4 call confirmation types, With dtmf confirmation – 2N Lift8 v1.5.2 User Manual
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4.4 Call Confirmation Types
The settings included in this subsection apply to alarm calls (sets 1,2), check calls and
trouble reports.
1. With DTMF Confirmation
Up to 6 telephone numbers plus the count of repetitions can be stored for control
centre dialling.
then tries to call all the numbers stored. Tone dialling (DTMF) is the
L8
most reliable service for confirmation of successful calls. Having received a call
manually, the control centre officer has to press the
button on its tone-dialling
phone. If the called line is busy or unanswered within a timeout, or the call is not
confirmed,
dials the next number in the sequence until it exhausts all the pre-set
L8
attempts. The procedure is the same for check calls or failure reports but a separate
group of six numbers can be used.
Evaluation of Situations in Dialling with Confirmation
Situation
L8 activity
No dialtone on
the line (PSTN
line only)
hangs up.
L8
Busy tone after
dialling end
hangs up and dials the next number.
L8
Call or silence
(after dialling
end)
waits for the defined time (parameter 913).
L8
Ringing tone
waits for the defined time ( parameter 913).
L8
Continuous tone
(on PBX line,
e.g.)
hangs up and dials the next number.
L8
DTMF char
or
hangs up immediately and dials the next number.
L8
DTMF char
confirms receipt ("Connection confirmed") and mutes the
L8
currently played announcement. The call goes on for the maximum
call time as configured.