Latest drivers for this device can be found at the Oki.com a small cache of publicly available below.
OKI ESC/P Printer Driver
File: okiML300T700 WinXP_tcm3-174093_42812.zip
9c73f66ba756a08260924c21dbc7427dd115c0d5d20363ca15e9a8c07aefce93
OKI Microline 321 Turbo Plus User Manual
File: ML320T_PH_63082.pdf
ee0e93e8d1844fe16de17f70fee138973a97613abbedd185e444b34bf3557683
Printing Method: Serial Impact Dot Matrix Method
Print Head: 9 Pin
Dot Wire Diameter: 0.34 mm
Print Direction: Bidirectional/Unidirectional printing, Short line-seeking printing
Graphic Resolution: Max. 240(H) x 216(V) dpi
1. Extract the downloaded zip file.
2. Launch Add Printer Wizard.
3. When prompted for the Manufacturer and Model click on Have Disk.
4. Browse to the extracted location.
5. Click OK.
6. Follow the prompts to finish the driver installation.
Show: Full Specs/Additional configurations
Printing Method: Serial Impact Dot Matrix Method
Print Head: 9 Pin
Dot Wire Diameter: 0.34 mm
Print Direction: Bidirectional/Unidirectional printing, Short line-seeking printing
Graphic Resolution: Max. 240(H) x 216(V) dpi
Print Speed: Super Speed Draft : 435 cps, High Speed Draft : 387 cps, Utility : 290 cps, Near Letter Quality : 73 cps
Line Feed Pitch: 4.23mm (1/6 "), 3.18mm (1/8 "), n x 0.35mm(n/72 ") (n=1-85), n x 0.18mm(n/144 ") (n=0-255), n x 0.12mm(n/216 ") (n=0-255)
Feed Speed: 4.5 inches per second
Feed Rate: 4.23mm(1/6”) line feed: Approx. 48 milliseconds
Paper Route: Manual (Top), Tractor feeder (Rear), Tractor feeder (Bottom), Cut sheet feeder (Rear)
Character Pitch: Super Speed Draft : 12.0 cpi
High Speed Draft : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi
Utility : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi, Propotional
Near Letter Quality : 10.0 cpi, 12.0 cpi, 15.0 cpi, 17.1 cpi, 20.0 cpi, Propotional
Printing Width: 136 characters/line at ANK 10 cpi
Interface: IEEE1284-1994 Bi-directional Parallel, USB 2.0 (Full Speed), (Optional) 100BASE-TX/10BASE-T, (Optional) RS-232C (25pin)
Emulation: OKI Microline, ESC/P emulation, IBM ProPrinter emulation
Supported OS (Click here for latest OS)
Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 x64, Windows Server 2003, Windows Server 2003 x64
Receive Buffer: Max. 128KB
Resident Font: High Speed Draft, Utility, NLQ Courier, NLQ Gothic, Scalable Courier, Scalable Gothic
Font Style: Bold, Double Width, Double Height, Emphasized, Italics, Over score, Underline
1-D Barcode: UPC-A, UPC-E, EAN8, EAN13, Code39, Interleaved 2 of 5 (ITF), Code128, POSTNET, Codabar (NW-7), Industrial 2 of 5, Matrix 2 of 5
Paper Type: Continuous paper, Continuous copying paper, Cut sheet, Card, Envelope, Label
Paper Weight Adjustment: Manual
Paper Size: Continuous paper: Width 76.2-406.4mm x Length 76.2-355.6mm
Single part paper: Width 99.1-363.2mm x Length 99.1-356.0mm
Multi part paper: Width 76.2-406.4mm x Length 76.2-355.6mm
Paper Weight: Continuous paper : 45 - 90 gsm
Single part paper : 45 - 90 gsm
Multi part paper : 35 - 40 gsm
Copy Capability: Normal print mode: original + 4sheets(Total Thickness < 0.36mm)
Dimensions(WxDxH): 552 x 345 x 147 mm
Operating Environment: Operating: 5 - 35 °C, 20 - 80 %RH
Storage: -10 - 50 °C, 5 - 95 %RH
No condensation
Power Source: Single phase 220 - 240 VAC ±10%, 50/60 Hz ±2%
Power Consumption: Operating: Max. -W (ISO10561 (Utility, Range1) Printing Approx. 36W)
Power Save: < 1.7W
Noise Level: Operating :Approx. 57 dBA
Quiet Mode: < 52 dBA
MTBF(Mean Time Before Failure): 10,000 hours
Ribbon Life: Black : 3 million characters
Print Head Life: Approx. 450 million strokes/ pin
