5.1 Function Description

Purpose

The purpose of this section is to provide aid in troubleshooting. If the system fails to work correctly, a qualified technician is commissioned to follow its operation according to the descriptions included herein. Having found a discrepancy between a description and reality, the technician describes this discrepancy, which significantly accelerates finding of the trouble cause. This procedure often reveals that the system works properly but the user had a different idea of its function.

Outgoing Call

The process is initiated by pressing the ALARM button on the audio unit (CANCEL may delay or block the execution). When the ALARM button is pressed, 2N® LiftIP 2.0 establishes connection with the control center (refer to Automatic Dialing for details). 2N® LiftIP 2.0 plays the “Wait please, connection is being established” message to the person in the lift and “Press 1 for confirmation” to the control center (if DTMF 1 confirmation is used). It is necessary to confirm the call manually or automatically. The call is time limited (Attention, the call end is near. Press 4 to extend the call.”), but can be extended. Refer to the Control Center Instructions Subs. for control during a call (DTMF dialing).

Tip

  • Set the alarm call destinations and checking and operational call destinations.

Checking Call

Checking call is an automatically made outgoing call (typically once in 3 days) whose purpose is to check the 2N® LiftIP 2.0 function. The operation is the same as with an outgoing call. The difference is that a different announcement is played, e.g. “This is a checking call”, and a different set of phone numbers is used (refer to 4.3.6 Checking Call). The checking call enables automatic processing.  A checking call voice message is played for manual pickup (confirmation 1 or pickup setting) and no message is played for automatic processing.

Tip

  • A checking call can be initiated manually too. The regular checking call schedule is not affected.

Caution

  • If the checking callmemory set is completely empty, no checking call is made, even to the alarm call memory set.

Operational Call

Operational call is a call made automatically whenever a defined event happens (stuck button, rescue end, audio error, ...). Refer to Subs. 4.3.7 Notifications for settings and details.

Incoming Call

The control center can also call the 2N® LiftIP 2.0 number, which automatically receives every incoming call. The incoming call is time limited and controlled like the outgoing call (extension, identification).

The incoming call can, for example, inform a trapped person about the rescue squad arrival, etc. Also, it helps check 2N® LiftIP 2.0 remotely for proper function and connection.

Useless Startup Protection

As the only purpose of 2N® LiftIP 2.0 is to call for help when a person gets trapped in a lift, no call is necessary if the cabin door is open. If the lift is equipped with a door contact, connect the contact to the 2N® LiftIP 2.0 CANCEL input and define a timeout for 2N® LiftIP 2.0 to wait after the ALARM button is pressed until it establishes connection. Thus, if the ALARM button is pressed by mistake, the lift arrives in a floor, the door opens and the call is canceled. Also, the minimum button pressing time can be set to eliminate erroneous pressing of the button.

Call End (Outgoing/Incoming)

The call end (line hang-up) occurs whenever any of the below listed situations happens:

  • The counterparty (control center) hangs up;
  • The maximum call duration expires – 10 s before the expiry, 2N® LiftIP 2.0 plays the “Attention, the call end is near. Press 4 to extend the call.” to allow you to extend the call.