HP 3000 Manuals

HP Telnet/iX Users Guide

Suspending the Telnet/iX Client 

You can suspend the Telnet/iX Client and return to the MPE/iX prompt by
using the Z command: 

     telnet> Z

     :

Suspending the Telnet/iX Client using this command is equivalent to
pressing the [Break] key.  The RESUME or ABORT command can then be used
on the program.

MPE/iX 5.5 Documentation