Device overview

JES2 is responsible for controlling all system input devices, initiators, and output devices, except those devices controlled by the external writer and programs interfacing with JES2 through an internal reader. The JES2 initiator and device control commands, except the $T command for devices, can be used to control several local and/or remote devices simultaneously. You can specify local input and output devices by either their full or abbreviated names. The device namesand their abbreviations are:

Device Name	Abbreviation	Explanation
LINE(nnnn)	LNE(n)	RJE or NJE line (1-32767)
LOGON(n)	LGN(n)	JES2/VTAM interface
NETSERV(n)	NSV(n), NETSRV(n)	JES2 TCP/IP interface
L(n).JR(n)		NJE job receiver
L(n).JT(n)		NJE job transmitter
L(n).SR(n)		NJE SYSOUT receiver
L(n).ST(n)		NJE SYSOUT transmitter
OFFLOAD(n)		Offload device
OFF(n).JR		Offload job receiver
OFFn.JT		Offload job transmitter
OFFn.SR		Offload SYSOUT receiver
OFFn.ST		Offload SYSOUT transmitter
PRINTERnnnn	PRTnnnn	Local printers 1-32767
PUNCHnn	PUNn	Local punches 1-99
RDI		All internal readers 1-32767
READER(nn)	RDR(nn)	Local readers
R(nnnn).CON*		Remote console
R(nnnn).PR(m)*		Remote printers
R(nnnn).PU(m)*		Remote punches
R(nnnn).RD(m)*		Remote readers

All JES2 input devices, initiators, and output devices are in one of several states:

Active: The device or initiator is actively performing a function.
Inactive: The device or initiator is available to perform a function, but no jobs are available.
Startable: A $S command has been issued for the indicated offload transmitter/receiver, but the corresponding offload device has not yet been started.
Starting (JES2): An MVS™ START command has been issued to activate an initiator, but successful creation of the address space has not been verified. The initiator is not processing work and will not do so until a request is made by MVS started task control to start the initiator job.
Starting (device): A device supported by a functional subsystem (such as a 3800-3 printer) has been started by a $S device command, but successful creation and initialization of the functional subsystem address space has not been verified. The device becomes active or inactive when functional subsystem initialization is complete.
Draining: The device or initiator is performing a function, but will not begin any new activity upon completion of the current function.
Drained: The device or initiator is inactive and will not become active until you enter a $S command for the device or initiator.
Halting: The initiator is active, but will not select another job after completing the current function.
Halted (initiator): The initiator is inactive and will not become active until you enter a $S command. This differs from drained because the system does not free the resources associated with the initiator.
Halted (device): The device has been halted by a $Z device command or by a requirement for you to perform an action, such as changing the forms, carriage tape, or print train. A $S device command will allow the device to continue.
Paused: The local printer or punch has paused between data set groups. It can be restarted by entering a $S command or by resetting it from a not-ready to a ready state.

Keep the following in mind when entering JES2 device control commands:

You can enter up to 20 operands in a single JES2 initiator command or device control command.
Devices generally perform the requested operation after the response to the command.
Many commands will accept operands as valid, even though the devices are unable to perform the requested function.
If you enter an incorrect operand on a device command other than a $T device command, JES2 processes all operands preceding the incorrect operand. The operand in error, and those that follow, are ignored.
Operators at JES2 remote workstations can normally control only the devices attached to their workstations.