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4.3 Call Confirmation Types
These settings apply to the alarm, check and error reporting calls.
1. With DTMF Confirmation
You can store up to 6 phone numbers including redialling attempts for control centre
calls.
then tries to call the numbers one by one.
uses DTMF as the most
LiftIP
LiftIP
reliable confirmation method. The control centre presses button
on its phone (in
the tone dialling mode) during manual call answering. If the called number is busy or
unanswered within a timeout or unconfirmed,
dials the next number in the
LiftIP
sequence until it exhausts the preset count of attempts for all the numbers stored.
Check calls are made equally, yet a separate set of six numbers can be used.
Evaluation of Dialling with Confirmation Situations
Situation
LiftIP activity
Call termination by the
counterparty (Busy, Number
not found, etc.)
Dials the next number immediately.
Call
Waits for a timeout (see parameter 913).
Ringing
Waits for a timeout (see parameter 913).
DTMF character
or
Hangs up immediately and dials the next number.
DTMF character
Confirms the connection (“Connection confirmed"), mutes the
announcement played and the call takes the maximum preset
time (Maximum call time).
These digits are interpreted as control characters
(refer to
2. Confirmation by Off-Hook
This mode is useful where no trained personnel are available as the called person does
not have to press any button. The two modes share a set of numbers, count of cycles
and responses to dialling situations. The difference is that the no-confirmation mode
