Use CWBPING.
The iSeries™ Access for Windows® product has a special command to verify status of host servers:
CWBPING systemname
where systemname is the name of the system.
The command should return something like the following:
To cancel the CWBPING request, press CTRL-C or CTRL=BREAK I - Verifying connection to system MYSYSTEM... I - Successfully connected to server application: Central Client I - Successfully connected to server application: Network File I - Successfully connected to server application: Network Print I - Successfully connected to server application: Data Access I - Successfully connected to server application: Data Queues I - Successfully connected to server application: Remote Command I - Successfully connected to server application: Security I - Successfully connected to server application: DDM I - Successfully connected to server application: Telnet I - Successfully connected to server application: Management Central I - Connection verified to system MYSYSTEM