User's Manual

STRATEGIC Technologies Inc.
Ref. Doc. No. R.D.5.3.1I Rev 0.1 Jan 18/1999
PRU Basics
Page 11
During a call, if successful, the PRU+ will receive configuration parameters, the current date / time from
the central computer, and all stored information in the PRU+ will be transmitted to the CC. It will also
receive the participant’s curfew information for the current day and the following day. When the call has
been completed, the PRU+ will display the result of the call, either "Call Successful", or an error
message such as "No Dialtone", "CC Busy", etc. (See Call Attempt Error Messages Page 9 for more
details).
Between phone calls, the PRU+ will display only the date and time. When the PRU attempts to call the
central computer, the PRU+ will report its status on the bottom line of the display.
PRU+ Calling the Central Computer (CC)
The PRU+ will periodically call the central computer, for either a scheduled call-in check, to report an
alarm or to report an alarm clear event. These calls will proceed in exactly the same fashion as
described in the section above “PRU+ Operation”. If a call attempt fails, the PRU+ will display the
reason for the failed call attempt on the bottom of the display. The PRU+ will attempt to call again in
a few minutes, and repeatedly at varying intervals, until the maximum re-dial attempts (14 attempts) is
made. Any event that is generated after the maximum re-dial attempts is made will cause the PRU+
to repeat the dialling sequence. While the PRU+ is waiting to make another call attempt, if the previous
attempt failed, a code indicating the reason for the failure will be displayed at the bottom right corner
of the display. This code matches the previously displayed message. The codes are as follows:
Call Attempt Error Messages
Code Display Message
Description
2 CC Busy The CC number was busy.
3 No Dialtone The participant’s phone line was already in use.
4 No Connect The call was interrupted while the PRU+ was dialling or
the PRU+ dialled but never connected to the CC.
5 Communication Error The call was interrupted while connected to the CC.
B Blind Dial If any call attempt errors occur while the PRU+ is in blind
dial mode a “B” will be placed to the right of the numeric
code. (See below for more information on blind dial
mode).
01/05/98 02:32PM
Call Successful