Brother HL-7050N - Manual (Page 203)

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HL7050_US_UG_FM5.5
Options
Paper
handling Lower-tray unit (LT-7000)
Maximum 500 sheets x 3 trays
Duplex unit for duplex printing (DX-7000)
Mailbox unit for output source (MX-7000 series)
Stabilizer Stabilizer for safety after installing multiple optional devices on
the printer (SB-4000)
Network
connectivity Ethernet 10BaseT/100BaseTX Print server (NC-4100h)
(For HL-7050 only)
Storage
device Hard Disk Drive
CompactFlash Card