Ko Fei Pu
   I've tried unsuccessfully to setup an IBM Thinkpad 700/PS2 with Xircom multiplexor. I'm using Xircom Token Ring pocket adapter, if connected directly to the parallel port there's no problem, but if a use the multiplexor it simply hung. I've called IBM and Xircom to no avail.

Michael R. Fox
    I've just set up some twisted pair xircom adapters and had some 
problems with setting them up. After talking to xircom I was told that the adapter HAS to be plugged into the B port on the mux and the printer HAS to have power for the mux to work (turned on and plugged into the mux).  In my case I had to load the odi or packet driver twice if the adapter was plugged into the A port on the mux.  Once I moved the adapter to the B port everything worked fine. So much for the manual.

Derek Rowell
   Incidentally I've found the Xircom PPX parallel port multiplexor to be an excellent add-on to allow printing while connected to the network.  You print  to LPT1 while using LPT2 for the network.  It can be be slow - but if you print to LPT1.DOS it is much better.