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. 2N® LiftIP then tries to call the numbers one by one. 2N® LiftIP uses DTMF as the most 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, 2N® LiftIP dials the next number in the 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 | 2N® 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 | 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 |
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 recognises the ringing tone and if the tone ends before the preset count of rings, it means that the called user is off-hook and this is considered a successful connection. The announcer cannot be controlled with buttons to 
.
Evaluation of Loud Automatic Dialling without Confirmation Situations
Situation | 2N® LiftIP activity |
|---|---|
Call termination by the counterparty (Busy, Number not found, etc.) | Dials the next number immediately. |
Call | Waits for a preset time (login timeout), then hangs up and dials the next number. |
Ringing | Waits for a preset time (login timeout), then hangs up and dials the next number. |
Warning
- Make sure before using this mode that no VoiceMail box, fax machine or any other device that could answer the call before the preset rings is installed on any of the numbers to be called to avoid automatic dialling termination.
3. and 4. CPC (Antenna and KONE)
Used wherever the counterparty is equipped with the required SW. When the line is answered, a DTMF string is sent and the lift is identified. The call is either switched to voice communication (alarm call) or confirmed automatically and terminated (check call).
5. P100
Used wherever the counterparty is equipped with the required SW. When the line is answered, a DTMF character is sent and the lift is identified. The call is either switched to voice communication (alarm call) or confirmed automatically and terminated (check call).
6. DTMF Protocol Auto Detection (CPC/P100)
When the DTMF string is sent, the lift identifies the protocol and responds accordingly.
Warning
- If, for example, the call is routed via GSM, 2N® LiftIP may not detect the DTMF characters and identify the protocol.
- If this happens, we recommend you to change the CPC or P100 settings (3 or 5).
7., 8., 9. CPC (Antenna and KONE), P100 2N ext (for alarm calls only)
The protocols work as described in items 3 and 4 for CPC and item 5 for P100. The only difference is that the audio unit type is transmitted too. Used for alarm calls to the communicator only.