The IBM ThinkPad Enhanced Port Replicator contains basic pass-through connections for the notebook ports. It comes without integrated power supply but provides the same AC port as found in a ThinkPad, so you need to use either your Thinkpad AC adapter or another IBM AC adapter. Besides all the pass-through ports the Port Replicator comes with an On/Off switch and a slot for a cable lock (only for the dock though).
Serial (9 pin)
Parallel (25 pin)
2 PCMCIA ports for 2 Type II or 1 Type III PC Cards