Distributed Name Service (DNS) Management Programming Manual

Overview of D-Series Operating System Changes Affecting EMS
Update for D-Series Operating Systems
I–4 46958 Tandem Computers Incorporated
Communication Between High-PIN and Unconverted (Low-PIN) EMS Processes
While you can run an unconverted C-series program—such as an EMS management
application—on a D-series operating system, there are restrictions to the
communication allowed between this process and D-series processes. There are also
restrictions to the communication allowed between a C-series (low-PIN) process
running on a C-series operating system and a high-PIN process running on a D-series
operating system. The following examples describe communication paths you might
want to use between high-PIN and low-PIN EMS processes.
A high-PIN management application on a D-series operating system cannot open
a low-PIN consumer distributor running on a C-series operating system.
A low-PIN EMS management application running on a D-series operating system
can open a high-PIN consumer distributor on the same system.
An EMS subsystem running on a C-series operating system can open an alternate
collector on a D-series operating system to send it event messages only if the
alternate collector is running at a low PIN.
A high-PIN EMS subsystem (on a D-series operating system) cannot open an
alternate collector running on a C-series operating system.
High-PIN EMS subsystems on a D-series operating system can open either
high-PIN or low-PIN collectors on a D-series system.
Figure I-2 shows paths of communications you might want to use between EMS
consumer distributors, alternate collectors, EMS subsystems, and management
applications on both C-series and D-series operating systems. Some of these paths are
permitted; some (marked with an X) are not.