At least through V5R4 the options available on wrkcfgsts are:
Specify Value for Parameter CFGTYPE
Type choice, press Enter.
Type . . . . . . . . . . . . . .
*NWS are Windows servers hosted on your iSeries.
*NWI are hosted Windows servers interfaces
*LIN are any communication line whether a line configuration attached to a Ethernet NIC or a .x25 or a *BSC moden line.
*CTL can be a local workstation controller, a virtual controller or a com controller attached to any line type. Local and virtual controllers may stand alone. But for most external com they will be attached to a line. For example an active ethernet nic has a line configuration that sets the line parameters, speed, logging, name, error handling ect. Attached to that is a controller that is actually a ‘driver’ for the TCPIP listener that lets the TCP stack know to listen to TCPIP com request through that NIC.
*DEV may be attached to most controller types, and again is a program driver specific to a device or communication type and will often (like the controller) reflect the name of the remote device it communicates with. *DEV and *CTL have a next level configuration type that indicate whether it is local, remote, LAN, lcl or rmt workstation, tape, modem and so on.