fit your priorities?

Can compatible wired Windows B721dn combine Legal duplex, PIN-held jobs and 630-sheet included input for a 15000-page monthly routine?

Yes. The actual PCL/PS plan supports Legal duplex and memory-based Secure Print; both included sources accept Legal. Fifteen thousand pages sits within the maker’s 3000–20000 recommended interval.

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Does maximum duty establish a recommended 30000-page monthly workload?

No. The exact B721dn recommended maximum is 20000. Its 250000 maximum duty and B731’s larger recommended range are separate figures.

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Does the ordinary 62442001 include the wireless model’s network connection?

No. The Americas brochure identifies wireless as a separately ordered model. Ordinary included routes are USB and Ethernet.

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Its recommended workload is a useful separate number

The OKI B721dn is a monochrome LED printer for a compatible wired workgroup. The original Americas brochure recommends 3,000–20,000 pages per month for this model. Its much higher 250,000-page monthly maximum duty is a different declaration and should not replace that recommended interval.

The neighboring B731dn has different speed and workload figures. The actual B721 specification gives 49 pages per minute for Letter simplex and 47 for A4 simplex. Duplex output is separately described in images per minute. These are maker declarations, not independent performance measurements.

Legal duplex and capacity share an actual paper route

The included cassette holds 530 suitable ordinary sheets and the multipurpose source adds 100. Both actual operating lists name Letter, Legal and A4. The printer therefore has documented 630-sheet input for those sizes without adding a cassette.

The operating capacity table specifies paper below 80 gsm, while a later summary uses an 80 gsm basis. Follow the narrower loading condition and stack-height marks. The broad total does not apply unchanged to thick stock.

Actual driver instructions provide long-edge or short-edge automatic duplex on the named ordinary sizes at 64–220 gsm. Envelopes, index cards, A6 and banners are excluded. The multipurpose source's heavier one-sided allowance does not extend the duplex material limit.

Password-held printing can use included memory

The advanced manual provides a Windows PCL and PostScript Secure Print workflow. A user supplies a job name and PIN in the driver, sends the job, then enters that PIN at the machine before printing. Its storage note refers to memory or an installed hard disk; it does not require buying the optional disk first.

Windows XPS and Mac PostScript are explicitly excluded from this feature. A shared printer or driver installation must therefore retain the supported route. Memory shortage can also invalidate held data, so confidential output is not an unlimited archive.

This is a genuine held-job procedure, separate from an administrator password or the WPS PIN used by a wireless-equipped version. Those other codes should not be presented as confidential document release.

The ordinary edition is wired

The exact Americas brochure maps B721dn part 62442001 to 120 V and includes USB and Gigabit Ethernet. Wireless and parallel models are available by special order. Their connection instructions in a shared manual do not put those interfaces into every ordinary unit.

A linked generic AirPrint guide says it applies only to devices that support AirPrint and uses another printer as its example. That conditional document alone does not establish exact B721dn native mobile support here. Verify an intended driver and computer before relying on this earlier printer.

Expansion and replacement cartridges have model limits

Extra 530-sheet trays and a large-capacity feeder are optional. The advertised maximum input counts an expanded arrangement rather than the included 630-sheet machine. Installed options also need the appropriate driver device settings.

The B721dn supports the declared 18,000- and 25,000-page print cartridges. The family's 36,000-page cartridge is specifically B731-only. The starter is declared at 10,000 pages, so neither neighboring cartridge capacity nor replacement yield should be treated as its out-of-box supply.

It remains a substantial print-only unit

The B721 uses a one-piece print cartridge, unlike the split supplies described for ES/MPS siblings. Its actual loaded weight is 26.6 kg, and the guide calls for two-person lifting. Allow extra room for trays, rear output, ventilation and service beyond the closed body dimensions.

There is no integrated document scanner, glass, feeder, copier or fax. Choose this model for the documented monochrome printing workflow, with its paper, driver and configuration limits checked together.

Key details at a glance

Color printingNo
ScannerNo
CopyingNo
FaxNo
Flatbed scannerNo
Automatic document feederNo
Automatic two-sided printingYes
Automatic two-sided scanningNo
Single-pass two-sided scanningNo
Color scanningNo
Instructed envelope handlingYes
Supported PIN-release printingYes
Recommended monthly minimum3000 pages
Recommended monthly maximum20000 pages
Maximum monthly duty250000 pages
Included ordinary-paper capacity630 sheets
Declared one-sided mono Letter rate49 pages/min
Unit-body width17.13 in
Unit-body depth19.61 in
Unit-body height16.14 in
Unit weight58.64 lb
Imaging engineled

Use the exact model’s instructions for operating limits, supplied equipment and version differences.

Paper, software and setup details

Print-rate conditions

The exact B721 column specifies 49 ppm Letter simplex, separately from 47 ppm A4 simplex and the brochure 40 ipm duplex declaration. B731 55 ppm is excluded. Americas recommended volume is 3000–20000 pages/month, distinct from B721 maximum duty of 250000.

Paper handling

Included 530-sheet cassette plus 100-sheet multipurpose source support Letter, Legal and A4 individually. Operating capacity table says suitable paper below 80 gsm; later summary says 80 gsm. Use the narrower loading condition. Actual desktop duplex supports these sizes at 64–220 gsm. A6, envelopes, index cards and banners are excluded from duplex; the multipurpose one-sided limit reaches 253 gsm under separate conditions. Extra trays and 2000-sheet feeder are optional.

Scanning arrangement

The exact B721dn is a monochrome LED print-only device, without a scanner, glass, feeder, copying or fax. A shared manual with other print models does not establish multifunction hardware.

Computer and mobile connections

USB 2.0 and Gigabit Ethernet are included. Wireless and parallel models are available by special order, so ordinary 62442001 is treated as wired. The linked generic AirPrint manual is conditional on supporting devices and uses MC562 as its example; it does not independently establish exact B721dn support.

Supplies and declared yields

Exact B721dn supports 18000- and 25000-page print cartridges under ISO/IEC 19752 declarations, with a 10000-page starter. The 36000-page cartridge is explicitly B731-only. B721/B731 use a one-piece print cartridge, while ES7131/MPS5501b have a different split supply arrangement.

Software and support

Actual Windows PCL/PS Secure Print holds jobs in memory or an installed hard disk until PIN entry, without requiring the optional hard disk. XPS and Mac PS are explicitly excluded. Included PIN-capable plan therefore uses compatible Windows PCL/PS only. Insufficient memory can invalidate held data. Actual desktop duplex provides long-/short-edge binding.

Electrical edition and setup

The original Americas brochure maps B721dn 62442001 to 120 V. Actual setup gives body 435 × 498 × 410 mm and 26.6 kg including consumables for B721/B731, distinct from 27.2 kg ES/MPS versions. Two-person lifting and room for rear output, tray extension, ventilation and service apply.

Sources for this assessment

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