Copy speed Multi-copy 28 ppm
Continuous copy (ADF) 17.8 ppm
Fax (DNF model only)
Supported communications lines PSTN (subscriber lines)
PBX (independent premises internal lines)
Communication speed 33600/ 31200/ 28800/ 26400/ 24000/ 21600/ 19200/ 16800/ 14400/
12000/ 9600/ 7200/ 4800/ 2400 bps
Protocol G3, G3ECM
Transmission and reception mode Transmits and receives 1 bit monochrome
Image compression method MH, MR, MMR
Transmission and reception of scanning line
density
8 × 15.4, 8 × 7.7. 8 × 3.85 dot/mm
Document size Document table
8.5 × 14 inch (Maximum paper size)
Auto Document Feeder A4, Letter, Legal
Print paper size A3, A4, B4, B5, Letter, Legal
Duplex Unit
Paper size: A4, Letter (LT)
Paper weight: 60 to 105 g/m (16 to 28 lb)
Paper feed: Automatic feed delivery system
Paper types: Plain paper
Environmental
Temperature: In use: 10 to 32.5˚C (50 to 90˚F)
Not in use: 0 to 35˚C (32 to 95˚F)
Epson AcuLaser MX21/MX20 Series User's Guide
Technical Specifications 276
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