OSI/TS Management Programming Manual

C-Series and D-Series Compatibility
Introduction
056786 Tandem Computers Incorporated 1–15
OSI/TS Running in Mixed
C-Series and D-Series
Expand Networks
The following subsections contain OSI/TS-specific information for communicating
with processes having various combinations of version levels. In all cases, the version
compatibility rules described earlier apply between any two processes, regardless of
whether the processes are running in the same system or on different systems in an
Expand network.
For example, an application and a OSI/TS process can both be running in D-series
systems. When a connection is established, the application and OSI/TS can run at
either a high or low PIN. However, that same connection may also use an X25AM
process that is running in a C-series system. Because the X25AM process requires a
low PIN, the OSI/TS process for that connection (which directly interfaces with the
X25AM process) must also run at a low PIN. Therefore, the connection might look like
the following;
Application Process OSI/TS Process X25AM Process
D-series system: HIGH PIN D-series system: LOW PIN C-series system: LOW PIN
In a different example, an application in a C-series system might establish a connection
with an OSI/TS process also running in a C-series system (either C21, or C30 or
higher), but the TLAM process might be running in a D-series system. In this case, the
TLAM process must run at a low PIN (even though it is running in a D-series system)
because it directly communicates with a C-series process. The connection might look
like the following:
Application Process OSI/TS Process TLAM Process
C-series system: LOW PIN C-series system: LOW PIN D-series system: LOW PIN
Note In Expand networks with mixed C-series and D-series systems, TSP processes must adhere to the
C-series system file naming rules.
Managing C30 OSI/TS (in a D-Series System) Using C21 SCF or SCP (in a C-Series System)
New DSM functionality provided by the C30 version of OSI/TS is available only with
C30 or later versions of SCF and SCP. This means that new information fields
provided by OSI/TS are not accessible to nor displayed by C21 SCF.
Managing C21 OSI/TS (in a C-Series System) Using C30 SCF or SCP (in a D-Series System)
New DSM functionality provided by the C30 version of SCF is available only with C30
or later versions of OSI/TS. This means that new information fields provided by the
C30 SCF are not recognized by C21 OSI/TS (C21 OSI/TS does not supply information
for these fields). C30 SCF commands containing new attributes are rejected by C21
OSI/TS.