Filter
Top Products
Chapter 2 79
Introduction to SNAplus2
SNAplus2 Components
SNAplus2 TN server supports all TN3270 client emulation programs
that correctly implement the protocols defined in RFCs 1123, 1576, 1646,
and 1647.
When a TN3270 program communicates with TN server, SNAplus2
identifies the program by the TCP/IP address of the computer where the
TN3270 program is running. SNAplus2 cannot distinguish between two
different TN3270 programs being used by different users on the same
computer. In the SNAplus2 manuals, the term TN server user refers to
the computer where a TN3270 program is running, not to an individual
user of that program.
Each TN server user is normally configured to access a single 3270 LU,
and so is restricted to one host session at a time. However, you can also
configure a TN server user to access a pool of 3270 LUs, instead of having
a single dedicated 3270 LU for each user. This enables the user to access
as many sessions as there are available LUs in the pool.
User Applications
SNAplus2 supports the following user applications:
• 3270 emulation programs (see “3270 Emulation”).
• 5250 emulation programs (see “5250 Emulation”).
• RJE workstation daemon (see “RJE Workstation Daemon”).
3270 Emulation
You can use 3270 emulation software to log on to and use SNA host
systems from your computer, control display and printer emulation
sessions, and to transfer files between the local and host computers. 3270
emulation uses the node's LU type 0–3 resources.
To use 3270 emulation, you need to define the 3270 users on your system,
identified by their login IDs, and the 3270 features available to each user
or group of users. 3270 users and sessions are defined as domain
resources, which simplifies the configuration required to support
emulation across the domain.
The SNAplus2 3270 emulation program provides session control and file
transfer capabilities. In addition, you can customize some 3270
emulation features, such as key-mapping and display attributes.
SNAplus2 3270 emulation also enables you to use HLLAPI applications.