18
SNA Distributed Host Command Facility
The HP SNA Distributed Host Command Facility/iX (HP SNA DHCF/iX) software product provides IBM mainframe users who use IBM 3270 display stations with interactive access to an HP 3000 Series 900 system. Together with the IBM Host Command Facility (HCF Version 2) product on the IBM mainframe system, SNA DHCF/iX gives IBM 3270 display station users the capability to run many applications on the HP 3000 system. These applications include
SNA DHCF/iX provides the data conversion services that translate output between applications on the HP 3000 and the IBM 3270 datastream required by IBM display stations. SNA DHCF/iX enables IBM 3270 display station users to access the HP 3000 system over their existing SNA, Token Ring, or X.25 network. SNA DHCF/iX requires the installation and use of the SNA/SDLC Link/iX (30292B and A5563A), SNA/Token Ring/iX (J2167B)*, or the SNA/X.25 Link/iX (36939B) product (referred to jointly as SNA Link). SNA Link products manage the physical link to the IBM mainframe and implement the datacomm protocols in the lower three layers of SNA.
*SNA/Token Ring Link/iX (J2167B) requires MPE/iX release 5.5 Express 5 or later, or MPE/iX release 6.0 Express 1 or later.
IBM S/370
Mainframe running
Host Command Facility
Communications
Controller
Features
¥ | SNA DHCF/iX provides IBM 3270 |
| display stations with HP terminal |
| capabilities including support for TTY- |
| mode (simple ASCII) applications and |
| many VPLUS applications. |
¥ | VPLUS has been optimized for |
| applications used with SNA DHCF/iX; |
| VPLUS forms can be compiled into |
| IBM 3270 terminal formats prior to |
| runtime. |
¥ | SNA DHCF/iX provides HP terminal |
| emulation support for screen sizes of |
| 24, 32, or 43 lines for |
| applications. VPLUS applications are |
| supported with screens of up to 24 |
| lines less any lines required for a |
| window line or softkeys. |
¥ | In VPLUS applications, SNA DHCF/iX |
| supports HP terminal softkeys (as PF |
| keys) and a ÒwindowÓ line on IBM |
| 3270 display stations using the |
| bottom three lines of the screen. |
¥ | One MPE/iX session is provided for |
| every SNA DHCF/iX user; each SNA |
| DHCF/iX session appears as a |
| Network Services Virtual Terminal |
| (NS VT) session. |
¥ | SNA DHCF/iX supports the HP ÒBreakÓ |
| and |
¥ | SNA DHCF/iX can support up to 64 |
| simultaneous sessions per SNA Link |
| node. Using multiple SNA Link nodes, |
| SNA DHCF/iXÕs session count is |
| limited only by the number of LDEVs |
| available on the HP 3000 |
¥ | Other HP SNA Service products are |
| supported over the same SNA Link; |
| each SNA Link can support up to |
| 64 Logical Unit (LU) sessions. The |
| maximum line speed supported by |
| SNA Link is 64 KB/s. |
¥ | SNA DHCF/iX users can access |
| HP MM II applications on the |
SNA Link(s) | |
SNA | Other HP |
DHCF/iX | SNA Services |
HP 3000/iX | |
IBM 3174
SNA DHCF/iX
Logical Session
IBM 3270 Display Stations
| HP 3000. |
¥ | SNA DHCF/iX provides a full screen, |
|
|
| HP DeskManager users. |
¥ | SNA DHCF/iX contains a |
| comprehensive and flexible logging |
| facility that records SNA DHCF/iX |
| session and error messages. |
HP 3000