Systems Network Architecture Interactive Mainframe
Facility (SNA IMF) emulates the major features of an IBM 3270 control
unit, using the protocols of a Node Type 2.0 and Logical Unit Types
1, 2, and 3 (LU.T1, LU.T2, and LU.T3). SNA IMF supports interactive communication
between an HP 3000 and an IBM host. The host can be an IBM
System/370-compatible mainframe (for example, Model 370, 303x,
or 43xx), an IBM System/36 or System/38,
or an IBM AS/400.
If the HP 3000 will communicate with an IBM mainframe,
it must be connected to an IBM 37xx-compatible
communications controller that supports an SNA line. An HP 3000
can also be connected to the communications controller via an IBM 3710 network
controller. The host must use an IBM operating system with the Virtual Telecommunications
Access Method (VTAM) and must support remote IBM 3270 control
units.
SNA IMF uses one of these SNA link products:
SNA/SDLC Link: A bundled hardware
and software product that supports a logical and physical connection
to an SNA network.
SNA/X.25 Link: A software product that communicates
with the X.25 network through the X.25 XL System Access software
on the HP 3000.
SNA IMF and the SNA link form an HP 3000 subsystem
that emulates the IBM 3270 control unit in an SNA network.
Figure 1-1 “HP 3000-to-IBM Communication” shows the different LU types that
SNA IMF can implement.
Figure 1-1 HP 3000-to-IBM Communication
Note that SNA/SDLC Link is the only SNA link product shown
in the figure. For a description of all SNA link products, see the SNA
Link/XL Node Manager's Guide.
