12
MINISTAT-FOUR
When you receive your MiniStat-Four, its “normal” configuration will be the same
as the factory-default configuration.
You might have to select the factory-default configuration (INIT) in the future if
either of the following situations occurs:
• An error is made during the configuration session, which either prevents
communication between the control terminal and the MiniStat-Four or
proves difficult to trace and correct.
• The description of the configuration loaded into the MiniStat-Four (including
any passwords) is lost, and it is therefore not possible to enter the configur-
ation mode in the NOR mode. To avoid this inconvenience, always keep a
record of the last configuration parameters (a typical record form is shown
in
Appendix B
).
After the default configuration loads, it becomes the current MiniStat-Four
configuration; return the jumper to the NOR position so that, once you change
the configuration back to what it’s supposed to be and save it in NVRAM, the
MiniStat-Four will load it at its next power-up.
3.3.2 PIN 21 ON/OFF J
UMPER
Pin 21 of the standard RS-232 interface can serve either as a signal-quality-
indication (SQ) line, or as a remote-loopback-command line. The actual function
depends on the specific model of modem in use, and a jumper adapts
the MiniStat-Four to the modem connected to the composite link connector.
The jumper has two positions:
• PIN 21 ON — Set the jumper to this position when the modem uses pin 21 as
a remote-loopback-command line. This connects the internal MiniStat-Four
pin 21 driver to this pin, and lets you control this modem function using the
diagnostics screen.
• PIN 21 OFF (the factory-default setting) — Set the jumper to this position
when the modem uses pin 21 as a signal-quality-indication output. Use this
position whenever you are in doubt about the actual function of the pin in the
modem you use. In this position, you no longer have control of the modem’s
remote-loopback function from the diagnostics screen.
