Serial Port

Most older ThinkPads have a Male DB-9 RS232 Serial Port, capable of running up to 115,200bps

Current ThinkPads no longer have a physical serial port, but still have the logic integrated, all that is required is to attach the ThinkPad to a supported Dock or Port Replicator with a serial port.

ThinkPads produced from 1994 onwards have a NS16550A compatible uart.

• Wikipedia article on Serial Port
• Wikipedia article on UART

Models featuring this Technology

Legacy UART

• ThinkPad 220
• ThinkPad 300
• ThinkPad 350, 350C
• ThinkPad 355, 355C, 355CS
• ThinkPad 360, 360CS, 360C, 360P, 360PE
• ThinkPad 500 (via port extension cable)
• ThinkPad 510CS
• ThinkPad 550BJ
• ThinkPad 700, 700C
• ThinkPad 710T
• ThinkPad 720, 720C
• ThinkPad 750, 750CS, 750C, 750P

16550A compatible UART

• ThinkPad 240, 240X
• ThinkPad 310, 310D, 310E, 310ED
• ThinkPad 345C, 345CS
• ThinkPad 365CS, 365C, 365CSD, 365CD, 365E, 365ED, 365X, 365XD
• ThinkPad 380, 380D, 380E, 380ED, 380XD, 380Z
• ThinkPad 385D, 385ED, 385XD
• ThinkPad 390, 390E, 390X
• ThinkPad 560, 560E, 560X, 560Z
• ThinkPad 570, 570E
• ThinkPad 600, 600E, 600X
• ThinkPad 701C, 701CS
• ThinkPad 755C, 755CS, 755CSE, 755CE, 755CX, 755CV, 755CD, 755CDV
• ThinkPad 760C, 760CD, 760EL, 760ELD, 760E, 760ED, 760L, 760LD, 760XL, 760XD
• ThinkPad 765L, 765D
• ThinkPad 770, 770E, 770ED, 770X, 770Z
• ThinkPad 820, 850, 860
• ThinkPad A20m, A20p, A21e, A21m, A21p, A22e, A22m, A22p, A30, A30p, A31, A31p, A275, A285, A475, A485
• ThinkPad i Series 1410, i Series 1411, i Series 1412, i Series 1420, i Series 1421, i Series 1422, i Series 1441, i Series 1442, i Series 1450, i Series 1451, i Series 1452, i Series 1460, i Series 1472, i Series 1482, i Series 1483, i Series 1492, i Series 1512, i Series 1552, i Series 1540, i Series 1541, i Series 1542, i Series 1560, i Series 1562, i Series 1592, i Series 1720, i Series 1721
• ThinkPad T20, T21, T22, T23, T30

16550B compatible UART

• ThinkPad 360CSE, 360CE
• ThinkPad 370C

Docks and Port Replicators featuring this Technology

NOTE!

These devices only feature pass-through functionality, the actual Serial port logic needs to reside in the ThinkPad for the port to work

• ThinkPad Port Replicator
• ThinkPad Port Replicator II
• ThinkPad Dock
• ThinkPad Dock II
• ThinkPad Advanced Dock
• ThinkPad Advanced Mini Dock
• ThinkPad Mini-Dock
• ThinkPad X4 Dock
• UltraBase X2
• UltraBase X3
• UltraBase X4
• UltraBase X6
• ThinkPad 365 Port Replicator
• ThinkPad 365X Port Replicator
• ThinkPad 380/385 Port Replicator
• ThinkPad 560 Port Replicator
• ThinkPad Enhanced Port Replicator
• ThinkPad Port Replicator with Advanced EtherJet
• SelectaBase Model I
• SelectaBase 600
• SelectaBase 770
• ThinkPad MultiPort
• ThinkPad MultiPort II
• ThinkPad Dock I (3545)
• ThinkPad Dock II (3546)
• ThinkPad Port Replicator Model 1
• ThinkPad Port Replicator Model 2

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