RFL 9660 RFL Electronics Inc.
April 24, 2007 4-1 (973) 334-3100
Section 4. USING THE SWITCH
4.1 INTRODUCTION
The commands in this section can be used by all RFL 9660 users to run diagnostic checks, access device
ports, and display port information. If you are logged onto the RFL 9660 as the "super-user," you can also use
the configuration commands described in Section 5 of this manual.
To use the general access commands, you must have a PC with a 286 (or better) processor and a Hayes-
compatible modem. The PC must be equipped with either Microsoft Windows (Version 3.1.), or a terminal
emulator program. A mouse is optional but its presence will simplify use, especially when running Windows.
Windows is recommended because it contains a terminal emulator and has multi-tasking capabilities. However,
some application software packages for substation equipment contain emulation programs, eliminating the need
for a separate program.
4.2 SETTING UP THE MODEM
Before trying to access the RFL 9660 from a remote PC or terminal, you must have a Hayes-compatible
modem. This can be a plug-in card inside your PC, or an external modem. The following settings must be
changed on your modem to make it compatible with the RFL 9660. Refer to the manual furnished with your
modem for more information on how to make these settings.
AUTO-ANSWER The modem's auto-answer function must be enabled. This will allow the RFL 9660 to
call your modem if the RFL 9660's callback feature has been enabled. You can enable
auto-answer by issuing an "ATS0=2" command; this will tell your modem to answer a
call after two rings.
DTR You must set your modem to ignore its DTR (Data Terminal Ready) line. This will stop
your modem from hanging up when you are switching between application programs.
You can tell your modem to ignore the DTR line by issuing an "AT&D0" command.
ERROR DETECTION If your modem supports v.42 or MNP error detection, it should be enabled; this is what
the RFL 9660 uses. If your modem uses any other form of error detection, it must be
disabled.
4.3 USING MICROSOFT WINDOWS TO LOAD AND RUN APPLICATIONS
The following procedure will set up Microsoft Windows for use with the RFL 9660. Windows is optional, but it is
recommended because of its multi-tasking capabilities. This will make it easy to switch from one application
software package to another while you are accessing the RFL 9660.
If you want to use Windows to load and run your applications software and you don't have Windows installed on
your PC yet, install it now. Refer to the documentation supplied with your Windows diskettes for instructions on
how to do this.
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