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3276/78 Emulation Mode
PREPARING YOUR TERMINAL FOR USE
Pre-Installation Preparations
The customer must take the following steps before attempting to install an HP 2625A into an
IBM 3270 Display System environment.
• Have available a host system capable of communicating with a remote, BSC
(BiSynchronous Communications) 3276 Control Unit.
• Configure the host system to recognize another 3276 Control Unit. This may involve gen
changes to the host operating system, teleprocessing subsystem software, and/or front end
processor. You may also need to install additional hardware on the host system to permit
support of a remote BSC 3270 port.
• Ensure that the modem link between the host system and the 3276 Control Unit is opera-
tional. When HP modems are being used, HP will assist in verifying that the modems are
operational.
• If possible, test the host configuration and the communications link by running a program
on the remote 3276 Control Unit. This is the best way to verify that the host configuration
and the communications link are operating correctly.
Cable Connections
No special actions are required for connecting either power or the keyboard to your terminal
(see Section 2 of the User Manua!). Section 2 of the User Manual also describes the procedure
for connecting the terminal to an HP computer over an RS-232-C point-to-point cable. See the
.appropriate parts of this Reference Manual for directions on how to connect your terminal to
the alternate peripheral interface (a subset of HP-IB) and the DSN/Data Link. External
printers also connect to the terminal as previously described.
Supporting IBM data communications requires special hardware. Therefore, the factory con-
figures Port 2 as the IBM datacomm port. Although you have some flexibility in configuring
Port 1, you must always connect Port 2 to the IBM (or IBM-compatible) system.
For each modem drop, the first terminal must be connected to the host computer through a
modem (or modem bypass cable). Thereafter, subsequent terminals are connected to each
other in daisy-chain fashion.
Each terminal within a daisy-chain multipoint line contains a multipoint interface. Two
types are available:
• First Multipoint Interface. This interface connects the first terminal in the group to the
modem or hardwire cable. The interface operates in synchronous mode.
• Synchronous Daisy Chain Multipoint Interface. This interface connects successive termi-
nals within a synchronous daisy-chain group.
F-18
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