Lenovo ThinkPad i Series 1157 ThinkPad 570 User's Reference - Page 140

Extending features: Port Replicator with Advanced EtherJet Feature and Direct Dock Adapter Docking to or undocking from the Port Replicator with Advanced EtherJet Feature You can hot- or warm-dock or -undock your computer to or from the port replicator through Direct Dock Adapter under the following conditions: With your computer powered off (cold docking or undocking) With your computer in suspend mode (warm docking or undocking) With your computer operating (hot docking or undocking) Hot Warm Cold Dock Yes Yes Yes Undock Yes Yes* Yes * You can undock the computer from the port replicator through Direct Dock Adapter while the system is in suspend mode. The system resumes and starts processing for undocking (hot-undocking). The system reenters suspend mode again when it completes the process. Windows 98 (APM mode) and Windows 95 (Version 2.0 or later version) support hot- or warm-docking or -undocking your computer to and from the port replicator through the Direct Dock Adapter. You need to cold-dock or -undock if you use a different operating system. 124 IBM ThinkPad 570 User's Reference