Virtual Hometerm Subsystem (VHS) Manual (H06.03+)

Virtual Hometerm Subsystem (VHS) Manual—429311-001
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1 Introduction to VHS
This manual describes the NonStop Virtual Hometerm Subsystem (VHS). VHS acts as
a virtual home terminal for applications by emulating a 6530 terminal. VHS requires no
changes to your application. It runs as a named process with a subtype of 30 (device
emulation).
VHS receives messages normally sent to the home terminal, such as displays,
application prompts, COBOL run-time library errors, and Inspect or Debug prompts.
VHS uses these messages to generate event messages to the EMS collector to inform
operations staff of problems. You can use VHS with operator console applications,
such as ViewPoint or NonStop NET/MASTER, to highlight system or application
problems.
Benefits of VHS
VHS improves operations productivity by helping you avoid three known problems
related to using dedicated physical home terminals:
•
Inability of operations staff to find and respond to critical messages because of the
large volume of routine messages.
•
Need for constant monitoring of physical home terminals by operations staff.
•
Loss of productivity due to a stopped terminal that is waiting for a response.
VHS emulates a terminal, but does not have the disadvantages of a single, dedicated
physical terminal. VHS gives you the following benefits over a physical terminal:
•
Easy access to critical application messages
•
Centralized message handling
•
Freeing up of physical terminals
•
Automated handling of Inspect or Debug prompts
•
Improved availability of applications to end users
•
Information retrieval that highlights the cause of a problem, expediting its resolution