GAI-Tronics CB193-001 Call Boxes - Manual (Page 28)

Pub.: 43004-031E
Model CB193-xxx, CB194-xxx, and CB195-xxx RF Call Boxes Page 27 of 52
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PL1877A Does Not Respond to Initialization; Call Aborted
Step Action Response
1 User presses and releases PTT
button Call Box wakes from low power sleep mode, checks transmit
channel activity and status lamp slowly flashes red to
indicate unit is operating.
2 No transmit channel activity
detected Call Box keys radio and initiates communication with
PL1877A. Status lamp slowly flashes red to indicate unit is
operating.
3 PL1877A not detected and
terminates call The status lamp flashes red, the Call Box terminates the call
with the PL1877A, and emits three tones to the speaker. Call
Box terminates the call by powering down the radio and
audio circuitry. The status light is off and the unit returns to
its low-power sleep mode.
PL1877A Does Not Respond to Dialed Number; Call Aborted
Step Action Response
1 User presses and releases PTT
button Call Box wakes from low power sleep mode, checks transmit
channel activity and status lamp slowly flashes red to
indicate unit is operating.
2 No transmit channel activity
detected Call Box keys radio and initiates communication with
PL1877A. Status lamp slowly flashes red to indicate unit is
operating.
3 PL1877A detected and dials
phone number Call Box dials preprogrammed number. Status lamp slowly
flashes red to indicate unit is operating.
4 PL1877A did not respond to
numbers dialed and terminates
call The status lamp flashes red, the Call Box emits three tones to
the speaker. Call Box terminates the call by powering down
the radio and audio circuitry. The status light is off and the
unit returns to its low-power sleep mode.