CTI Products CHIB CommandSTAR Lite Host Interface Module - Manual (Page 7)

CHIB Hardware Reference Theory of Operation
CTI Products, Inc.
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3
The comparator generates the status signals. They are passed through the AIB or
CIB module, through the MCN network, through the CHIB, the 485 converter,
and into the console.
2.2 Comparator Controls
The CHIB maps buttons on the console to the Force Vote and Disable controls on
the comparator. The CHIB forwards the messages on to the AIB or CIB, which
then pass the signals or messages to the comparators.
The CHIB module does not provide direct feedback to the console operator on its
own. Control feedback (the Voted or Disabled LED) comes from the comparator
as described in Status Indications, above.
2.3 Vote Hold Feature
The Vote Hold feature allows an extended Vote Indication on the console. This
provides the operator an indication of which site the last call came from. When
all Vote signals go inactive, the CHIB will hold the last voted indication ON for
the period of time specified on the Vote Hold Time switches.
If a new site votes during the Hold Time, the CHIB will display the new site, and
will re-start the hold Time at the end of that transmission.
Vote Hold times are switch selectable from 0 (off) to 63 seconds, in increments of
1 second.
2.4 Console LED Blank Feature
If the CHIB looses communications with the AIB or CIB for a period of about 20
seconds, it will turn off all console LEDs that are mapped to it. This indicates that
communications is lost. It will set the console LEDs to their proper state when
communications with the AIB or CIB is reestablished.