ThinkPad Essential Port Replicator

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ThinkPad Essential Port Replicator, Type 2505 (250510W)

This is a proprietary docking station for models with a CS05 standard docking port.



  • 1x PS/2 (Mini-DIN 6, keyboard+mouse) port
  • 4x USB 2.0 (Type-A) port
  • 1x Modem (RJ-11) port
  • 1x Ethernet (RJ-45) port
  • 1x VGA-out (DE-15) port
  • 1x DC-in (barrel) socket


  • 1x Kensington security lock slot


  1. Any model that is powered-on and attached to this docking station will shut down immediately, due to a stray electrostatic discharge that is caused by insufficient insulation. The solution to this problem, is to either turn off the laptop and dock it, or attach two rubber caps (FRU: 42W3219/42W3220) on two of the furthest 'EMI fingers' located on the docking station. More information regarding this problem can be found here.

Part numbers

with the conductive rubber caps

  • 42W4627 (42W4626), 42W4623 (42W4622), 42W4601 (42W4600)

without the conductive rubber caps

  • 41W6567 (41W6566), 41W6565 (41W6564), 26R9065 (26R9064)


This docking station is capable of accepting an 'extender' (FRU: 42W3365/42X4884) that seems to be meant for supported 14.1-inch widescreen models. The purpose of this extender is to function as a wrist-rest/palm-rest, as the 14.1-inch widescreen models do not have sufficient coverage to act as a wrist-rest/palm-rest.

Models supporting this accessory