Session Service Implementation

A programmed Master Terminal Operator interface, referred to as the virtual MTO, implements session services. CL/SuperSession issues IMS operator commands to display the current status of the real or virtual terminal PTERM associated with the user. Depending on the results and the particular session service selected, the virtual MTO issues additional commands to start and stop the PTERM, purge queued messages, or make LTERM assignments.

The virtual MTO appears to IMS as an authorized operator using standard IMS/DC command facilities. IMS provides the ability to limit operator command authorities. The programmed MTO requires the ability to issue the commands shown below. If password protection is generated for any of these commands, the appropriate password can be supplied in the IMS statement that defines the IMS/DC environment.

ASSIGN          START          RSTART          EXIT
DISPLAY          STOP          DEQUEUE

To activate the virtual MTO interface, you must establish one or more sessions between CL/SuperSession support for IMS and IMS/DC. Hardware and IMS/DC software modifications are not required. To establish the communication path between the virtual MTO and IMS/DC, you need to define VTAM®, CL/SuperSession, and IMS resources.

The same set of virtual MTOs can be used for more than one IMS subsystem. See Virtual Terminal Sharing.